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describe("parsing freestanding async functions", () => {
test("simple", () => {
expect(`async function foo() {}`).toEval();
expect(`async
function foo() {}`).not.toEval();
});
test("await expression", () => {
expect(`async function foo() { await bar(); }`).toEval();
expect(`async function foo() { await; }`).not.toEval();
expect(`function foo() { await bar(); }`).not.toEval();
expect(`function foo() { await; }`).toEval();
});
});
describe("parsing object literal async functions", () => {
test("simple", () => {
expect(`x = { async foo() { } }`).toEval();
expect(`x = { async
foo() { } }`).not.toEval();
});
test("await expression", () => {
expect(`x = { foo() { await bar(); } }`).not.toEval();
expect(`x = { foo() { await; } }`).toEval();
expect(`x = { async foo() { await bar(); } }`).toEval();
expect(`x = { async foo() { await; } }`).not.toEval();
});
});
describe("parsing classes with async methods", () => {
test("simple", () => {
expect(`class Foo { async foo() {} }`).toEval();
expect(`class Foo { static async foo() {} }`).toEval();
expect(`class Foo { async foo() { await bar(); } }`).toEval();
expect(`class Foo { async foo() { await; } }`).not.toEval();
expect(`class Foo { async constructor() {} }`).not.toEval();
});
});
test("function expression names equal to 'await'", () => {
expect(`async function foo() { (function await() {}); }`).toEval();
expect(`async function foo() { function await() {} }`).not.toEval();
});
test("basic functionality", () => {
test("simple", () => {
let executionValue = null;
let resultValue = null;
async function foo() {
executionValue = "someValue";
return "otherValue";
}
const returnValue = foo();
expect(returnValue).toBeInstanceOf(Promise);
returnValue.then(result => {
resultValue = result;
});
runQueuedPromiseJobs();
expect(executionValue).toBe("someValue");
expect(resultValue).toBe("otherValue");
});
test("await", () => {
let resultValue = null;
async function foo() {
return "someValue";
}
async function bar() {
resultValue = await foo();
}
bar();
runQueuedPromiseJobs();
expect(resultValue).toBe("someValue");
});
});
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