[Mac] Convert omnibox keyword hint to decoration.

chrome/browser/cocoa/location_bar/keyword_hint_decoration_unittest.mm

Index: chrome/browser/cocoa/location_bar/keyword_hint_decoration_unittest.mm
diff --git a/chrome/browser/cocoa/location_bar/keyword_hint_decoration_unittest.mm b/chrome/browser/cocoa/location_bar/keyword_hint_decoration_unittest.mm
new file mode 100644
index 0000000000000000000000000000000000000000..1ee8c8ebe2703f87422e79870640a14c6363709a
--- /dev/null
+++ b/chrome/browser/cocoa/location_bar/keyword_hint_decoration_unittest.mm
@@ -0,0 +1,57 @@
+// Copyright (c) 2010 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>
+
+#import "chrome/browser/cocoa/location_bar/keyword_hint_decoration.h"
+
+#import "chrome/browser/cocoa/cocoa_test_helper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+class KeywordHintDecorationTest : public CocoaTest {
+ public:
+  KeywordHintDecorationTest()
+      : decoration_(NULL) {
+  }
+
+  KeywordHintDecoration decoration_;
+};
+
+TEST_F(KeywordHintDecorationTest, GetWidthForSpace) {
+  decoration_.SetVisible(true);
+  decoration_.SetKeyword(std::wstring(L"Google"), false);
+
+  const CGFloat kVeryWide = 1000.0;
+  const CGFloat kFairlyWide = 100.0;  // Estimate for full hint space.
+  const CGFloat kEditingSpace = 50.0;
+
+  // Wider than the [tab] image when we have lots of space.
+  EXPECT_NE(decoration_.GetWidthForSpace(kVeryWide),
+            LocationBarDecoration::kOmittedWidth);
+  EXPECT_GE(decoration_.GetWidthForSpace(kVeryWide), kFairlyWide);
+
+  // When there's not enough space for the text, trims to something
+  // narrower.
+  const CGFloat full_width = decoration_.GetWidthForSpace(kVeryWide);
+  const CGFloat not_wide_enough = full_width - 10.0;
+  EXPECT_NE(decoration_.GetWidthForSpace(not_wide_enough),
+            LocationBarDecoration::kOmittedWidth);
+  EXPECT_LT(decoration_.GetWidthForSpace(not_wide_enough), full_width);
+
+  // Even trims when there's enough space for everything, but it would
+  // eat "too much".
+  EXPECT_NE(decoration_.GetWidthForSpace(full_width + kEditingSpace),
+            LocationBarDecoration::kOmittedWidth);
+  EXPECT_LT(decoration_.GetWidthForSpace(full_width + kEditingSpace),
+            full_width);
+
+  // Omitted when not wide enough to fit even the image.
+  const CGFloat image_width = decoration_.GetWidthForSpace(not_wide_enough);
+  EXPECT_EQ(decoration_.GetWidthForSpace(image_width - 1.0),
+            LocationBarDecoration::kOmittedWidth);
+}
+
+}  // namespace