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LibJS: Convert Proxy tests

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Matthew Olsson 2020-07-03 22:43:08 -07:00 • committed by Andreas Kling
parent b86faeaeef
commit 449a1cf3a2
14 changed files with 820 additions and 815 deletions
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72
Libraries/LibJS/Tests/builtins/Proxy/Proxy.handler-apply.js
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@ -1,39 +1,37 @@
load("test-common.js");
try {
let p = new Proxy(() => 5, { apply: null });
assert(p() === 5);
let p = new Proxy(() => 5, { apply: undefined });
assert(p() === 5);
let p = new Proxy(() => 5, {});
assert(p() === 5);
const f = (a, b) => a + b;
const handler = {
apply(target, this_, arguments) {
assert(target === f);
assert(this_ === handler);
if (arguments[2])
return arguments[0] * arguments[1];
return f(...arguments);
},
};
p = new Proxy(f, handler);
assert(p(2, 4) === 6);
assert(p(2, 4, true) === 8);
// Invariants
[{}, [], new Proxy({}, {})].forEach(item => {
assertThrowsError(() => {
new Proxy(item, {})();
}, {
error: TypeError,
message: "[object ProxyObject] is not a function",
});
describe("[[Call]] trap normal behavior", () => {
test("forwarding when not defined in handler", () => {
let p = new Proxy(() => 5, { apply: null });
expect(p()).toBe(5);
p = new Proxy(() => 5, { apply: undefined });
expect(p()).toBe(5);
p = new Proxy(() => 5, {});
expect(p()).toBe(5);
});
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}
test("correct arguments supplied to trap", () => {
const f = (a, b) => a + b;
const handler = {
apply(target, this_, arguments) {
expect(target).toBe(f);
expect(this_).toBe(handler);
if (arguments[2])
return arguments[0] * arguments[1];
return f(...arguments);
},
};
p = new Proxy(f, handler);
expect(p(2, 4)).toBe(6);
expect(p(2, 4, true)).toBe(8);
});
});
describe("[[Call]] invariants", () => {
test("target must have a [[Call]] slot", () => {
[{}, [], new Proxy({}, {})].forEach(item => {
expect(() => {
new Proxy(item, {})();
}).toThrowWithMessage(TypeError, "[object ProxyObject] is not a function");
});
});
});