[Mac] Refactor location-bar autocomplete cell classes.

chrome/browser/cocoa/autocomplete_text_field_cell_unittest.mm

+// Copyright (c) 2009 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 <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/autocomplete_text_field_cell.h"
+#import "chrome/browser/cocoa/cocoa_test_helper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+// TODO(shess): Make a sensible distinction between
+// AutocompleteTextField unittesting and AutocompleteTextFieldCell
+// unittesting - or, since AutocompleteTextFieldCell doesn't really
+// have independent existence, just put tests for both in
+// autocomplete_text_field_unittest.mm.
+
+class AutocompleteTextFieldCellTest : public testing::Test {
+ public:
+  AutocompleteTextFieldCellTest() {
+    NSRect frame = NSMakeRect(0, 0, 50, 30);
+    view_.reset([[NSTextField alloc] initWithFrame:frame]);
+    scoped_nsobject<AutocompleteTextFieldCell> cell(
+        [[AutocompleteTextFieldCell alloc] initTextCell:@"Testing"]);
+    [view_ setCell:cell.get()];
+    [cocoa_helper_.contentView() addSubview:view_.get()];
+  }
+
+  CocoaTestHelper cocoa_helper_;  // Inits Cocoa, creates window, etc...
+  scoped_nsobject<NSTextField> view_;
+};
+
+// Test adding/removing from the view hierarchy, mostly to ensure nothing
+// leaks or crashes.
+TEST_F(AutocompleteTextFieldCellTest, AddRemove) {
+  EXPECT_EQ(cocoa_helper_.contentView(), [view_ superview]);
+  [view_.get() removeFromSuperview];
+  EXPECT_FALSE([view_ superview]);
+}
+
+// Test drawing, mostly to ensure nothing leaks or crashes.
+TEST_F(AutocompleteTextFieldCellTest, Display) {
+  [view_ display];
+}
+
+}  // namespace