Add tests for async generator function expressions

test/language/expressions/async-generators/early-errors-expression-NSPL-with-USD.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+  IsSimpleParameterList of UniqueFormalParameters is false.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(x = 1) {"use strict"});

test/language/expressions/async-generators/early-errors-expression-arguments-in-formal-parameters.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a SyntaxError if FormalParameters contains arguments in strict mode.
+negative:
+  phase: early
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+(async function*(arguments) { });

test/language/expressions/async-generators/early-errors-expression-await-as-function-binding-identifier.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: 12.1.1
+description: >
+  `await` is not a valid BindingIdentifier for AsyncGeneratorExpressions.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function* await() { });

test/language/expressions/async-generators/early-errors-expression-binding-identifier-arguments.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  If the source code matching this production is strict code, it is a
+  Syntax Error if BindingIdentifier is the IdentifierName arguments.
+negative:
+  phase: early
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+(async function* arguments() { });

test/language/expressions/async-generators/early-errors-expression-binding-identifier-eval.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  If the source code matching this production is strict code, it is a
+  Syntax Error if BindingIdentifier is the IdentifierName eval.
+negative:
+  phase: early
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+(async function* eval() { });

test/language/expressions/async-generators/early-errors-expression-body-contains-super-call.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a syntax error if AsyncGeneratorBody contains SuperCall is true.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*() { super(); });

test/language/expressions/async-generators/early-errors-expression-body-contains-super-property.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a syntax error if AsyncGeneratorBody contains SuperProperty is true.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*() { super.prop; });

test/language/expressions/async-generators/early-errors-expression-eval-in-formal-parameters.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a SyntaxError if FormalParameters contains eval in strict mode.
+negative:
+  phase: early
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+(async function*(eval) { });

test/language/expressions/async-generators/early-errors-expression-formals-body-duplicate-const.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a SyntaxError if BoundNames of FormalParameters also occurs in the
+  LexicallyDeclaredNames of AsyncFunctionBody
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(a) { const a = 0; });

test/language/expressions/async-generators/early-errors-expression-formals-body-duplicate-let.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a SyntaxError if BoundNames of FormalParameters also occurs in the
+  LexicallyDeclaredNames of AsyncFunctionBody
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(a) { let a; });

test/language/expressions/async-generators/early-errors-expression-formals-contains-await-expr.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a Syntax Error if FormalParameters Contains AwaitExpression is true.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(x = await 1) { });

test/language/expressions/async-generators/early-errors-expression-formals-contains-await.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: 12.1
+description: >
+  `await` is a reserved keyword within async generator function bodies and may
+  not be used as the binding identifier of a parameter.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(await) { });

test/language/expressions/async-generators/early-errors-expression-formals-contains-super-call.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a syntax error if FormalParameters contains SuperCall is true.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(a = super()) { });

test/language/expressions/async-generators/early-errors-expression-formals-contains-super-property.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a syntax error if FormalParameters contains SuperProperty is true.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(a = super.prop) { });

test/language/expressions/async-generators/early-errors-expression-formals-contains-yield-expr.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  It is a Syntax Error if FormalParameters Contains YieldExpression is true.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(x = yield) { });

test/language/expressions/async-generators/early-errors-expression-formals-contains-yield.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: 12.1
+description: >
+  `await` is a reserved keyword within async generator function bodies and may
+  not be used as the binding identifier of a parameter.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*(yield) { });

test/language/expressions/async-generators/early-errors-expression-label-name-await.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: 12.1.1
+description: >
+  `await` is a reserved keyword within async generator function bodies and may
+  not be used as a label.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*() {
+  await: 1;
+});

test/language/expressions/async-generators/early-errors-expression-label-name-yield.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: 12.1.1
+description: >
+  `yield` is a reserved keyword within async generator function bodies and may
+  not be used as a label.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function*() {
+  yield: 1;
+});

test/language/expressions/async-generators/early-errors-expression-not-simple-assignment-target.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: pending
+description: >
+  Async generator function expressions are not a simple assignment target.
+negative:
+  phase: early
+  type: ReferenceError
+---*/
+
+(async function*() { } = 1);

test/language/expressions/async-generators/early-errors-expression-yield-as-function-binding-identifier.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Caitlin Potter <caitp@igalia.com>
+esid: 12.1.1
+description: >
+  `yield` is not a valid BindingIdentifier for AsyncGeneratorExpressions.
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+(async function* yield() { });