diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-of/dstr/array-elem-init-yield-expr.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-of/dstr/array-elem-init-yield-expr.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/dstr/array-elem-init-yield-expr.js b/js/src/tests/test262/language/statements/for-of/dstr/array-elem-init-yield-expr.js new file mode 100644 index 0000000000..986b32c2a1 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-of/dstr/array-elem-init-yield-expr.js @@ -0,0 +1,54 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-assignment/array-elem-init-yield-expr.case +// - src/dstr-assignment/default/for-of.template +/*--- +description: When a `yield` token appears within the Initializer of an AssignmentElement within a generator function body, it behaves as a YieldExpression. (For..of statement) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [generators, destructuring-binding] +flags: [generated] +info: | + IterationStatement : + for ( LeftHandSideExpression of AssignmentExpression ) Statement + + 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », + AssignmentExpression, iterate). + 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, + keyResult, assignment, labelSet). + + 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation + + [...] + 4. If destructuring is true and if lhsKind is assignment, then + a. Assert: lhs is a LeftHandSideExpression. + b. Let assignmentPattern be the parse of the source text corresponding to + lhs using AssignmentPattern as the goal symbol. + [...] +---*/ +var value = []; +var iterationResult, iter, x; +iter = (function*() { + +var counter = 0; + +for ([ x = yield ] of [[]]) { + + counter += 1; +} + +assert.sameValue(counter, 1); + +})(); + +iterationResult = iter.next(); + +assert.sameValue(iterationResult.value, undefined); +assert.sameValue(iterationResult.done, false); +assert.sameValue(x, undefined); + +iterationResult = iter.next(86); + +assert.sameValue(iterationResult.value, undefined); +assert.sameValue(iterationResult.done, true); +assert.sameValue(x, 86); + +reportCompare(0, 0); |