Adding gtest helpers for BeginFrameArgs.

cc/output/begin_frame_args_unittest.cc

Index: cc/output/begin_frame_args_unittest.cc
diff --git a/cc/output/begin_frame_args_unittest.cc b/cc/output/begin_frame_args_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4dce5e0ef5930ca8bd6141973b8cda9871a06c6d
--- /dev/null
+++ b/cc/output/begin_frame_args_unittest.cc
@@ -0,0 +1,77 @@
+// 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 <string>
+
+#include "cc/output/begin_frame_args.h"
+#include "cc/test/begin_frame_args_test.h"
+#include "testing/gtest/include/gtest/gtest-spi.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/frame_time.h"
+
+namespace cc {
+namespace {
+
+TEST(BeginFrameArgsTest, Helpers) {
+  // Quick create methods work
+  BeginFrameArgs args0 = CreateBeginFrameArgsForTesting();
+  EXPECT_TRUE(args0.IsValid()) << args0;
+
+  BeginFrameArgs args1 = CreateBeginFrameArgsForTesting(0, 0, -1);
+  EXPECT_FALSE(args1.IsValid()) << args1;
+
+  BeginFrameArgs args2 = CreateBeginFrameArgsForTesting(1, 2, 3);
+  EXPECT_TRUE(args2.IsValid()) << args2;
+  EXPECT_EQ(1, args2.frame_time.ToInternalValue());
+  EXPECT_EQ(2, args2.deadline.ToInternalValue());
+  EXPECT_EQ(3, args2.interval.ToInternalValue());
+
+  BeginFrameArgs args3 = CreateExpiredBeginFrameArgsForTesting();
+  EXPECT_TRUE(args3.IsValid()) << args3;
+  EXPECT_GT(gfx::FrameTime::Now(), args3.deadline);
+
+  // operator==
+  EXPECT_EQ(CreateBeginFrameArgsForTesting(4, 5, 6),
+            CreateBeginFrameArgsForTesting(4, 5, 6));
+
+  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(CreateBeginFrameArgsForTesting(4, 5, 6),
+                                    CreateBeginFrameArgsForTesting(7, 8, 9)),
+                          "");
+
+  // operator<<
+  std::stringstream out1;
+  out1 << args1;
+  EXPECT_EQ("BeginFrameArgs(0, 0, -1us)", out1.str());
+  std::stringstream out2;
+  out2 << args2;
+  EXPECT_EQ("BeginFrameArgs(1, 2, 3us)", out2.str());
+
+  // PrintTo
+  EXPECT_EQ(std::string("BeginFrameArgs(0, 0, -1us)"),
+            ::testing::PrintToString(args1));
+  EXPECT_EQ(std::string("BeginFrameArgs(1, 2, 3us)"),
+            ::testing::PrintToString(args2));
+}
+
+TEST(BeginFrameArgsTest, Create) {
+  // BeginFrames are not valid by default
+  BeginFrameArgs args1;
+  EXPECT_FALSE(args1.IsValid()) << args1;
+
+  BeginFrameArgs args2 =
+      BeginFrameArgs::Create(base::TimeTicks::FromInternalValue(1),
+                             base::TimeTicks::FromInternalValue(2),
+                             base::TimeDelta::FromInternalValue(3));
+  EXPECT_TRUE(args2.IsValid()) << args2;
+  EXPECT_EQ(1, args2.frame_time.ToInternalValue()) << args2;
+  EXPECT_EQ(2, args2.deadline.ToInternalValue()) << args2;
+  EXPECT_EQ(3, args2.interval.ToInternalValue()) << args2;
+
+  base::TimeTicks now = base::TimeTicks::FromInternalValue(1);
+  EXPECT_EQ(CreateBeginFrameArgsForTesting(1, 0, 16666),
+            BeginFrameArgs::CreateForSynchronousCompositor(now));
+}
+
+}  // namespace
+}  // namespace cc