Set up tests, add tests for common.util.time, add %d

tests/test_time.py

@@ -8,6 +8,11 @@ class FormatDurationTest(unittest.TestCase):
 
         return super().setUp()
 
+    def test_only_days(self):
+        delta = timedelta(days=3)
+        result = format_duration(delta, "%d days")
+        self.assertEqual(result, "3 days")
+
     def test_only_hours(self):
         delta = timedelta(hours=1)
         result = format_duration(delta, "%H hours")
@@ -23,7 +28,26 @@ class FormatDurationTest(unittest.TestCase):
         result = format_duration(delta, "%s seconds")
         self.assertEqual(result, "1 seconds")
 
-    def test_only_less_than_minute_seconds(self):
-        delta = timedelta(seconds=59)
-        result = format_duration(delta)
-        self.assertEqual(result, "less than a minute")
+    def test_only_rawseconds(self):
+        delta = timedelta(seconds=5690)
+        result = format_duration(delta, "%r total seconds")
+        self.assertEqual(result, "5690 total seconds")
+
+    def test_empty(self):
+        delta = timedelta()
+        result = format_duration(delta, "")
+        self.assertEqual(result, "")
+
+    def test_zero(self):
+        delta = timedelta()
+        result = format_duration(delta, "%r seconds")
+        self.assertEqual(result, "0 seconds")
+
+    def test_all_at_once(self):
+        delta = timedelta(days=50, hours=10, minutes=34, seconds=24)
+        result = format_duration(
+            delta, "%d days, %H hours, %m minutes, %s seconds, %r total seconds"
+        )
+        self.assertEqual(
+            result, "50 days, 10 hours, 34 minutes, 24 seconds, 4358064 total seconds"
+        )