sync some global and pure tests

Author: zloirock

tests/unit-pure/es.array.fill.js

@@ -1,4 +1,4 @@
-import { STRICT } from '../helpers/constants.js';
+import { DESCRIPTORS, STRICT } from '../helpers/constants.js';
 
 import fill from 'core-js-pure/es/array/fill';
 
@@ -16,4 +16,14 @@ QUnit.test('Array#fill', assert => {
     assert.throws(() => fill(null, 0), TypeError);
     assert.throws(() => fill(undefined, 0), TypeError);
   }
+  if (DESCRIPTORS) {
+    // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+    assert.notThrows(() => fill(Object.defineProperty({
+      length: -1,
+    }, 0, {
+      set() {
+        throw new Error();
+      },
+    })), 'uses ToLength');
+  }
 });

tests/unit-pure/es.array.find-index.js

@@ -7,10 +7,11 @@ QUnit.test('Array#findIndex', assert => {
   const array = [1];
   const context = {};
   findIndex(array, function (value, key, that) {
-    assert.same(this, context);
-    assert.same(value, 1);
-    assert.same(key, 0);
-    assert.same(that, array);
+    assert.same(arguments.length, 3, 'correct number of callback arguments');
+    assert.same(value, 1, 'correct value in callback');
+    assert.same(key, 0, 'correct index in callback');
+    assert.same(that, array, 'correct link to array in callback');
+    assert.same(this, context, 'correct callback context');
   }, context);
   assert.same(findIndex([1, 3, NaN, 42, {}], it => it === 42), 3);
   assert.same(findIndex([1, 3, NaN, 42, {}], it => it === 43), -1);

tests/unit-pure/es.array.find.js

@@ -7,10 +7,11 @@ QUnit.test('Array#find', assert => {
   const array = [1];
   const context = {};
   find(array, function (value, key, that) {
-    assert.same(this, context);
-    assert.same(value, 1);
-    assert.same(key, 0);
-    assert.same(that, array);
+    assert.same(arguments.length, 3, 'correct number of callback arguments');
+    assert.same(value, 1, 'correct value in callback');
+    assert.same(key, 0, 'correct index in callback');
+    assert.same(that, array, 'correct link to array in callback');
+    assert.same(this, context, 'correct callback context');
   }, context);
   assert.same(find([1, 3, NaN, 42, {}], it => it === 42), 42);
   assert.same(find([1, 3, NaN, 42, {}], it => it === 43), undefined);