Upstream Chrome on iOS source code [4/11].

ios/chrome/browser/ui/collection_view/cells/collection_view_item_unittest.mm

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+
+#import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+
+TEST(CollectionViewItemTest, Accessors) {
+  CollectionViewItem* five = [[CollectionViewItem alloc] initWithType:5];
+  CollectionViewItem* twelve = [[CollectionViewItem alloc] initWithType:12];
+
+  EXPECT_EQ(5, [five type]);
+  EXPECT_EQ(12, [twelve type]);
+}
+
+TEST(CollectionViewItemTest, ConfigureCellPortsAccessibilityProperties) {
+  CollectionViewItem* item = [[CollectionViewItem alloc] initWithType:0];
+  item.accessibilityIdentifier = @"test_identifier";
+  item.accessibilityTraits = UIAccessibilityTraitButton;
+  MDCCollectionViewCell* cell = [[[item cellClass] alloc] init];
+  EXPECT_TRUE([cell isMemberOfClass:[MDCCollectionViewCell class]]);
+  EXPECT_EQ(UIAccessibilityTraitNone, [cell accessibilityTraits]);
+  EXPECT_FALSE([cell accessibilityIdentifier]);
+  [item configureCell:cell];
+  EXPECT_EQ(UIAccessibilityTraitButton, [cell accessibilityTraits]);
+  EXPECT_EQ(@"test_identifier", [cell accessibilityIdentifier]);
+}
+
+}  // namespace