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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js new file mode 100644 index 0000000000..9df93fb9e4 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js @@ -0,0 +1,64 @@ +// Copyright (C) 2021 Microsoft. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-array.prototype.findlastindex +description: > + Return index if predicate return a boolean true value. +info: | + Array.prototype.findLastIndex ( predicate[ , thisArg ] ) + + ... + 5. Repeat, while k ≥ 0, + ... + c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)). + d. If testResult is true, return 𝔽(k). + ... +features: [Symbol, array-find-from-last] +---*/ + +var arr = ['Shoes', 'Car', 'Bike']; +var called = 0; + +var result = arr.findLastIndex(function() { + called++; + return true; +}); + +assert.sameValue(result, 2); +assert.sameValue(called, 1, 'predicate was called once'); + +called = 0; +result = arr.findLastIndex(function(val) { + called++; + return val === 'Shoes'; +}); + +assert.sameValue(called, 3, 'predicate was called three times'); +assert.sameValue(result, 0); + +result = arr.findLastIndex(function() { + return 'string'; +}); +assert.sameValue(result, 2, 'coerced string'); + +result = arr.findLastIndex(function() { + return {}; +}); +assert.sameValue(result, 2, 'coerced object'); + +result = arr.findLastIndex(function() { + return Symbol(''); +}); +assert.sameValue(result, 2, 'coerced Symbol'); + +result = arr.findLastIndex(function() { + return 1; +}); +assert.sameValue(result, 2, 'coerced number'); + +result = arr.findLastIndex(function() { + return -1; +}); +assert.sameValue(result, 2, 'coerced negative number'); + +reportCompare(0, 0); |