Add a Material Design Circular Activity Indicator (Spinner) view for Mac.

chrome/browser/ui/cocoa/spinner_view_unittest.mm

+// Copyright 2015 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/cocoa/spinner_view.h"
+
+#import "ui/gfx/test/ui_cocoa_test_helper.h"
+
+@interface SpinnerView (ExposedForTesting)
+
+- (BOOL)isAnimating;
+
+@end
+
+@implementation SpinnerView (ExposedForTesting)
+
+- (BOOL)isAnimating {
+  return isAnimating_;
+}
+
+@end
+
+namespace {
+
+class SpinnerViewTest : public ui::CocoaTest {
+ public:
+  SpinnerViewTest() {
+    CGRect frame = NSMakeRect(0.0, 0.0, 16.0, 16.0);
+    view_.reset([[SpinnerView alloc] initWithFrame:frame]);
+    [[test_window() contentView] addSubview:view_];
+  }
+
+  base::scoped_nsobject<SpinnerView> view_;
+};
+
+TEST_VIEW(SpinnerViewTest, view_)
+
+TEST_F(SpinnerViewTest, StopAnimationOnMiniaturize) {
+  EXPECT_TRUE([view_ isAnimating]);
+
+  [test_window() miniaturize:nil];
+  EXPECT_FALSE([view_ isAnimating]);
+
+  [test_window() deminiaturize:nil];
+  EXPECT_TRUE([view_ isAnimating]);
+}
+
+TEST_F(SpinnerViewTest,
+       StopAnimationOnRemoveFromSuperview) {
+  EXPECT_TRUE([view_ isAnimating]);
+
+  [view_ removeFromSuperview];
+  EXPECT_FALSE([view_ isAnimating]);
+
+  [[test_window() contentView] addSubview:view_];
+  EXPECT_TRUE([view_ isAnimating]);
+}
+
+TEST_F(SpinnerViewTest, StopAnimationOnHidden) {
+  EXPECT_TRUE([view_ isAnimating]);
+
+  [view_ setHidden:YES];
+  EXPECT_FALSE([view_ isAnimating]);
+
+  [view_ setHidden:NO];
+  EXPECT_TRUE([view_ isAnimating]);
+}
+
+} // namespace

[Robert Sesek, 2015/04/02 19:58:36]

nit: two spaces before end-of-line comments