Update groupToMap tests

test/built-ins/Array/prototype/groupToMap/array-like.js

@@ -0,0 +1,35 @@
+// Copyright (c) 2021 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.groupToMap
+description: Array.prototype.groupToMap iterates array-like up to length
+info: |
+  22.1.3.15 Array.prototype.groupToMap ( callbackfn [ , thisArg ] )
+
+  ...
+
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  4. Let k be 0.
+  ...
+  6. Repeat, while k < len
+
+  ...
+includes: [compareArray.js]
+features: [array-grouping]
+---*/
+
+const arrayLike = {0: 1, 1: 2, 2: 3, 3: 4, length: 3 };
+
+let calls = 0;
+
+const map = Array.prototype.groupToMap.call(arrayLike, i => {
+  calls++;
+  return i % 2 === 0 ? 'even' : 'odd';
+});
+
+assert.sameValue(calls, 3, 'only calls length times');
+assert.compareArray(Array.from(map.keys()), ['odd', 'even']);
+assert.compareArray(map.get('even'), [2]);
+assert.compareArray(map.get('odd'), [1, 3]);

test/built-ins/Array/prototype/groupToMap/callback-arg.js

@@ -0,0 +1,33 @@
+// Copyright (c) 2021 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.groupToMap
+description: Array.prototype.groupToMap calls function with correct arguments
+info: |
+  22.1.3.15 Array.prototype.groupToMap ( callbackfn [ , thisArg ] )
+
+  ...
+
+  6. Repeat, while k < len
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let kValue be ? Get(O, Pk).
+    c. Let key be ? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »).
+    e. Perform ! AddValueToKeyedGroup(groups, key, kValue).
+  ...
+features: [array-grouping]
+---*/
+
+
+const arr = [-0, 0, 1, 2, 3];
+
+let calls = 0;
+
+arr.groupToMap((n, i, testArr) => {
+  calls++;
+  assert.sameValue(n, arr[i], "selected element aligns with index");
+  assert.sameValue(testArr, arr, "original array is passed as final argument");
+  return null;
+});
+
+assert.sameValue(calls, 5, 'called for all 5 elements');

test/built-ins/Array/prototype/groupToMap/callback-throws.js

@@ -0,0 +1,24 @@
+// Copyright (c) 2021 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.groupToMap
+description: Array.prototype.groupToMap errors when return value cannot be converted to a property key.
+info: |
+  22.1.3.15 Array.prototype.groupToMap ( callbackfn [ , thisArg ] )
+
+  ...
+
+  6. Repeat, while k < len
+    c. Let propertyKey be ? ToPropertyKey(? Call(callbackfn, thisArg, « kValue, 𝔽(k), O »)).
+
+  ...
+features: [array-grouping]
+---*/
+
+assert.throws(Test262Error, function() {
+  const array = [1];
+  array.groupToMap(function() {
+    throw new Test262Error('throw in callback');
+  })
+});

test/built-ins/Array/prototype/groupToMap/emptyList.js

@@ -0,0 +1,28 @@
+// Copyright (c) 2021 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.groupToMap
+description: Callback is not called and object is not populated if the array is empty
+info: |
+  22.1.3.15 Array.prototype.groupToMap ( callbackfn [ , thisArg ] )
+
+  ...
+
+  8. For each Record { [[Key]], [[Elements]] } g of groups, do
+
+    a. Let elements be ! CreateArrayFromList(g.[[Elements]]).
+    b. Perform ! CreateDataPropertyOrThrow(map, g.[[Key]], elements).
+
+  ...
+features: [array-grouping]
+---*/
+
+const original = [];
+
+const map = original.groupToMap(() => {
+  throw new Test262Error('callback function should not be called')
+});
+
+assert.notSameValue(original, map, 'groupToMap returns a map');
+assert.sameValue(map.size, 0);