RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 10:18:11 +00:00
Code Issues Activity Actions

LibJS: Convert Proxy tests

Browse source
This commit is contained in:
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
Download patch file Download diff file Expand all files Collapse all files

117
Libraries/LibJS/Tests/builtins/Proxy/Proxy.handler-set.js
View file

@ -1,66 +1,73 @@
load("test-common.js");
try {
assert((new Proxy({}, { set: undefined }).foo = 1) === 1);
assert((new Proxy({}, { set: null }).foo = 1) === 1);
assert((new Proxy({}, {}).foo = 1) === 1);
let o = {};
let p = new Proxy(o, {
set(target, prop, value, receiver) {
assert(target === o);
assert(prop === "foo");
assert(value === 10);
assert(receiver === p);
return true;
},
describe("[[Set]] trap normal behavior", () => {
test("forwarding when not defined in handler", () => {
expect((new Proxy({}, { set: undefined }).foo = 1)).toBe(1);
expect((new Proxy({}, { set: null }).foo = 1)).toBe(1);
expect((new Proxy({}, {}).foo = 1)).toBe(1);
});
p.foo = 10;
test("correct arguments supplied to trap", () => {
let o = {};
let p = new Proxy(o, {
set(target, prop, value, receiver) {
expect(target).toBe(o);
expect(prop).toBe("foo");
expect(value).toBe(10);
expect(receiver).toBe(p);
return true;
},
});
p = new Proxy(o, {
set(target, prop, value, receiver) {
if (target[prop] === value) {
target[prop] *= 2;
} else {
target[prop] = value;
}
},
p.foo = 10;
});
p.foo = 10;
assert(p.foo === 10);
p.foo = 10;
assert(p.foo === 20);
p.foo = 10;
assert(p.foo === 10);
test("conditional return value", () => {
let p = new Proxy({}, {
set(target, prop, value) {
if (target[prop] === value) {
target[prop] *= 2;
} else {
target[prop] = value;
}
},
});
// Invariants
p.foo = 10;
expect(p.foo).toBe(10);
p.foo = 10;
expect(p.foo).toBe(20);
p.foo = 10;
expect(p.foo).toBe(10);
});
});
o = {};
Object.defineProperty(o, "foo", { value: 10 });
p = new Proxy(o, {
set() {
return true;
},
describe("[[Set]] invariants", () => {
test("cannot return true for a non-configurable, non-writable property", () => {
let o = {};
Object.defineProperty(o, "foo", { value: 10 });
let p = new Proxy(o, {
set() {
return true;
},
});
expect(() => {
p.foo = 12;
}).toThrowWithMessage(TypeError, "Proxy handler's set trap violates invariant: cannot return true for a property on the target which is a non-configurable, non-writable own data property");
});
assertThrowsError(() => {
p.foo = 12;
}, {
error: TypeError,
message: "Proxy handler's set trap violates invariant: cannot return true for a property on the target which is a non-configurable, non-writable own data property",
});
test("cannot return true for a non-configurable accessor property with no setter", () => {
let o = {};
Object.defineProperty(o, "foo", { get() {} });
Object.defineProperty(o, "bar", { get() {} });
assertThrowsError(() => {
p.bar = 12;
}, {
error: TypeError,
message: "Proxy handler's set trap violates invariant: cannot return true for a property on the target which is a non-configurable own accessor property with an undefined set attribute",
});
let p = new Proxy(o, {
set() {
return true;
},
});
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}
expect(() => {
p.foo = 12;
}).toThrowWithMessage(TypeError, "Proxy handler's set trap violates invariant: cannot return true for a property on the target which is a non-configurable own accessor property with an undefined set attribute");
});
});