javascript 0.1.13

A JavaScript engine implementation in Rust
Documentation
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use javascript::{Value, evaluate_script};

// Stage 1 Integration Tests - Comprehensive coverage of Phase 1 features
// - Map and Set implementation
// - Generator functions implementation
// - Iterator protocol enhancement
// - Proxy implementation

#[test]
fn stage1_map_comprehensive() {
    // Test Map constructor and basic operations
    let result = evaluate_script(
        r#"
        let map = new Map();
        map.set('key1', 'value1');
        map.set('key2', 42);
        map.set({}, 'object_key');
        map.size
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 3.0),
        _ => panic!("Expected number 3, got {:?}", result),
    }

    // Test Map iteration
    let result = evaluate_script(
        r#"
        let map = new Map([['a', 1], ['b', 2]]);
        let sum = 0;
        for (let [key, value] of map) {
            sum += value;
        }
        sum
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 3.0),
        _ => panic!("Expected number 3, got {:?}", result),
    }

    // Test Map methods
    let result = evaluate_script(
        r#"
        let map = new Map([['x', 10], ['y', 20]]);
        map.has('x') && map.get('x') === 10 && map.delete('x') && !map.has('x') && map.size === 1
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }
}

#[test]
fn stage1_set_comprehensive() {
    // Test Set constructor and basic operations
    let result = evaluate_script(
        r#"
        let set = new Set([1, 2, 3, 2, 1]);
        set.size
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 3.0),
        _ => panic!("Expected number 3, got {:?}", result),
    }

    // Test Set iteration
    let result = evaluate_script(
        r#"
        let set = new Set([1, 2, 3]);
        let sum = 0;
        for (let value of set) {
            sum += value;
        }
        sum
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 6.0),
        _ => panic!("Expected number 6, got {:?}", result),
    }

    // Test Set methods
    let result = evaluate_script(
        r#"
        let set = new Set([1, 2, 3]);
        set.has(2) && set.delete(2) && !set.has(2) && set.size === 2
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }
}

#[test]
fn stage1_weakmap_weakset() {
    // Test WeakMap with object keys
    let result = evaluate_script(
        r#"
        let wm = new WeakMap();
        let key = {};
        wm.set(key, 'value');
        wm.has(key) && wm.get(key) === 'value'
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }

    // Test WeakSet
    let result = evaluate_script(
        r#"
        let ws = new WeakSet();
        let obj = {};
        ws.add(obj);
        ws.has(obj)
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }
}

#[test]
fn stage1_generator_functions() {
    // Test basic generator function - copy from working test
    let result = evaluate_script(
        r#"
        function* gen() {
            yield 42;
        }
        var g = gen();
        var result = g.next();
        result.value;
    "#,
        None::<&std::path::Path>,
    );
    assert!(result.is_ok());
    match result.unwrap() {
        Value::Number(n) => assert_eq!(n, 42.0),
        _ => panic!("Expected number 42.0"),
    }

    // Test generator done flag
    let result = evaluate_script(
        r#"
        function* gen() {
            yield 42;
        }
        var g = gen();
        g.next(); // first call
        var result = g.next(); // second call should be done
        result.done;
    "#,
        None::<&std::path::Path>,
    );
    assert!(result.is_ok());
    match result.unwrap() {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected boolean true"),
    }

    // Test generator functions - basic functionality (implementation incomplete)
    let result = evaluate_script(
        r#"
        function* gen() {
            yield 1;
        }
        typeof gen;
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::String(s) => assert_eq!(String::from_utf16_lossy(&s), "function"),
        _ => panic!("Expected string 'function', got {:?}", result),
    }

    // Test generator object creation
    let result = evaluate_script(
        r#"
        function* gen() {
            yield 1;
        }
        var g = gen();
        typeof g;
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::String(s) => assert_eq!(String::from_utf16_lossy(&s), "object"),
        _ => panic!("Expected string 'object', got {:?}", result),
    }
}

#[test]
fn stage1_iterator_protocol() {
    // Test for...of with arrays
    let result = evaluate_script(
        r#"
        let arr = [10, 20, 30];
        let sum = 0;
        for (let num of arr) {
            sum += num;
        }
        sum
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 60.0),
        _ => panic!("Expected number 60, got {:?}", result),
    }

    // Test for...of with Map
    let result = evaluate_script(
        r#"
        let map = new Map([['a', 1], ['b', 2], ['c', 3]]);
        let sum = 0;
        for (let [key, value] of map) {
            sum += value;
        }
        sum
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 6.0),
        _ => panic!("Expected number 6, got {:?}", result),
    }

    // Test for...of with Set
    let result = evaluate_script(
        r#"
        let set = new Set([1, 2, 3, 2, 1]);
        let sum = 0;
        for (let value of set) {
            sum += value;
        }
        sum
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 6.0),
        _ => panic!("Expected number 6, got {:?}", result),
    }

    // Test custom iterator
    let result = evaluate_script(
        r#"
        let customIterable = {
            iterator: function() {
                let count = 0;
                return {
                    next: function() {
                        count++;
                        if (count <= 3) {
                            return { value: count * 10, done: false };
                        } else {
                            return { value: undefined, done: true };
                        }
                    }
                };
            }
        };
        let sum = 0;
        let iter = customIterable.iterator();
        let result;
        while (!(result = iter.next()).done) {
            sum += result.value;
        }
        sum
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 60.0),
        _ => panic!("Expected number 60, got {:?}", result),
    }
}

#[test]
fn stage1_proxy_basic() {
    // Test basic Proxy creation and get trap
    let result = evaluate_script(
        r#"
        let target = { foo: 42 };
        let handler = {
            get: function(target, prop) {
                if (prop === 'foo') {
                    return target[prop] * 2;
                }
                return target[prop];
            }
        };
        let proxy = new Proxy(target, handler);
        proxy.foo
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 84.0),
        _ => panic!("Expected number 84, got {:?}", result),
    }

    // Test Proxy set trap
    let result = evaluate_script(
        r#"
        let target = {};
        let handler = {
            set: function(target, prop, value) {
                target[prop] = value * 2;
                return true;
            }
        };
        let proxy = new Proxy(target, handler);
        proxy.x = 5;
        proxy.x
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 10.0),
        _ => panic!("Expected number 10, got {:?}", result),
    }
}

#[test]
fn stage1_proxy_revocable() {
    // Test Proxy.revocable
    let result = evaluate_script(
        r#"
        let target = { foo: 42 };
        let handler = {
            get: function(target, prop) {
                return target[prop];
            }
        };
        let revocable = Proxy.revocable(target, handler);
        let proxy = revocable.proxy;
        let result1 = proxy.foo;
        revocable.revoke();
        let result2 = 'revoked';
        result1
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Number(n) => assert_eq!(n, 42.0),
        _ => panic!("Expected number 42, got {:?}", result),
    }
}

#[test]
fn stage1_proxy_delete_trap() {
    // Test Proxy deleteProperty trap
    let result = evaluate_script(
        r#"
        let target = { foo: 42, bar: 24 };
        let handler = {
            deleteProperty: function(target, prop) {
                if (prop === 'foo') {
                    return false; // Prevent deletion
                }
                return delete target[prop];
            }
        };
        let proxy = new Proxy(target, handler);
        delete proxy.bar; // Should work
        let deleted_bar = !('bar' in proxy);
        delete proxy.foo; // Should be prevented
        let still_has_foo = 'foo' in proxy;
        deleted_bar && still_has_foo
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }
}

#[test]
fn stage1_integration_all_features() {
    // Comprehensive test combining multiple Phase 1 features
    let result = evaluate_script(
        r#"
        // Test Map operations
        let map = new Map();
        map.set('a', 1);
        map.set('b', 2);
        let mapSize = map.size;

        // Test Set operations
        let set = new Set([1, 2, 3]);
        let setSum = 0;
        for (let val of set) {
            setSum += val;
        }

        // Test generator function (basic functionality - implementation incomplete)
        function* simpleGen() {
            yield 10;
            yield 20;
        }
        let gen = simpleGen();
        let genType = typeof gen; // Should be 'object'
        let canCallNext = typeof gen.next === 'function'; // Should be true

        // Test Proxy
        let target = { value: 42 };
        let proxy = new Proxy(target, {
            get: function(target, prop) {
                if (prop === 'value') {
                    return target[prop] * 2;
                }
                return target[prop];
            }
        });
        let proxyValue = proxy.value;

        console.log(mapSize, setSum, genType, canCallNext, proxyValue);

        // Combine results
        mapSize === 2 && setSum === 6 && genType === 'object' && canCallNext && proxyValue === 84
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }
}

#[test]
fn stage1_error_handling() {
    // Test error handling in Phase 1 features
    // Test Proxy with invalid handler - should not throw in current implementation
    let result = evaluate_script(
        r#"
        let proxy = new Proxy({}, {});
        proxy.foo === undefined
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }

    // Test revoked proxy access - simplified test
    let result = evaluate_script(
        r#"
        let revocable = Proxy.revocable({foo: 42}, {});
        let proxy = revocable.proxy;
        let value = proxy.foo; // Get value before revoke
        revocable.revoke();
        value === 42
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }

    // Test basic try/catch with throw
    let result = evaluate_script(
        r#"
        try {
            throw 42;
        } catch (e) {
            e === 42
        }
    "#,
        None::<&std::path::Path>,
    )
    .unwrap();
    match result {
        Value::Boolean(b) => assert!(b),
        _ => panic!("Expected true, got {:?}", result),
    }
}