1 files changed, 84 insertions, 0 deletions
diff --git a/src/common/human_time_diff_test.cpp b/src/common/human_time_diff_test.cpp
new file mode 100644
index 0000000..d11a116
--- /dev/null
+++ b/src/common/human_time_diff_test.cpp
@@ -0,0 +1,84 @@
+#include "human_time_diff.hpp"
+
+#include <gtest/gtest.h>
+
+// a sequence of [-+]?[0-9]+([ay]|m|[jd]|h|mn|s)
+
+TEST(humantimediff, single)
+{
+    HumanTimeDiff diff;
+
+    EXPECT_TRUE(extract("42y", &diff));
+    EXPECT_EQ(42, diff.year);
+    EXPECT_EQ(0, diff.month);
+    EXPECT_EQ(0, diff.day);
+    EXPECT_EQ(0, diff.hour);
+    EXPECT_EQ(0, diff.minute);
+    EXPECT_EQ(0, diff.second);
+
+    EXPECT_TRUE(extract("42m", &diff));
+    EXPECT_EQ(0, diff.year);
+    EXPECT_EQ(42, diff.month);
+    EXPECT_EQ(0, diff.day);
+    EXPECT_EQ(0, diff.hour);
+    EXPECT_EQ(0, diff.minute);
+    EXPECT_EQ(0, diff.second);
+
+    EXPECT_TRUE(extract("42d", &diff));
+    EXPECT_EQ(0, diff.year);
+    EXPECT_EQ(0, diff.month);
+    EXPECT_EQ(42, diff.day);
+    EXPECT_EQ(0, diff.hour);
+    EXPECT_EQ(0, diff.minute);
+    EXPECT_EQ(0, diff.second);
+
+    EXPECT_TRUE(extract("42h", &diff));
+    EXPECT_EQ(0, diff.year);
+    EXPECT_EQ(0, diff.month);
+    EXPECT_EQ(0, diff.day);
+    EXPECT_EQ(42, diff.hour);
+    EXPECT_EQ(0, diff.minute);
+    EXPECT_EQ(0, diff.second);
+
+    EXPECT_TRUE(extract("42mn", &diff));
+    EXPECT_EQ(0, diff.year);
+    EXPECT_EQ(0, diff.month);
+    EXPECT_EQ(0, diff.day);
+    EXPECT_EQ(0, diff.hour);
+    EXPECT_EQ(42, diff.minute);
+    EXPECT_EQ(0, diff.second);
+
+    EXPECT_TRUE(extract("42s", &diff));
+    EXPECT_EQ(0, diff.year);
+    EXPECT_EQ(0, diff.month);
+    EXPECT_EQ(0, diff.day);
+    EXPECT_EQ(0, diff.hour);
+    EXPECT_EQ(0, diff.minute);
+    EXPECT_EQ(42, diff.second);
+
+    EXPECT_TRUE(extract("+42y", &diff));
+    EXPECT_EQ(42, diff.year);
+    EXPECT_TRUE(extract("-42y", &diff));
+    EXPECT_EQ(-42, diff.year);
+    EXPECT_FALSE(extract("++42y", &diff));
+    EXPECT_FALSE(extract("+-42y", &diff));
+    EXPECT_FALSE(extract("-+42y", &diff));
+    EXPECT_FALSE(extract("--42y", &diff));
+    EXPECT_FALSE(extract("4+2y", &diff));
+    EXPECT_FALSE(extract("42z", &diff));
+}
+
+TEST(humantimediff, multiple)
+{
+    HumanTimeDiff diff;
+
+    EXPECT_TRUE(extract("42y23m-2d", &diff));
+    EXPECT_EQ(42, diff.year);
+    EXPECT_EQ(23, diff.month);
+    EXPECT_EQ(-2, diff.day);
+    EXPECT_EQ(0, diff.hour);
+    EXPECT_EQ(0, diff.minute);
+    EXPECT_EQ(0, diff.second);
+    EXPECT_FALSE(extract("1y2y", &diff));
+}
+