Create an autofill Suggestion class

components/autofill/core/browser/suggestion_test_helpers.h

+// Copyright 2014 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.
+
+#ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_SUGGESTION_TEST_HELPERS_H_
+#define COMPONENTS_AUTOFILL_CORE_BROWSER_SUGGESTION_TEST_HELPERS_H_
+
+#include "components/autofill/core/browser/suggestion.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace autofill {
+
+// Gmock matcher that allows checking a member of the Suggestion class in a
+// vector. This wraps a GMock container matcher, converts the suggestion
+// members to a vector, and then runs the container matcher against the result
+// to test an argument. See SuggestionVectorIdsAre() below.
+template<typename EltType>
+class SuggestionVectorMembersAreMatcher
+    : public testing::MatcherInterface<const std::vector<Suggestion>&> {
+ public:
+  typedef std::vector<EltType> Container;
+  typedef testing::Matcher<Container> ContainerMatcher;
+
+  SuggestionVectorMembersAreMatcher(
+      const ContainerMatcher& seq_matcher,
+      EltType Suggestion::*elt)
+      : container_matcher_(seq_matcher),
+        element_(elt) {
+  }
+
+  virtual bool MatchAndExplain(const std::vector<Suggestion>& suggestions,
+                               testing::MatchResultListener* listener) const {
+    Container container;
+    for (const auto& suggestion : suggestions)
+      container.push_back(suggestion.*element_);
+    return container_matcher_.MatchAndExplain(container, listener);
+  }
+
+  virtual void DescribeTo(::std::ostream* os) const {
+    container_matcher_.DescribeTo(os);
+  }
+
+  virtual void DescribeNegationTo(::std::ostream* os) const {
+    container_matcher_.DescribeNegationTo(os);
+  }
+
+ private:
+  ContainerMatcher container_matcher_;
+  EltType Suggestion::*element_;
+};
+
+// Use this matcher to compare a sequence vector's IDs to a list. In an
+// EXPECT_CALL statement, use the following for an vector<Suggestion> argument
+// to compare the IDs against a constant list:
+//   SuggestionVectorIdsAre(testing::ElementsAre(1, 2, 3, 4))
+template<class EltsAreMatcher>
+inline testing::Matcher<const std::vector<Suggestion>&>
+SuggestionVectorIdsAre(const EltsAreMatcher& elts_are_matcher) {
+  return testing::MakeMatcher(
+      new SuggestionVectorMembersAreMatcher<int>(
+          elts_are_matcher, &Suggestion::frontend_id));
+}
+
+// Like SuggestionVectorIdsAre but tests the values instead of ID.
+template<class EltsAreMatcher>
+inline testing::Matcher<const std::vector<Suggestion>&>
+SuggestionVectorValuesAre(const EltsAreMatcher& elts_are_matcher) {
+  return testing::MakeMatcher(
+      new SuggestionVectorMembersAreMatcher<base::string16>(
+          elts_are_matcher, &Suggestion::value));
+}
+
+}  // namespace autofill
+
+#endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_SUGGESTION_TEST_HELPERS_H_