65 lines
2.4 KiB
JavaScript
65 lines
2.4 KiB
JavaScript
describe("parsing freestanding generators", () => {
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test("simple", () => {
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expect(`function* foo() {}`).toEval();
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expect(`function *foo() {}`).toEval();
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expect(`function
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*foo() {}`).toEval();
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expect(`function *await() {}`).toEval();
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expect(`function *yield() {}`).toEval();
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});
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test("yield expression", () => {
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expect(`function* foo() { yield; }`).toEval();
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expect(`function* foo() { yield (yield); }`).toEval();
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expect(`function* foo() { yield (yield foo); }`).toEval();
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expect(`function foo() { yield; }`).toEval();
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expect(`function foo() { yield 3; }`).not.toEval();
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});
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test("yield expression only gets the first expression", () => {
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expect("function* foo() { yield 2,3 }").toEval();
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expect("function* foo() { ({...yield yield, }) }").toEval();
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});
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test("yield-from expression", () => {
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expect(`function* foo() { yield *bar; }`).toEval();
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expect(`function* foo() { yield *(yield); }`).toEval();
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expect(`function* foo() { yield
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*bar; }`).not.toEval();
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expect(`function foo() { yield
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*bar; }`).toEval();
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});
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});
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describe("parsing object literal generator functions", () => {
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test("simple", () => {
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expect(`x = { *foo() { } }`).toEval();
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expect(`x = { * foo() { } }`).toEval();
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expect(`x = { *
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foo() { } }`).toEval();
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});
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test("yield", () => {
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expect(`x = { foo() { yield; } }`).toEval();
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expect(`x = { *foo() { yield; } }`).toEval();
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expect(`x = { *foo() { yield 42; } }`).toEval();
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expect(`x = { foo() { yield 42; } }`).not.toEval();
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expect(`x = { *foo() { yield (yield); } }`).toEval();
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expect(`x = { *
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foo() { yield (yield); } }`).toEval();
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});
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});
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describe("parsing classes with generator methods", () => {
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test("simple", () => {
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expect(`class Foo { *foo() {} }`).toEval();
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expect(`class Foo { static *foo() {} }`).toEval();
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expect(`class Foo { *foo() { yield; } }`).toEval();
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expect(`class Foo { *foo() { yield 42; } }`).toEval();
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expect(`class Foo { *constructor() { yield 42; } }`).not.toEval();
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});
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});
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test("function expression names equal to 'yield'", () => {
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expect(`function *foo() { (function yield() {}); }`).toEval();
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expect(`function *foo() { function yield() {} }`).not.toEval();
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});
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