Refactoring recently closed tab filtering

chrome/browser/sessions/session_utils_unittest.cc

+// Copyright (c) 2011 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.
+
+#include "chrome/browser/sessions/session_utils.h"
+
+#include "base/stl_util.h"
+#include "base/string16.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/sessions/session_types.h"
+#include "googleurl/src/gurl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class TabNavigationMock : public TabNavigation {
+ public:
+  TabNavigationMock(const char* url, const char* title)
+      : TabNavigation(0,                                  // index
+                      GURL(string16(ASCIIToUTF16(url))),  // virtual_url
+                      GURL(),                             // referrer
+                      string16(ASCIIToUTF16(title)),      // title
+                      "",                                 // state
+                      PageTransition::FROM_ADDRESS_BAR) {
+  }
+};
+
+class SessionUtilsTest : public testing::Test {
+ protected:
+  class TabMock : public TabRestoreService::Tab {
+   public:
+    TabMock(const char* url, const char* title) {
+      navigations.push_back(TabNavigationMock(url, title));
+      current_navigation_index = 0;
+    }
+  };
+
+  virtual void SetUp() {
+    // prefill the entries
+
+    // Two identical
+    entries_.push_back(new TabMock("http://a", "a"));
+    entries_.push_back(new TabMock("http://a", "a"));
+
+    // Different URL
+    entries_.push_back(new TabMock("http://b", "b"));
+    entries_.push_back(new TabMock("http://c", "b"));
+
+    // Different Title
+    entries_.push_back(new TabMock("http://d", "d"));
+    entries_.push_back(new TabMock("http://d", "e"));
+
+    // Nothing in common
+    entries_.push_back(new TabMock("http://f", "f"));
+    entries_.push_back(new TabMock("http://g", "g"));
+  }
+
+  void TearDown() {
+    STLDeleteElements(&entries_);
+  }
+
+  TabRestoreService::Entries entries_;
+};
+
+TEST_F(SessionUtilsTest, SessionUtilsFilter) {
+  TabRestoreService::Entries filtered_entries;
+
+  SessionUtils::FilteredEntries(entries_, &filtered_entries);
+  ASSERT_EQ(7U, filtered_entries.size());
+
+  // The filtering should have removed the second item
+  TabRestoreService::Entries expected = entries_;
+  TabRestoreService::Entry* first = expected.front();
+  expected.pop_front();
+  expected.pop_front();
+  expected.push_front(first);
+  ASSERT_EQ(expected, filtered_entries);
+}