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<h1>pipeline_spec.sl</h1>
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<td class="code-content"><pre>// ============================================================================</pre></td>
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<td class="code-content"><pre>// Pipeline Operator 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("Pipeline Operator", fn() {</pre></td>
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<td class="code-content"><pre> test("basic pipeline", fn() {</pre></td>
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<td class="code-content"><pre> fn double(x) { return x * 2; }</pre></td>
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<td class="line-num">8</td>
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<td class="code-content"><pre> fn addOne(x) { return x + 1; }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> let result = 5 |> double();</pre></td>
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<td class="code-content"><pre> assert_eq(result, 10);</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> test("chained pipeline", fn() {</pre></td>
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<td class="code-content"><pre> fn double(x) { return x * 2; }</pre></td>
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<td class="code-content"><pre> fn addTen(x) { return x + 10; }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> let result = 5 |> double() |> addTen();</pre></td>
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<td class="code-content"><pre> assert_eq(result, 20);</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> test("pipeline with method call", fn() {</pre></td>
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<td class="code-content"><pre> let result = "hello" |> upcase();</pre></td>
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<td class="code-content"><pre> assert_eq(result, "HELLO");</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> test("pipeline with custom function", fn() {</pre></td>
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<td class="code-content"><pre> fn square(x) { return x * x; }</pre></td>
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<td class="code-content"><pre> fn toString(x) { return str(x); }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> let result = 5 |> square() |> toString();</pre></td>
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<td class="line-num">32</td>
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<td class="code-content"><pre> assert_eq(result, "25");</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> test("pipeline with multiple transformations", fn() {</pre></td>
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<td class="code-content"><pre> fn add(x, n) { return x + n; }</pre></td>
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<td class="code-content"><pre> fn multiply(x, n) { return x * n; }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> let result = 2 |> add(3) |> multiply(4);</pre></td>
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<td class="code-content"><pre> assert_eq(result, 20);</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> test("pipeline preserves types", fn() {</pre></td>
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<td class="code-content"><pre> fn get_len(s) { return len(s); }</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="code-content"><pre> let result = "hello" |> get_len();</pre></td>
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<td class="code-content"><pre> assert_eq(result, 5);</pre></td>
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<td class="code-content"><pre> assert_eq(type(result), "int");</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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