Add AutoTimer to folly

[folly.git] / folly / experimental / test / AutoTimerTest.cpp

diff --git a/folly/experimental/test/AutoTimerTest.cpp b/folly/experimental/test/AutoTimerTest.cpp
new file mode 100644 (file)
index 0000000..bb23239
--- /dev/null
+++ b/folly/experimental/test/AutoTimerTest.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2015 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <gtest/gtest.h>
+
+#include <folly/experimental/AutoTimer.h>
+
+using namespace folly;
+using namespace std;
+
+struct StubLogger {
+  void operator()(StringPiece msg, double sec) {
+    m = msg;
+    t = sec;
+  }
+  static StringPiece m;
+  static double t;
+};
+
+StringPiece StubLogger::m = "";
+double StubLogger::t = 0;
+
+struct StubClock {
+  typedef std::chrono::seconds duration;
+
+  static std::chrono::time_point<StubClock> now() {
+    return std::chrono::time_point<StubClock>(std::chrono::duration<int>(t));
+  }
+  static int t;
+};
+
+int StubClock::t = 0;
+
+TEST(TestAutoTimer, HandleBasic) {
+  StubClock::t = 1;
+  AutoTimer<StubLogger, StubClock> timer;
+  StubClock::t = 3;
+  timer.log("foo");
+  ASSERT_EQ("foo", StubLogger::m);
+  ASSERT_EQ(2, StubLogger::t);
+}
+
+TEST(TestAutoTimer, HandleLogOnDestruct) {
+  {
+    StubClock::t = 0;
+    AutoTimer<StubLogger, StubClock> timer("message");
+    StubClock::t = 3;
+    timer.log("foo");
+    EXPECT_EQ("foo", StubLogger::m);
+    EXPECT_EQ(3, StubLogger::t);
+    StubClock::t = 5;
+  }
+  ASSERT_EQ("message", StubLogger::m);
+  ASSERT_EQ(2, StubLogger::t);
+}
+
+TEST(TestAutoTimer, HandleRealTimer) {
+  AutoTimer<> t("Third message on destruction");
+  t.log("First message");
+  t.log("Second message");
+}