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https://github.com/RGBCube/serenity
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LibJS: Convert Proxy tests
This commit is contained in:
Matthew Olsson
Andreas Kling
parent
b86faeaeef
commit
449a1cf3a2
14 changed files with 820 additions and 815 deletions
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@ -1,159 +1,145 @@
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load("test-common.js");
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try {
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assert(Object.getOwnPropertyDescriptor(new Proxy({}, { getOwnPropertyDescriptor: null }), "a") === undefined);
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assert(Object.getOwnPropertyDescriptor(new Proxy({}, { getOwnPropertyDescriptor: undefined }), "a") === undefined);
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assert(Object.getOwnPropertyDescriptor(new Proxy({}, {}), "a") === undefined);
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let o = {};
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let p = new Proxy(o, {
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getOwnPropertyDescriptor(target, property) {
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assert(target === o);
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assert(property === "foo");
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}
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describe("[Call][GetOwnProperty]] trap normal behavior", () => {
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test("forwarding when not defined in handler", () => {
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expect(Object.getOwnPropertyDescriptor(new Proxy({}, { getOwnPropertyDescriptor: null }), "a")).toBeUndefined();
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expect(Object.getOwnPropertyDescriptor(new Proxy({}, { getOwnPropertyDescriptor: undefined }), "a")).toBeUndefined();
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expect(Object.getOwnPropertyDescriptor(new Proxy({}, {}), "a")).toBeUndefined();
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});
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Object.getOwnPropertyDescriptor(p, "foo");
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test("correct arguments supplied to trap", () => {
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let o = {};
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let p = new Proxy(o, {
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getOwnPropertyDescriptor(target, property) {
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expect(target).toBe(o);
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expect(property).toBe("foo");
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}
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});
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o = { foo: "bar" };
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Object.defineProperty(o, "baz", { value: "qux", enumerable: false, configurable: true, writable: false });
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p = new Proxy(o, {
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getOwnPropertyDescriptor(target, property) {
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if (property === "baz")
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return Object.getOwnPropertyDescriptor(target, "baz");
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return { value: target[property], enumerable: false, configurable: true, writable: true };
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}
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});
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let d = Object.getOwnPropertyDescriptor(p, "baz");
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assert(d.configurable === true);
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assert(d.enumerable === false);
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assert(d.writable === false);
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assert(d.value === "qux");
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assert(d.get === undefined);
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assert(d.set === undefined);
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d = Object.getOwnPropertyDescriptor(p, "foo");
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assert(d.configurable === true);
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assert(d.enumerable === false);
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assert(d.writable === true);
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assert(d.value === "bar");
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assert(d.get === undefined);
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assert(d.set === undefined);
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// Invariants
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy({}, {
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getOwnPropertyDescriptor: 1
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}));
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap wasn't undefined, null, or callable",
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});
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy({}, {
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getOwnPropertyDescriptor() {
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return 1;
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},
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}));
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: must return an object or undefined",
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});
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o = {};
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Object.defineProperty(o, "foo", { value: 10, configurable: false });
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p = new Proxy(o, {
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getOwnPropertyDescriptor() {
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return undefined;
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},
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});
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assert(Object.getOwnPropertyDescriptor(p, "bar") === undefined);
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(p, "foo");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: cannot return undefined for a property on the target which is a non-configurable property",
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});
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Object.defineProperty(o, "baz", { value: 20, configurable: true, writable: true, enumerable: true });
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Object.preventExtensions(o);
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test("conditional returned descriptor", () => {
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let o = { foo: "bar" };
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Object.defineProperty(o, "baz", { value: "qux", enumerable: false, configurable: true, writable: false });
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(p, "baz");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: cannot report a property as being undefined if it exists as an own property of the target and the target is non-extensible",
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let p = new Proxy(o, {
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getOwnPropertyDescriptor(target, property) {
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if (property === "baz")
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return Object.getOwnPropertyDescriptor(target, "baz");
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return { value: target[property], enumerable: false, configurable: true, writable: true };
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}
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});
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let d = Object.getOwnPropertyDescriptor(p, "baz");
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expect(d.configurable).toBe(true);
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expect(d.enumerable).toBe(false);
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expect(d.writable).toBe(false);
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expect(d.value).toBe("qux");
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expect(d.get).toBeUndefined();
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expect(d.set).toBeUndefined();
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d = Object.getOwnPropertyDescriptor(p, "foo");
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expect(d.configurable).toBe(true);
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expect(d.enumerable).toBe(false);
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expect(d.writable).toBe(true);
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expect(d.value).toBe("bar");
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expect(d.get).toBeUndefined();
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expect(d.set).toBeUndefined();
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});
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});
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describe("[[GetOwnProperty]] invariants", () => {
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test("must return an object or undefined", () => {
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expect(() => {
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Object.getOwnPropertyDescriptor(new Proxy({}, {
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getOwnPropertyDescriptor() {
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return 1;
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},
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}));
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: must return an object or undefined");
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});
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o = {};
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Object.defineProperty(o, "v1", { value: 10, configurable: false });
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Object.defineProperty(o, "v2", { value: 10, configurable: false, enumerable: true });
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Object.defineProperty(o, "v3", { configurable: false, get() { return 1; } });
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Object.defineProperty(o, "v4", { value: 10, configurable: false, writable: false, enumerable: true });
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test("cannot return undefined for a non-configurable property", () => {
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let o = {};
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Object.defineProperty(o, "foo", { value: 10, configurable: false });
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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let p = new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { configurable: true };
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return undefined;
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},
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}), "v1");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target",
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});
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expect(Object.getOwnPropertyDescriptor(p, "bar")).toBeUndefined();
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expect(() => {
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Object.getOwnPropertyDescriptor(p, "foo");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: cannot return undefined for a property on the target which is a non-configurable property");
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});
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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test("cannot return undefined for an existing property if the target is non-extensible", () => {
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let o = {};
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Object.defineProperty(o, "baz", { value: 20, configurable: true, writable: true, enumerable: true });
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Object.preventExtensions(o);
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let p = new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { enumerable: false };
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return undefined;
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},
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}), "v2");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target",
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});
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expect(() => {
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Object.getOwnPropertyDescriptor(p, "baz");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: cannot report a property as being undefined if it exists as an own property of the target and the target is non-extensible");
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});
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { value: 10 };
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},
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}), "v3");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target",
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test("invalid property descriptors", () => {
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let o = {};
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Object.defineProperty(o, "v1", { value: 10, configurable: false });
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Object.defineProperty(o, "v2", { value: 10, configurable: false, enumerable: true });
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Object.defineProperty(o, "v3", { configurable: false, get() { return 1; } });
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Object.defineProperty(o, "v4", { value: 10, configurable: false, writable: false, enumerable: true });
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expect(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { configurable: true };
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},
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}), "v1");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target");
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expect(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { enumerable: false };
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},
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}), "v2");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target");
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expect(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { value: 10 };
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},
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}), "v3");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target");
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expect(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { value: 10, writable: true };
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},
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}), "v4");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target");
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});
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { value: 10, writable: true };
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},
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}), "v4");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: invalid property descriptor for existing property on the target",
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test("cannot report a property as non-configurable if it does not exist or is non-configurable", () => {
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let o = {};
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Object.defineProperty(o, "v", { configurable: true });
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expect(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { configurable: false };
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},
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}), "v");
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}).toThrowWithMessage(TypeError, "Proxy handler's getOwnPropertyDescriptor trap violates invariant: cannot report target's property as non-configurable if the property does not exist, or if it is configurable");
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});
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o = {};
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Object.defineProperty(o, "v", { configurable: true });
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assertThrowsError(() => {
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Object.getOwnPropertyDescriptor(new Proxy(o, {
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getOwnPropertyDescriptor() {
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return { configurable: false };
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},
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}), "v");
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}, {
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error: TypeError,
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message: "Proxy handler's getOwnPropertyDescriptor trap violates invariant: cannot report target's property as non-configurable if the property does not exist, or if it is configurable",
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});
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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}
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});
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