From 62229f14da8d7794f73491c28db47fd9e1c25b3f Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Wed, 1 Apr 2020 16:16:11 +0200
Subject: [PATCH] test/time: add test for LocalTime(), GmTime()

---
 test/time/TestConvert.cxx | 65 +++++++++++++++++++++++++++++++++++++++
 test/time/meson.build     |  1 +
 2 files changed, 66 insertions(+)
 create mode 100644 test/time/TestConvert.cxx

diff --git a/test/time/TestConvert.cxx b/test/time/TestConvert.cxx
new file mode 100644
index 000000000..ff31d7097
--- /dev/null
+++ b/test/time/TestConvert.cxx
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2020 Max Kellermann <max.kellermann@gmail.com>
+ * All rights reserved.
+ *
+ * author: Max Kellermann <mk@cm4all.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "time/Convert.hxx"
+
+#include <gtest/gtest.h>
+
+static constexpr time_t times[] = {
+	1234567890,
+	1580566807,
+	1585750807,
+	1590934807,
+};
+
+TEST(Time, LocalTime)
+{
+	/* convert back and forth using local time zone */
+
+	for (const auto t : times) {
+		auto tp = std::chrono::system_clock::from_time_t(t);
+		auto tm = LocalTime(tp);
+		EXPECT_EQ(MakeTime(tm), tp);
+	}
+}
+
+TEST(Time, GmTime)
+{
+	/* convert back and forth using UTC */
+
+	for (const auto t : times) {
+		auto tp = std::chrono::system_clock::from_time_t(t);
+		auto tm = GmTime(tp);
+		EXPECT_EQ(std::chrono::system_clock::to_time_t(TimeGm(tm)),
+			  t);
+	}
+}
diff --git a/test/time/meson.build b/test/time/meson.build
index 0aba67ac2..53b583cf1 100644
--- a/test/time/meson.build
+++ b/test/time/meson.build
@@ -1,4 +1,5 @@
 test_time_sources = [
+  'TestConvert.cxx',
   'TestISO8601.cxx',
 ]