Add an ID to the ContentSuggestion

ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier_unittest.mm

Index: ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier_unittest.mm
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier_unittest.mm b/ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier_unittest.mm
new file mode 100644
index 0000000000000000000000000000000000000000..635c58d6018bdb61330f5f89b7d46e9c58bb832c
--- /dev/null
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier_unittest.mm
@@ -0,0 +1,92 @@
+// Copyright 2017 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/content_suggestions/content_suggestion_identifier.h"
+
+#import "ios/chrome/browser/ui/content_suggestions/content_suggestions_section_information.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@interface ContentSuggestionIdentifierSubclassTest : ContentSuggestionIdentifier
+@end
+
+@implementation ContentSuggestionIdentifierSubclassTest
+@end
+
+// Tests different equality scenario.
+TEST(ContentSuggestionIdentifierTest, IsEquals) {
+  // Setup.
+  std::string id1("identifier");
+  std::string id2("identifier");
+  ContentSuggestionsSectionInformation* sectionInfo =
+      [[ContentSuggestionsSectionInformation alloc]
+          initWithSectionID:ContentSuggestionsSectionArticles];
+
+  ContentSuggestionIdentifier* suggestionIdentifier1 =
+      [[ContentSuggestionIdentifier alloc] init];
+  suggestionIdentifier1.sectionInfo = sectionInfo;
+  suggestionIdentifier1.IDInSection = id1;
+
+  ContentSuggestionIdentifier* suggestionIdentifier2 =
+      [[ContentSuggestionIdentifier alloc] init];
+  suggestionIdentifier2.sectionInfo = sectionInfo;
+  suggestionIdentifier2.IDInSection = id2;
+
+  ContentSuggestionIdentifierSubclassTest* subclass =
+      [[ContentSuggestionIdentifierSubclassTest alloc] init];
+  subclass.sectionInfo = sectionInfo;
+  subclass.IDInSection = id2;
+
+  // Action and Test.
+  EXPECT_TRUE([suggestionIdentifier1 isEqual:suggestionIdentifier2]);
+  EXPECT_TRUE([suggestionIdentifier1 isEqual:suggestionIdentifier1]);
+  EXPECT_TRUE([suggestionIdentifier1 isEqual:subclass]);
+}
+
+// Test non-equality between different objects.
+TEST(ContentSuggestionIdentifierTest, IsNotEqualsDifferentObjects) {
+  // Setup.
+  NSObject* object = [[NSObject alloc] init];
+  ContentSuggestionIdentifier* suggestionIdentifier =
+      [[ContentSuggestionIdentifier alloc] init];
+
+  // Action and Test.
+  EXPECT_FALSE([suggestionIdentifier isEqual:object]);
+}
+
+// Test non-equality.
+TEST(ContentSuggestionIdentifierTest, IsNotEquals) {
+  // Setup.
+  std::string id1("identifier");
+  std::string id2("identifier2");
+  ContentSuggestionsSectionInformation* sectionInfo1 =
+      [[ContentSuggestionsSectionInformation alloc]
+          initWithSectionID:ContentSuggestionsSectionArticles];
+  ContentSuggestionsSectionInformation* sectionInfo2 =
+      [[ContentSuggestionsSectionInformation alloc]
+          initWithSectionID:ContentSuggestionsSectionBookmarks];
+
+  ContentSuggestionIdentifier* suggestionIdentifier1 =
+      [[ContentSuggestionIdentifier alloc] init];
+  suggestionIdentifier1.sectionInfo = sectionInfo1;
+  suggestionIdentifier1.IDInSection = id1;
+
+  ContentSuggestionIdentifier* suggestionIdentifier2 =
+      [[ContentSuggestionIdentifier alloc] init];
+  suggestionIdentifier2.sectionInfo = sectionInfo1;
+  suggestionIdentifier2.IDInSection = id2;
+
+  ContentSuggestionIdentifier* suggestionIdentifier3 =
+      [[ContentSuggestionIdentifier alloc] init];
+  suggestionIdentifier3.sectionInfo = sectionInfo2;
+  suggestionIdentifier3.IDInSection = id1;
+
+  // Action and Test.
+  EXPECT_FALSE([suggestionIdentifier1 isEqual:suggestionIdentifier2]);
+  EXPECT_FALSE([suggestionIdentifier2 isEqual:suggestionIdentifier3]);
+  EXPECT_FALSE([suggestionIdentifier1 isEqual:suggestionIdentifier3]);
+}