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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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92
Libraries/LibJS/Tests/builtins/Proxy/Proxy.handler-preventExtensions.js
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@ -1,55 +1,53 @@
load("test-common.js");
try {
let p = new Proxy({}, { preventExtensions: null });
assert(Object.preventExtensions(p) === p);
p = new Proxy({}, { preventExtensions: undefined });
assert(Object.preventExtensions(p) === p);
p = new Proxy({}, {});
assert(Object.preventExtensions(p) == p);
let o = {};
p = new Proxy(o, {
preventExtensions(target) {
assert(target === o);
return true;
}
describe("[[PreventExtension]] trap normal behavior", () => {
test("forwarding when not defined in handler", () => {
let p = new Proxy({}, { preventExtensions: null });
expect(Object.preventExtensions(p)).toBe(p);
p = new Proxy({}, { preventExtensions: undefined });
expect(Object.preventExtensions(p)).toBe(p);
p = new Proxy({}, {});
expect(Object.preventExtensions(p)).toBe(p);
});
Object.preventExtensions(o);
Object.preventExtensions(p);
test("correct arguments supplied to trap", () => {
let o = {};
p = new Proxy(o, {
preventExtensions(target) {
expect(target).toBe(o);
return true;
}
});
// Invariants
p = new Proxy({}, {
preventExtensions() {
return false;
},
});
assertThrowsError(() => {
Object.preventExtensions(o);
Object.preventExtensions(p);
}, {
error: TypeError,
message: "Object's [[PreventExtensions]] method returned false",
});
});
describe("[[PreventExtensions]] invariants", () => {
test("cannot return false", () => {
let p = new Proxy({}, {
preventExtensions() {
return false;
},
});
expect(() => {
Object.preventExtensions(p);
}).toThrowWithMessage(TypeError, "Object's [[PreventExtensions]] method returned false");
});
o = {};
p = new Proxy(o, {
preventExtensions() {
return true;
},
});
assertThrowsError(() => {
Object.preventExtensions(p);
}, {
error: TypeError,
message: "Proxy handler's preventExtensions trap violates invariant: cannot return true if the target object is extensible"
});
test("cannot return true if the target is extensible", () => {
let o = {};
let p = new Proxy(o, {
preventExtensions() {
return true;
},
});
Object.preventExtensions(o);
assert(Object.preventExtensions(p) === p);
expect(() => {
Object.preventExtensions(p);
}).toThrowWithMessage(TypeError, "Proxy handler's preventExtensions trap violates invariant: cannot return true if the target object is extensible");
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}
Object.preventExtensions(o);
expect(Object.preventExtensions(p)).toBe(p);
});
});