diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js')
-rw-r--r-- | js/src/tests/test262/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js b/js/src/tests/test262/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js new file mode 100644 index 0000000000..a65c494055 --- /dev/null +++ b/js/src/tests/test262/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js @@ -0,0 +1,42 @@ +// Copyright (C) 2015 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 21.1.3.18 +description: > + Returns true if searchString.length == 0. +info: | + 21.1.3.18 String.prototype.startsWith ( searchString [ , position ] ) + + ... + 11. Let len be the number of elements in S. + 12. Let start be min(max(pos, 0), len). + 13. Let searchLength be the number of elements in searchStr. + 14. If searchLength+start is greater than len, return false. + 15. If the sequence of elements of S starting at start of length searchLength + is the same as the full element sequence of searchStr, return true. + ... +---*/ + +var str = 'The future is cool!'; + +assert( + str.startsWith(''), + 'str.startsWith("") returns true' +); + +assert( + str.startsWith('', str.length), + 'str.startsWith("", str.length) returns true' +); + +assert( + str.startsWith(''), + 'str.startsWith("") returns true' +); + +assert( + str.startsWith('', Infinity), + 'str.startsWith("", Infinity) returns true' +); + +reportCompare(0, 0); |