tests: turn humantime test function into an unit test

tests/test_misc.py

@@ -1,6 +1,7 @@
 import pytest
 
 from wcs.qommon.form import FileSizeWidget
+from wcs.qommon.humantime import humanduration2seconds, seconds2humanduration
 
 def test_parse_file_size():
     assert FileSizeWidget.parse_file_size('17') == 17
@@ -19,3 +20,7 @@ def test_parse_invalid_file_size():
     for test_value in ('17i', 'hello', '0.4K', '2G'):
         with pytest.raises(ValueError):
             FileSizeWidget.parse_file_size(test_value)
+
+def test_humantime():
+    for x in range(3, 100000, 13):
+        assert humanduration2seconds(seconds2humanduration(x)) == x

wcs/qommon/humantime.py

@@ -87,9 +87,3 @@ def seconds2humanduration(seconds):
     if seconds:
         human.append(_("%s seconds") % seconds)
     return list2human(human)
-
-if __name__ == "__main__":
-    import random
-    for x in range(1,10000):
-        t = random.randint(1,100000)
-        assert humanduration2seconds(seconds2humanduration(t))