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ant/tests/test_property_cache_deletion.cjs
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test_property_cache_deletion.cjs
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// Test: Property cache invalidation on deletion
console.log("=== Test 1: Mid-chain deletion ===");
{
let obj = { a: 1, b: 2, c: 3 };
console.log("obj.b before:", obj.b); // populate cache
delete obj.b;
console.log("obj.b after delete:", obj.b); // should be undefined
console.log("PASS:", obj.b === undefined);
}
console.log("\n=== Test 2: First property deletion ===");
{
let obj = {};
obj.a = 1;
obj.b = 2;
obj.c = 3; // c is first in chain (newest)
console.log("obj.c before:", obj.c);
delete obj.c;
console.log("obj.c after delete:", obj.c);
console.log("PASS:", obj.c === undefined);
}
console.log("\n=== Test 3: Last property deletion ===");
{
let obj = {};
obj.a = 1; // a is last in chain (oldest)
obj.b = 2;
obj.c = 3;
console.log("obj.a before:", obj.a);
delete obj.a;
console.log("obj.a after delete:", obj.a);
console.log("PASS:", obj.a === undefined);
}
console.log("\n=== Test 4: Multiple deletions ===");
{
let obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
obj.b; obj.c; obj.d; // populate cache
delete obj.c;
delete obj.b;
delete obj.d;
console.log("PASS:", obj.b === undefined && obj.c === undefined && obj.d === undefined);
console.log("a still exists:", obj.a === 1);
console.log("e still exists:", obj.e === 5);
}
console.log("\n=== Test 5: Delete and re-add ===");
{
let obj = { a: 1, b: 2, c: 3 };
obj.b; // cache
delete obj.b;
console.log("after delete:", obj.b);
obj.b = 999;
console.log("after re-add:", obj.b);
console.log("PASS:", obj.b === 999);
}
console.log("\n=== Test 6: In-place update doesnt break cache ===");
{
let obj = { a: 1, b: 2, c: 3 };
obj.b; // cache
obj.b = 100; // in-place update
obj.b = 200; // another update
console.log("obj.b:", obj.b);
console.log("PASS:", obj.b === 200);
}
console.log("\n=== Test 7: Many properties stress test ===");
{
let obj = {};
for (let i = 0; i < 100; i++) {
obj["prop" + i] = i;
}
// Access some to populate cache
obj.prop50; obj.prop25; obj.prop75;
// Delete from various positions
delete obj.prop50;
delete obj.prop25;
delete obj.prop75;
delete obj.prop0; // last in chain
delete obj.prop99; // first in chain
console.log("PASS:",
obj.prop50 === undefined &&
obj.prop25 === undefined &&
obj.prop75 === undefined &&
obj.prop0 === undefined &&
obj.prop99 === undefined &&
obj.prop1 === 1 &&
obj.prop98 === 98
);
}
console.log("\n=== Test 8: Delete non-existent (should not crash) ===");
{
let obj = { a: 1 };
obj.a; // cache
delete obj.nonexistent; // should be no-op
console.log("PASS:", obj.a === 1);
}
console.log("\n=== Test 9: Repeated access after delete ===");
{
let obj = { a: 1, b: 2, c: 3 };
obj.b; obj.b; obj.b; // multiple cache hits
delete obj.b;
let results = [obj.b, obj.b, obj.b]; // multiple accesses after delete
console.log("PASS:", results.every(x => x === undefined));
}
console.log("\n=== Test 10: Array element deletion ===");
{
let arr = [1, 2, 3, 4, 5];
arr[2]; // cache
delete arr[2];
console.log("arr[2]:", arr[2]);
console.log("PASS:", arr[2] === undefined && arr.length === 5);
}
console.log("\n=== All tests complete ===");

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