1 files changed, 159 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species.js
@@ -0,0 +1,159 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Assert behavior if this value has a custom object constructor property
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+  6. If IsConstructor(C) is true, then
+    a. Let thisRealm be the current Realm Record.
+    b. Let realmC be ? GetFunctionRealm(C).
+    c. If thisRealm and realmC are not the same Realm Record, then
+      i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, set C to undefined.
+  7. If Type(C) is Object, then
+    a. Set C to ? Get(C, @@species).
+    b. If C is null, set C to undefined.
+  8. If C is undefined, return ? ArrayCreate(length).
+  9. If IsConstructor(C) is false, throw a TypeError exception.
+  10. Return ? Construct(C, « length »).
+features: [Array.prototype.flatMap, Symbol, Symbol.species]
+includes: [compareArray.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flatMap,
+  'function',
+  'The value of `typeof Array.prototype.flatMap` is expected to be "function"'
+);
+
+var arr = [[42, 1], [42, 2]];
+var mapperFn = function(e) { return e; };
+
+arr.constructor = {};
+var actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+
+var called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return null;
+  }
+};
+actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return undefined;
+  }
+};
+actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return '';
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return false;
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return {};
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return [];
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return Symbol();
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+reportCompare(0, 0);