1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-negative-one-if-predicate-returns-false-value.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-negative-one-if-predicate-returns-false-value.js
new file mode 100644
index 0000000000..419ec5ccce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-negative-one-if-predicate-returns-false-value.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return -1 if predicate always returns a boolean false value.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    ...
+  9. Return -1.
+features: [Symbol]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findIndex(function(val) {
+  called++;
+  return false;
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, -1);
+
+result = arr.findIndex(function(val) {
+  return '';
+});
+assert.sameValue(result, -1, 'coerced string');
+
+result = arr.findIndex(function(val) {
+  return undefined;
+});
+assert.sameValue(result, -1, 'coerced undefined');
+
+result = arr.findIndex(function(val) {
+  return null;
+});
+assert.sameValue(result, -1, 'coerced null');
+
+result = arr.findIndex(function(val) {
+  return 0;
+});
+assert.sameValue(result, -1, 'coerced 0');
+
+result = arr.findIndex(function(val) {
+  return NaN;
+});
+assert.sameValue(result, -1, 'coerced NaN');
+
+reportCompare(0, 0);