Revert "Revert "Reland 2: mac: Use a placeholder string for the family name of the system font." Br…

Source/platform/fonts/mac/FontFamilyMatcherMacTest.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.
+
+#import "config.h"
+#import "platform/fonts/mac/FontFamilyMatcherMac.h"
+
+#include <AppKit/AppKit.h>
+#include <gtest/gtest.h>
+
+#import "platform/mac/VersionUtilMac.h"
+
+@interface NSString (YosemiteAdditions)
+- (BOOL)containsString:(NSString*)string;
+@end
+
+namespace blink {
+
+void TestSystemFontContainsString(FontWeight desiredWeight, NSString* substring)
+{
+    NSFont* font = MatchNSFontFamily(@"BlinkMacSystemFont", 0, desiredWeight, 11);
+    EXPECT_TRUE([font.description containsString:substring]);
+}
+
+TEST(FontFamilyMatcherMacTest, YosemiteFontWeights)
+{
+    if (IsOSMavericksOrEarlier())
+        return;
+
+    TestSystemFontContainsString(FontWeight100, @"-UltraLight");
+    TestSystemFontContainsString(FontWeight200, @"-Thin");
+    TestSystemFontContainsString(FontWeight300, @"-Light");
+    TestSystemFontContainsString(FontWeight400, @"-Regular");
+    TestSystemFontContainsString(FontWeight500, @"-Medium");
+    TestSystemFontContainsString(FontWeight600, @"-Bold");
+    TestSystemFontContainsString(FontWeight700, @"-Bold");
+    TestSystemFontContainsString(FontWeight800, @"-Heavy");
+    TestSystemFontContainsString(FontWeight900, @"-Heavy");
+}
+
+} // namespace blink