Add a unit test for BrowserViewLayout

chrome/browser/ui/views/frame/browser_view_layout_unittest.cc

+// Copyright 2013 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/ui/views/frame/browser_view_layout.h"
+
+#include "chrome/browser/ui/views/frame/browser_view.h"
+#include "chrome/test/base/browser_with_test_window_test.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+// Tests of the LayoutManger for BrowserView.
+class BrowserViewLayoutTest : public BrowserWithTestWindowTest {
+ public:
+  BrowserViewLayoutTest() : layout_(NULL) {}
+  virtual ~BrowserViewLayoutTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    // BrowserWithTestWindowTest takes ownership of BrowserView via |window_|.
+    BrowserView* browser_view = new BrowserView;
+    set_window(browser_view);
+
+    // Creates a Browser using |browser_view| as its BrowserWindow.
+    BrowserWithTestWindowTest::SetUp();
+
+    // Memory ownership is tricky here. BrowserView needs ownership of
+    // |browser|, so BrowserWithTestWindowTest cannot continue to own it.
+    Browser* browser = release_browser();
+    browser_view->Init(browser);
+
+    // BrowserView also takes ownership of |layout_|.
+    layout_ = new BrowserViewLayout(browser);
+    browser_view->SetLayoutManager(layout_);
+  }
+
+  BrowserViewLayout* layout() { return layout_; }
+
+ private:
+  BrowserViewLayout* layout_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserViewLayoutTest);
+};
+
+// Test basic construction and initialization.
+TEST_F(BrowserViewLayoutTest, BrowserViewLayout) {
+  EXPECT_TRUE(layout()->browser());
+  EXPECT_TRUE(layout()->GetWebContentsModalDialogHost());
+  EXPECT_EQ(BrowserViewLayout::kInstantUINone, layout()->GetInstantUIState());
+  // TODO(jamescook): Add more as we break dependencies.
+}
+
+// Test the core layout functions.
+TEST_F(BrowserViewLayoutTest, Layout) {
+  // We don't have a bookmark bar yet, so no contents offset is required.
+  EXPECT_EQ(0, layout()->GetContentsOffsetForBookmarkBar());
+  EXPECT_EQ(0, layout()->GetTopMarginForActiveContent());
+  EXPECT_EQ(0, layout()->GetTopMarginForOverlayContent());
+  // TODO(jamescook): Add more as we break dependencies.
+}