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<h1>inheritance_spec.sl</h1>
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<td class="code-content"><pre>// ============================================================================</pre></td>
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<td class="code-content"><pre>// Class Inheritance Test Suite</pre></td>
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<td class="code-content"><pre>// ============================================================================</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre>describe("Class Inheritance Basics", fn() {</pre></td>
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<td class="code-content"><pre> test("subclass inherits from superclass", fn() {</pre></td>
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<td class="line-num">7</td>
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<td class="code-content"><pre> class Animal {</pre></td>
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<td class="line-num">8</td>
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<td class="code-content"><pre> name: String;</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> new(name: String) {</pre></td>
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<td class="code-content"><pre> this.name = name;</pre></td>
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<td class="line-num">12</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">14</td>
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<td class="code-content"><pre> fn speak() -> String {</pre></td>
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<td class="line-num">15</td>
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<td class="code-content"><pre> return "...";</pre></td>
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<td class="line-num">16</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">19</td>
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<td class="code-content"><pre> class Dog extends Animal {</pre></td>
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<td class="line-num">20</td>
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<td class="code-content"><pre> fn speak() -> String {</pre></td>
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<td class="line-num">21</td>
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<td class="code-content"><pre> return "Woof!";</pre></td>
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<td class="line-num">22</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> let dog = new Dog("Buddy");</pre></td>
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<td class="line-num">26</td>
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<td class="code-content"><pre> assert_eq(dog.name, "Buddy");</pre></td>
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<td class="line-num">27</td>
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<td class="code-content"><pre> assert_eq(dog.speak(), "Woof!");</pre></td>
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<td class="line-num">28</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">29</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">30</td>
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<td class="code-content"><pre> test("subclass can extend inherited behavior", fn() {</pre></td>
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<td class="line-num">31</td>
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<td class="code-content"><pre> class Shape {</pre></td>
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<td class="line-num">32</td>
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<td class="code-content"><pre> fn description() -> String {</pre></td>
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<td class="line-num">33</td>
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<td class="code-content"><pre> return "A shape";</pre></td>
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<td class="line-num">34</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">37</td>
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<td class="code-content"><pre> class Circle extends Shape {</pre></td>
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<td class="line-num">38</td>
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<td class="code-content"><pre> radius: Float;</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> new(radius: Float) {</pre></td>
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<td class="line-num">41</td>
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<td class="code-content"><pre> this.radius = radius;</pre></td>
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<td class="line-num">42</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">44</td>
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<td class="code-content"><pre> fn area() -> Float {</pre></td>
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<td class="line-num">45</td>
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<td class="code-content"><pre> return 3.14159 * this.radius * this.radius;</pre></td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">49</td>
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<td class="code-content"><pre> let c = new Circle(5.0);</pre></td>
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<td class="line-num">50</td>
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<td class="code-content"><pre> assert_eq(c.description(), "A shape");</pre></td>
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<td class="line-num">51</td>
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<td class="code-content"><pre> assert_eq(c.area(), 78.53975);</pre></td>
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<td class="line-num">52</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">54</td>
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<td class="code-content"><pre> test("deep inheritance chain", fn() {</pre></td>
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<td class="line-num">55</td>
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<td class="code-content"><pre> class A {</pre></td>
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<td class="code-content"><pre> fn method_a() -> String {</pre></td>
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<td class="code-content"><pre> return "A";</pre></td>
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<td class="line-num">58</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">59</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">61</td>
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<td class="code-content"><pre> class B extends A {</pre></td>
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<td class="code-content"><pre> fn method_b() -> String {</pre></td>
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<td class="line-num">63</td>
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<td class="code-content"><pre> return "B";</pre></td>
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<td class="line-num">64</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">65</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">66</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">67</td>
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<td class="code-content"><pre> class C extends B {</pre></td>
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<td class="line-num">68</td>
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<td class="code-content"><pre> fn method_c() -> String {</pre></td>
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<td class="code-content"><pre> return "C";</pre></td>
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<td class="line-num">70</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">73</td>
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<td class="code-content"><pre> let c = new C();</pre></td>
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<td class="line-num">74</td>
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<td class="code-content"><pre> assert_eq(c.method_a(), "A");</pre></td>
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<td class="line-num">75</td>
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<td class="code-content"><pre> assert_eq(c.method_b(), "B");</pre></td>
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<td class="line-num">76</td>
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<td class="code-content"><pre> assert_eq(c.method_c(), "C");</pre></td>
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<td class="line-num">77</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">78</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">79</td>
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<td class="code-content"><pre> test("instance type shows most derived class", fn() {</pre></td>
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<td class="line-num">80</td>
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<td class="code-content"><pre> class Base {</pre></td>
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<td class="line-num">81</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> class Derived extends Base {</pre></td>
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<td class="line-num">84</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">85</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">86</td>
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<td class="code-content"><pre> let d = new Derived();</pre></td>
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<td class="line-num">87</td>
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<td class="code-content"><pre> assert_eq(type(d), "Derived");</pre></td>
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<td class="line-num">88</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">89</td>
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<td class="code-content"><pre>});</pre></td>
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<td class="line-num">90</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">91</td>
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<td class="code-content"><pre>describe("super Keyword", fn() {</pre></td>
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<td class="line-num">92</td>
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<td class="code-content"><pre> test("super.method() in instance methods", fn() {</pre></td>
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<td class="line-num">93</td>
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<td class="code-content"><pre> class Base {</pre></td>
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<td class="line-num">94</td>
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<td class="code-content"><pre> fn greet() -> String {</pre></td>
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<td class="line-num">95</td>
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<td class="code-content"><pre> return "Hello";</pre></td>
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<td class="line-num">96</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">97</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">98</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">99</td>
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<td class="code-content"><pre> class Derived extends Base {</pre></td>
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<td class="line-num">100</td>
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<td class="code-content"><pre> fn greet() -> String {</pre></td>
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<td class="line-num">101</td>
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<td class="code-content"><pre> return super.greet() + " World";</pre></td>
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<td class="line-num">102</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">103</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">104</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">105</td>
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<td class="code-content"><pre> assert_eq(new Derived().greet(), "Hello World");</pre></td>
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<td class="line-num">106</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">107</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">108</td>
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<td class="code-content"><pre> test("super with field access", fn() {</pre></td>
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<td class="line-num">109</td>
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<td class="code-content"><pre> class Base {</pre></td>
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<td class="line-num">110</td>
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<td class="code-content"><pre> value: Int = 10;</pre></td>
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<td class="line-num">111</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">112</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">113</td>
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<td class="code-content"><pre> class Derived extends Base {</pre></td>
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<td class="line-num">114</td>
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<td class="code-content"><pre> fn get_value() -> Int {</pre></td>
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<td class="code-content"><pre> return this.value;</pre></td>
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<td class="line-num">116</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">117</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">118</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">119</td>
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<td class="code-content"><pre> assert_eq(new Derived().get_value(), 10);</pre></td>
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<td class="line-num">120</td>
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<td class="code-content"><pre> });</pre></td>
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<td class="line-num">121</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">122</td>
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<td class="code-content"><pre> test("super in constructor", fn() {</pre></td>
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<td class="line-num">123</td>
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<td class="code-content"><pre> class Person {</pre></td>
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<td class="code-content"><pre> name: String;</pre></td>
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<td class="line-num">125</td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> new(name: String) {</pre></td>
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<td class="line-num">127</td>
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<td class="code-content"><pre> this.name = name;</pre></td>
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<td class="line-num">128</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">129</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">131</td>
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<td class="code-content"><pre> class Employee extends Person {</pre></td>
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<td class="line-num">132</td>
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<td class="code-content"><pre> employee_id: Int;</pre></td>
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<td class="line-num">133</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">134</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> new(name: String, id: Int) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">135</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> super(name);</pre></td>
</tr><tr class="code-line">
<td class="line-num">136</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.employee_id = id;</pre></td>
</tr><tr class="code-line">
<td class="line-num">137</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">138</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">139</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">140</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let e = new Employee("Alice", 123);</pre></td>
</tr><tr class="code-line">
<td class="line-num">141</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(e.name, "Alice");</pre></td>
</tr><tr class="code-line">
<td class="line-num">142</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(e.employee_id, 123);</pre></td>
</tr><tr class="code-line">
<td class="line-num">143</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">144</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">145</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("super chaining in deep hierarchy", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">146</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class GrandParent {</pre></td>
</tr><tr class="code-line">
<td class="line-num">147</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn identify() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">148</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return "GrandParent";</pre></td>
</tr><tr class="code-line">
<td class="line-num">149</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">150</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">151</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">152</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Parent extends GrandParent {</pre></td>
</tr><tr class="code-line">
<td class="line-num">153</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn identify() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">154</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return super.identify() + " -> Parent";</pre></td>
</tr><tr class="code-line">
<td class="line-num">155</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">156</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">157</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">158</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Child extends Parent {</pre></td>
</tr><tr class="code-line">
<td class="line-num">159</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn identify() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">160</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return super.identify() + " -> Child";</pre></td>
</tr><tr class="code-line">
<td class="line-num">161</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">162</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">163</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">164</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Child().identify(), "GrandParent -> Parent -> Child");</pre></td>
</tr><tr class="code-line">
<td class="line-num">165</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">166</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">167</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("super in static method", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">168</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">169</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> static fn get_class_name() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">170</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return "Base";</pre></td>
</tr><tr class="code-line">
<td class="line-num">171</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">172</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">173</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">174</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Derived extends Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">175</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> static fn get_class_name() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">176</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return super.get_class_name() + "_Derived";</pre></td>
</tr><tr class="code-line">
<td class="line-num">177</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">178</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">179</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">180</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(Derived.get_class_name(), "Base_Derived");</pre></td>
</tr><tr class="code-line">
<td class="line-num">181</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">182</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">183</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("super with static method inheritance", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">184</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Logger {</pre></td>
</tr><tr class="code-line">
<td class="line-num">185</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> static fn level() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">186</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return "INFO";</pre></td>
</tr><tr class="code-line">
<td class="line-num">187</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">188</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">189</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">190</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class DebugLogger extends Logger {</pre></td>
</tr><tr class="code-line">
<td class="line-num">191</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">192</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">193</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(DebugLogger.level(), "INFO");</pre></td>
</tr><tr class="code-line">
<td class="line-num">194</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">195</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">196</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("super in multiple inheritance levels", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">197</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Level1 {</pre></td>
</tr><tr class="code-line">
<td class="line-num">198</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn level() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">199</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return 1;</pre></td>
</tr><tr class="code-line">
<td class="line-num">200</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">201</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">202</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">203</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Level2 extends Level1 {</pre></td>
</tr><tr class="code-line">
<td class="line-num">204</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn level() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">205</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return super.level() + 10;</pre></td>
</tr><tr class="code-line">
<td class="line-num">206</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">207</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">208</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">209</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Level3 extends Level2 {</pre></td>
</tr><tr class="code-line">
<td class="line-num">210</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn level() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">211</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return super.level() + 100;</pre></td>
</tr><tr class="code-line">
<td class="line-num">212</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">213</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">214</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">215</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Level3().level(), 111);</pre></td>
</tr><tr class="code-line">
<td class="line-num">216</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">217</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>});</pre></td>
</tr><tr class="code-line">
<td class="line-num">218</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">219</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>describe("this Keyword", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">220</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("this.field access in methods", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">221</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Point {</pre></td>
</tr><tr class="code-line">
<td class="line-num">222</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> x: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">223</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> y: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">224</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">225</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> new(x: Int, y: Int) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">226</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.x = x;</pre></td>
</tr><tr class="code-line">
<td class="line-num">227</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.y = y;</pre></td>
</tr><tr class="code-line">
<td class="line-num">228</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">229</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">230</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn get_x() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">231</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this.x;</pre></td>
</tr><tr class="code-line">
<td class="line-num">232</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">233</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">234</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn get_y() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">235</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this.y;</pre></td>
</tr><tr class="code-line">
<td class="line-num">236</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">237</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">238</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">239</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let p = new Point(5, 10);</pre></td>
</tr><tr class="code-line">
<td class="line-num">240</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(p.get_x(), 5);</pre></td>
</tr><tr class="code-line">
<td class="line-num">241</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(p.get_y(), 10);</pre></td>
</tr><tr class="code-line">
<td class="line-num">242</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">243</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">244</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("this.method() calls", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">245</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Chainer {</pre></td>
</tr><tr class="code-line">
<td class="line-num">246</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> value: Int = 0;</pre></td>
</tr><tr class="code-line">
<td class="line-num">247</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">248</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn add(n: Int) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">249</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.value = this.value + n;</pre></td>
</tr><tr class="code-line">
<td class="line-num">250</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this;</pre></td>
</tr><tr class="code-line">
<td class="line-num">251</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">252</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">253</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn multiply(n: Int) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">254</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.value = this.value * n;</pre></td>
</tr><tr class="code-line">
<td class="line-num">255</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this;</pre></td>
</tr><tr class="code-line">
<td class="line-num">256</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">257</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">258</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn reset() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">259</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.value = 0;</pre></td>
</tr><tr class="code-line">
<td class="line-num">260</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this;</pre></td>
</tr><tr class="code-line">
<td class="line-num">261</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">262</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">263</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">264</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let c = new Chainer();</pre></td>
</tr><tr class="code-line">
<td class="line-num">265</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(c.add(5).multiply(2).value, 10);</pre></td>
</tr><tr class="code-line">
<td class="line-num">266</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(c.reset().add(3).value, 3);</pre></td>
</tr><tr class="code-line">
<td class="line-num">267</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">268</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">269</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("this in constructor", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">270</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Box {</pre></td>
</tr><tr class="code-line">
<td class="line-num">271</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> width: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">272</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> height: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">273</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> depth: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">274</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">275</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> new(w: Int, h: Int, d: Int) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">276</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.width = w;</pre></td>
</tr><tr class="code-line">
<td class="line-num">277</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.height = h;</pre></td>
</tr><tr class="code-line">
<td class="line-num">278</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.depth = d;</pre></td>
</tr><tr class="code-line">
<td class="line-num">279</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">280</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">281</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn volume() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">282</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this.width * this.height * this.depth;</pre></td>
</tr><tr class="code-line">
<td class="line-num">283</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">284</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">285</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">286</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let box = new Box(2, 3, 4);</pre></td>
</tr><tr class="code-line">
<td class="line-num">287</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(box.volume(), 24);</pre></td>
</tr><tr class="code-line">
<td class="line-num">288</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">289</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">290</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("this in nested method calls", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">291</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Outer {</pre></td>
</tr><tr class="code-line">
<td class="line-num">292</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> value: Int = 100;</pre></td>
</tr><tr class="code-line">
<td class="line-num">293</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">294</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">295</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let o = new Outer();</pre></td>
</tr><tr class="code-line">
<td class="line-num">296</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(o.value, 100);</pre></td>
</tr><tr class="code-line">
<td class="line-num">297</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">298</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">299</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("this in static context throws error", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">300</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let threw = false;</pre></td>
</tr><tr class="code-line">
<td class="line-num">301</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> try {</pre></td>
</tr><tr class="code-line">
<td class="line-num">302</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Test {</pre></td>
</tr><tr class="code-line">
<td class="line-num">303</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> static fn bad() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">304</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this;</pre></td>
</tr><tr class="code-line">
<td class="line-num">305</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">306</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">307</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> Test.bad();</pre></td>
</tr><tr class="code-line">
<td class="line-num">308</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> } catch (e) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">309</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> threw = true;</pre></td>
</tr><tr class="code-line">
<td class="line-num">310</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">311</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert(threw);</pre></td>
</tr><tr class="code-line">
<td class="line-num">312</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">313</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>});</pre></td>
</tr><tr class="code-line">
<td class="line-num">314</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">315</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>describe("Method Overriding", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">316</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("method override completely replaces super", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">317</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">318</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn get_value() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">319</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return 1;</pre></td>
</tr><tr class="code-line">
<td class="line-num">320</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">321</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">322</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">323</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Derived extends Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">324</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn get_value() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">325</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return 2;</pre></td>
</tr><tr class="code-line">
<td class="line-num">326</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">327</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">328</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">329</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Base().get_value(), 1);</pre></td>
</tr><tr class="code-line">
<td class="line-num">330</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Derived().get_value(), 2);</pre></td>
</tr><tr class="code-line">
<td class="line-num">331</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">332</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">333</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("override with super call", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">334</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">335</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn compute(x: Int) -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">336</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return x * 2;</pre></td>
</tr><tr class="code-line">
<td class="line-num">337</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">338</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">339</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">340</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Derived extends Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">341</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn compute(x: Int) -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">342</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let result = super.compute(x);</pre></td>
</tr><tr class="code-line">
<td class="line-num">343</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return result + 1;</pre></td>
</tr><tr class="code-line">
<td class="line-num">344</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">345</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">346</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">347</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Derived().compute(5), 11);</pre></td>
</tr><tr class="code-line">
<td class="line-num">348</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">349</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">350</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("override with different signature", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">351</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">352</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn process(data: String) -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">353</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return "processed: " + data;</pre></td>
</tr><tr class="code-line">
<td class="line-num">354</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">355</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">356</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">357</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Derived extends Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">358</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn process(data: String, prefix: String) -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">359</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return prefix + ": " + data;</pre></td>
</tr><tr class="code-line">
<td class="line-num">360</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">361</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">362</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">363</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Base().process("test"), "processed: test");</pre></td>
</tr><tr class="code-line">
<td class="line-num">364</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">365</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">366</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("override adds new methods", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">367</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">368</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn existing() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">369</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return "exists";</pre></td>
</tr><tr class="code-line">
<td class="line-num">370</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">371</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">372</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">373</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Derived extends Base {</pre></td>
</tr><tr class="code-line">
<td class="line-num">374</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn new_method() -> String {</pre></td>
</tr><tr class="code-line">
<td class="line-num">375</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return "new";</pre></td>
</tr><tr class="code-line">
<td class="line-num">376</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">377</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">378</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">379</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let d = new Derived();</pre></td>
</tr><tr class="code-line">
<td class="line-num">380</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(d.existing(), "exists");</pre></td>
</tr><tr class="code-line">
<td class="line-num">381</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(d.new_method(), "new");</pre></td>
</tr><tr class="code-line">
<td class="line-num">382</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">383</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>});</pre></td>
</tr><tr class="code-line">
<td class="line-num">384</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">385</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>describe("Constructor Behavior", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">386</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("default constructor when no new defined", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">387</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Simple {</pre></td>
</tr><tr class="code-line">
<td class="line-num">388</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> value: Int = 42;</pre></td>
</tr><tr class="code-line">
<td class="line-num">389</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">390</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">391</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let s = new Simple();</pre></td>
</tr><tr class="code-line">
<td class="line-num">392</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(s.value, 42);</pre></td>
</tr><tr class="code-line">
<td class="line-num">393</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">394</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">395</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("custom constructor", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">396</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Rectangle {</pre></td>
</tr><tr class="code-line">
<td class="line-num">397</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> width: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">398</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> height: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">399</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">400</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> new(w: Int, h: Int) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">401</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.width = w;</pre></td>
</tr><tr class="code-line">
<td class="line-num">402</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.height = h;</pre></td>
</tr><tr class="code-line">
<td class="line-num">403</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">404</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">405</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn area() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">406</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this.width * this.height;</pre></td>
</tr><tr class="code-line">
<td class="line-num">407</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">408</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">409</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">410</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> let r = new Rectangle(5, 3);</pre></td>
</tr><tr class="code-line">
<td class="line-num">411</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(r.area(), 15);</pre></td>
</tr><tr class="code-line">
<td class="line-num">412</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">413</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">414</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> test("constructor with default parameters", fn() {</pre></td>
</tr><tr class="code-line">
<td class="line-num">415</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> class Box {</pre></td>
</tr><tr class="code-line">
<td class="line-num">416</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> width: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">417</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> height: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">418</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> depth: Int;</pre></td>
</tr><tr class="code-line">
<td class="line-num">419</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">420</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> new(w: Int, h: Int = 1, d: Int = 1) {</pre></td>
</tr><tr class="code-line">
<td class="line-num">421</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.width = w;</pre></td>
</tr><tr class="code-line">
<td class="line-num">422</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.height = h;</pre></td>
</tr><tr class="code-line">
<td class="line-num">423</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> this.depth = d;</pre></td>
</tr><tr class="code-line">
<td class="line-num">424</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">425</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">426</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> fn volume() -> Int {</pre></td>
</tr><tr class="code-line">
<td class="line-num">427</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> return this.width * this.height * this.depth;</pre></td>
</tr><tr class="code-line">
<td class="line-num">428</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">429</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> }</pre></td>
</tr><tr class="code-line">
<td class="line-num">430</td>
<td class="line-indicator"></td>
<td class="code-content"><pre></pre></td>
</tr><tr class="code-line">
<td class="line-num">431</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Box(2).volume(), 2);</pre></td>
</tr><tr class="code-line">
<td class="line-num">432</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Box(2, 3).volume(), 6);</pre></td>
</tr><tr class="code-line">
<td class="line-num">433</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> assert_eq(new Box(2, 3, 4).volume(), 24);</pre></td>
</tr><tr class="code-line">
<td class="line-num">434</td>
<td class="line-indicator"></td>
<td class="code-content"><pre> });</pre></td>
</tr><tr class="code-line">
<td class="line-num">435</td>
<td class="line-indicator"></td>
<td class="code-content"><pre>});</pre></td>
</tr>
</tbody>
</table>
</section>
</div>
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