// 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 false if searchLength + start position is greater than string length. 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. ... ---*/ var str = 'The future is cool!'; assert.sameValue( str.startsWith('!', str.length), false, 'str.startsWith("!", str.length) returns false' ); assert.sameValue( str.startsWith('!', 100), false, 'str.startsWith("!", 100) returns false' ); assert.sameValue( str.startsWith('!', Infinity), false, 'str.startsWith("!", Infinity) returns false' ); assert( str.startsWith('The future', -1), 'position argument < 0 will search from the start of the string (-1)' ); assert( str.startsWith('The future', -Infinity), 'position argument < 0 will search from the start of the string (-Infinity)' ); reportCompare(0, 0);