diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-of/map-contract-expand.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-of/map-contract-expand.js | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/map-contract-expand.js b/js/src/tests/test262/language/statements/for-of/map-contract-expand.js new file mode 100644 index 0000000000..c9cc3ed190 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-of/map-contract-expand.js @@ -0,0 +1,39 @@ +// Copyright (C) 2015 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +description: Map entry removal and re-insertion during traversal using for..of +info: | + Entries removed from a Map instance during traversal should be visited if + they are re-inserted prior to iterator exhaustion. +es6id: 13.6.4 +features: [Map] +---*/ + +var map = new Map(); +var iterationCount = 0; + +var first = [0, 'a']; +var second = [1, 'b']; + +map.set(0, 'a'); +map.set(1, 'b'); + +for (var x of map) { + assert.sameValue(x[0], first[0]); + assert.sameValue(x[1], first[1]); + + first = second; + second = null; + + if (first !== null) { + map.delete(1); + map.set(1, 'b'); + } + + iterationCount += 1; +} + +assert.sameValue(iterationCount, 2); + +reportCompare(0, 0); |