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ant/tests/test-catch-destructuring.js
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test-catch-destructuring.js
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// ============================================
// TEST: catch with destructuring not supported
// ============================================
// Bug: catch ({ prop }) and catch ([a, b]) fail with SyntaxError
// ============================================
console.log("=== CATCH DESTRUCTURING TESTS ===\n");
// --- BASELINE (should work) ---
console.log("1. catch with simple identifier:");
try {
throw new Error("test error");
} catch (e) {
console.log(" caught: " + e.message);
}
console.log(" PASSED\n");
console.log("2. catch without parameter (ES2019):");
try {
throw new Error("ignored");
} catch {
console.log(" caught without param");
}
console.log(" PASSED\n");
console.log("3. catch with manual destructuring (workaround):");
try {
throw { message: "manual", code: 42 };
} catch (e) {
const { message, code } = e;
console.log(" message: " + message + ", code: " + code);
}
console.log(" PASSED\n");
console.log("4. catch with manual array destructuring (workaround):");
try {
throw [1, 2, 3];
} catch (e) {
const [a, b, c] = e;
console.log(" a: " + a + ", b: " + b + ", c: " + c);
}
console.log(" PASSED\n");
// --- BUG TESTS (these should work per ES6 but fail in Ant) ---
console.log("5. catch with object destructuring:");
console.log(" expected: works per ES6 spec");
try {
throw { message: "destructured", code: 99 };
} catch ({ message, code }) {
console.log(" message: " + message + ", code: " + code);
}
console.log(" PASSED\n");
console.log("6. catch with array destructuring:");
console.log(" expected: works per ES6 spec");
try {
throw [10, 20];
} catch ([a, b]) {
console.log(" a: " + a + ", b: " + b);
}
console.log(" PASSED\n");
console.log("7. catch with nested object destructuring:");
try {
throw { outer: { inner: "value" } };
} catch ({ outer: { inner } }) {
console.log(" inner: " + inner);
}
console.log(" PASSED\n");
console.log("8. catch with default values:");
try {
throw { a: 1 };
} catch ({ a, b = 99 }) {
console.log(" a: " + a + ", b: " + b);
}
console.log(" PASSED\n");
console.log("9. catch with renaming:");
try {
throw { longPropertyName: "short" };
} catch ({ longPropertyName: short }) {
console.log(" short: " + short);
}
console.log(" PASSED\n");
console.log("10. catch with rest pattern:");
try {
throw [1, 2, 3, 4, 5];
} catch ([first, ...rest]) {
console.log(" first: " + first + ", rest: " + rest);
}
console.log(" PASSED\n");
console.log("=== ALL TESTS PASSED ===");

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