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LibJS: Parse async generator functions

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davidot 2021-11-15 01:53:24 +01:00 • committed by Linus Groh
parent 5d0f666f22
commit 0982a73d1d
13 changed files with 270 additions and 40 deletions
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55
Userland/Libraries/LibJS/Tests/syntax/async-generators.js Normal file
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describe("parsing freestanding generators", () => {
test("simple", () => {
expect(`async function* foo() {}`).toEval();
expect(`async function *foo() {}`).toEval();
expect(`async function
*foo() {}`).toEval();
});
test("yield & await expression", () => {
expect(`async function* foo() { yield; await 1; }`).toEval();
expect(`async function* foo() { yield (yield); await (yield); }`).toEval();
expect(`async function* foo() { yield (yield foo); yield (await foo); }`).toEval();
expect(`async function foo() { yield; }`).toEval();
expect(`async function foo() { yield 3; }`).not.toEval();
expect(`function* foo() { await 3; }`).not.toEval();
});
test("yield-from expression", () => {
expect(`async function* foo() { yield *bar; }`).toEval();
expect(`async function* foo() { yield *(yield); }`).toEval();
expect(`async function* foo() { yield
*bar; }`).not.toEval();
expect(`async function foo() { yield
*bar; }`).toEval();
});
});
describe("parsing object literal generator functions", () => {
test("simple", () => {
expect(`x = { async *foo() { } }`).toEval();
expect(`x = { async * foo() { } }`).toEval();
expect(`x = { async *
foo() { } }`).toEval();
});
test("yield & await", () => {
expect(`x = { async foo() { yield; await 3;} }`).toEval();
expect(`x = { async *foo() { yield; await 3; } }`).toEval();
expect(`x = { async *foo() { yield 42; await 3; } }`).toEval();
expect(`x = { async *foo() { yield (yield); await (yield); } }`).toEval();
expect(`x = { async *
foo() { yield (yield); await 4; } }`).toEval();
expect(`x = { async foo() { yield 42; } }`).not.toEval();
expect(`x = { *foo() { await 42; } }`).not.toEval();
});
});
describe("parsing classes with generator methods", () => {
test("simple", () => {
expect(`class Foo { async *foo() {} }`).toEval();
expect(`class Foo { static async *foo() {} }`).toEval();
expect(`class Foo { async *foo() { yield; } }`).toEval();
expect(`class Foo { async *foo() { yield 42; } }`).toEval();
expect(`class Foo { async *constructor() { yield 42; } }`).not.toEval();
});
});