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ant/tests/test_gc_comprehensive.js
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test_gc_comprehensive.js
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console.log('=== Comprehensive GC Test ===');
console.log('Starting...\n');
function fmt(bytes) {
if (bytes < 1024) return bytes + ' B';
if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(2) + ' KB';
return (bytes / 1024 / 1024).toFixed(2) + ' MB';
}
let failures = 0;
function assert(condition, msg) {
if (!condition) {
console.log('FAIL:', msg);
failures = failures + 1;
}
}
// Test 1: Basic objects and arrays survive GC
console.log('Test 1: Objects and Arrays');
let obj1 = { name: 'test', value: 42, nested: { deep: 'value' } };
let arr1 = [1, 2, 3, { inner: 'object' }, 'string'];
assert(obj1.name === 'test', 'obj1.name should be "test"');
assert(obj1.nested.deep === 'value', 'nested object should survive');
assert(arr1.length === 5, 'array length should be 5');
assert(arr1[3].inner === 'object', 'array nested object should survive');
console.log(' Objects and arrays: OK\n');
// Test 2: Map survives GC
console.log('Test 2: Map');
let map = new Map();
map.set('key1', { data: 'value1' });
map.set('key2', [1, 2, 3]);
map.set('key3', 'simple string');
assert(map.get('key1').data === 'value1', 'map value object should survive');
assert(map.get('key2')[1] === 2, 'map value array should survive');
assert(map.get('key3') === 'simple string', 'map value string should survive');
assert(map.size === 3, 'map size should be 3');
console.log(' Map: OK\n');
// Test 3: Set survives GC
console.log('Test 3: Set');
let set = new Set();
let setObj = { id: 123 };
set.add('value1');
set.add(42);
set.add(setObj);
assert(set.has('value1'), 'set should have "value1"');
assert(set.has(42), 'set should have 42');
assert(set.size === 3, 'set size should be 3');
console.log(' Set: OK\n');
// Test 4: Property descriptors (getters/setters) survive GC
console.log('Test 4: Property Descriptors');
let descObj = {};
let _hidden = 'initial';
Object.defineProperty(descObj, 'prop', {
get: function () {
return _hidden;
},
set: function (v) {
_hidden = v;
},
enumerable: true,
configurable: true
});
descObj.prop = 'updated';
assert(descObj.prop === 'updated', 'getter should return updated value');
descObj.prop = 'after gc';
assert(descObj.prop === 'after gc', 'setter should work after GC');
console.log(' Property descriptors: OK\n');
// Test 5: Promises survive GC
console.log('Test 5: Promises');
let promiseResolved = false;
let promiseValue = null;
let p = new Promise(resolve => {
resolve({ result: 'success' });
});
p.then(val => {
promiseResolved = true;
promiseValue = val;
});
console.log(' Waiting for promise...');
// Test 6: Proxy survives GC
console.log('Test 6: Proxy');
let proxyTarget = { x: 10, y: 20 };
let proxyHandler = {
get: function (target, prop) {
if (prop === 'sum') return target.x + target.y;
return target[prop];
}
};
let proxy = new Proxy(proxyTarget, proxyHandler);
assert(proxy.x === 10, 'proxy.x should be 10');
assert(proxy.y === 20, 'proxy.y should be 20');
assert(proxy.sum === 30, 'proxy.sum should be 30');
console.log(' Proxy: OK\n');
// Test 7: Closures survive GC
console.log('Test 7: Closures');
function makeCounter() {
let count = 0;
return {
inc: function () {
count = count + 1;
return count;
},
get: function () {
return count;
}
};
}
let counter = makeCounter();
counter.inc();
counter.inc();
assert(counter.get() === 2, 'closure should preserve count');
counter.inc();
assert(counter.get() === 3, 'closure should work after GC');
console.log(' Closures: OK\n');
// Test 8: Multiple GC cycles
console.log('Test 8: Multiple GC Cycles');
let cycleData = { iteration: 0 };
for (let i = 0; i < 5; i = i + 1) {
cycleData.iteration = i;
cycleData['data' + i] = { value: i * 10 };
}
assert(cycleData.iteration === 4, 'iteration should be 4');
assert(cycleData.data3.value === 30, 'data3.value should be 30');
console.log(' Multiple cycles: OK\n');
// Test 9: Large allocations + GC
console.log('Test 9: Large Allocations');
let largeArr = [];
for (let i = 0; i < 1000; i = i + 1) {
largeArr.push({ index: i, data: 'item ' + i });
}
let statsBefore = Ant.stats();
let statsAfter = Ant.stats();
assert(largeArr.length === 1000, 'large array should have 1000 elements');
assert(largeArr[500].index === 500, 'element 500 should be correct');
assert(largeArr[999].data === 'item 999', 'last element should be correct');
console.log(' Large allocations: OK');
console.log(' arenaUsed before:', fmt(statsBefore.arenaUsed), 'after:', fmt(statsAfter.arenaUsed), '\n');
// Test 10: Nested structures
console.log('Test 10: Nested Structures');
let nested = {
level1: {
level2: {
level3: {
level4: {
value: 'deep'
}
}
}
}
};
let nestedArr = [[[[['innermost']]]]];
assert(nested.level1.level2.level3.level4.value === 'deep', 'deep nesting should survive');
assert(nestedArr[0][0][0][0][0] === 'innermost', 'nested array should survive');
console.log(' Nested structures: OK\n');
// Summary
console.log('=== Test Summary ===');
if (failures === 0) {
console.log('All tests passed!');
} else {
console.log('Failures:', failures);
}
// Test async separately (needs event loop)
console.log('\n=== Async GC Test ===');
async function testAsyncGC() {
let asyncData = { value: 'before await' };
await new Promise(resolve => setTimeout(resolve, 10));
asyncData.value = 'after first await';
await new Promise(resolve => setTimeout(resolve, 10));
assert(asyncData.value === 'after first await', 'async data should survive await');
console.log(' Async GC: OK');
return 'async complete';
}
testAsyncGC().then(result => {
console.log(' Result:', result);
console.log('\n=== All Tests Complete ===');
});

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