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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/language/module-code/instn-named-bndng-trlng-comma.js | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/module-code/instn-named-bndng-trlng-comma.js b/js/src/tests/test262/language/module-code/instn-named-bndng-trlng-comma.js new file mode 100644 index 0000000000..8c23ee8161 --- /dev/null +++ b/js/src/tests/test262/language/module-code/instn-named-bndng-trlng-comma.js @@ -0,0 +1,57 @@ +// |reftest| module +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +description: > + Imported binding reflects state of exported `var` binding when ImportsList + has a trailing comma +esid: sec-moduledeclarationinstantiation +info: | + [...] + 12. For each ImportEntry Record in in module.[[ImportEntries]], do + a. Let importedModule be ? HostResolveImportedModule(module, + in.[[ModuleRequest]]). + b. If in.[[ImportName]] is "*", then + [...] + c. Else, + i. Let resolution be ? + importedModule.ResolveExport(in.[[ImportName]], « », « »). + ii. If resolution is null or resolution is "ambiguous", throw a + SyntaxError exception. + iii. Call envRec.CreateImportBinding(in.[[LocalName]], + resolution.[[Module]], resolution.[[BindingName]]). + [...] + 14. Let declaredVarNames be a new empty List. + 15. For each element d in varDeclarations do + a. For each element dn of the BoundNames of d do + i. If dn is not an element of declaredVarNames, then + 1. Perform ! envRec.CreateMutableBinding(dn, false). + 2. Call envRec.InitializeBinding(dn, undefined). + 3. Append dn to declaredVarNames. + [...] + + 8.1.1.5.5 CreateImportBinding + + [...] + 5. Create an immutable indirect binding in envRec for N that references M + and N2 as its target binding and record that the binding is initialized. + 6. Return NormalCompletion(empty). +flags: [module] +---*/ + +assert.sameValue( + y, + undefined, + 'binding is initialized to `undefined` prior to module evaulation' +); + +assert.throws(TypeError, function() { + y = null; +}, 'binding rejects assignment'); + +assert.sameValue(y, undefined, 'binding value is immutable'); + +import { x as y , } from './instn-named-bndng-trlng-comma.js'; +export var x = 23; + +reportCompare(0, 0); |