--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/js-elapsedtimer/main.cpp	Mon Feb 08 16:43:14 2016 +0100
@@ -0,0 +1,116 @@
+/*
+ * main.cpp -- test Irccd.ElapsedTimer API
+ *
+ * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <gtest/gtest.h>
+
+#include <thread>
+
+#include <js-irccd.h>
+#include <js-elapsed-timer.h>
+
+using namespace irccd;
+using namespace std::chrono_literals;
+
+/*
+ * For all tests, we tolerate 30 ms because some systems have bigger lags.
+ */
+static constexpr int margin = 30;
+
+class TestElapsedTimer : public testing::Test {
+protected:
+	js::Context m_context;
+
+	TestElapsedTimer()
+	{
+		loadJsIrccd(m_context);
+		loadJsElapsedTimer(m_context);
+	}
+
+	inline void assertRange(int value, int expected) const noexcept
+	{
+		if (value < (expected - margin) || value > (expected + margin))
+			FAIL() << value << " is bigger than [" << (expected - margin) << ", " << (expected + margin) << "]";
+	}
+};
+
+TEST_F(TestElapsedTimer, standard)
+{
+	m_context.peval(js::Script{"timer = new Irccd.ElapsedTimer();"});
+
+	std::this_thread::sleep_for(300ms);
+
+	m_context.peval(js::Script{"result = timer.elapsed();"});
+	assertRange(m_context.getGlobal<int>("result"), 300);
+}
+
+TEST_F(TestElapsedTimer, reset)
+{
+	m_context.peval(js::Script{"timer = new Irccd.ElapsedTimer();"});
+
+	std::this_thread::sleep_for(300ms);
+
+	m_context.peval(js::Script{"timer.reset(); result = timer.elapsed();"});
+	assertRange(m_context.getGlobal<int>("result"), 0);
+}
+
+TEST_F(TestElapsedTimer, pause)
+{
+	m_context.peval(js::Script{"timer = new Irccd.ElapsedTimer();"});
+
+	/*
+	 * Simulate a pause in the game like this:
+	 *
+	 * start     pause restart elapsed
+	 * |   10ms   |.5ms.| 6ms  |
+	 *
+	 * Since the game was paused, the 5ms must not be totalized.
+	 */
+	std::this_thread::sleep_for(10ms);
+
+	m_context.peval(js::Script{"timer.pause();"});
+
+	std::this_thread::sleep_for(5ms);
+
+	m_context.peval(js::Script{"timer.restart();"});
+
+	std::this_thread::sleep_for(6ms);
+
+	m_context.peval(js::Script{"result = timer.elapsed()"});
+	assertRange(m_context.getGlobal<int>("result"), 16);
+}
+
+TEST_F(TestElapsedTimer, doublecheck)
+{
+	m_context.peval(js::Script{"timer = new Irccd.ElapsedTimer();"});
+
+	std::this_thread::sleep_for(50ms);
+
+	m_context.peval(js::Script{"result = timer.elapsed()"});
+
+	std::this_thread::sleep_for(50ms);
+
+	m_context.peval(js::Script{"result = timer.elapsed()"});
+	assertRange(m_context.getGlobal<int>("result"), 100);
+}
+
+int main(int argc, char **argv)
+{
+	testing::InitGoogleTest(&argc, argv);
+
+	return RUN_ALL_TESTS();
+}