[tests] Add tests for bumblebee.util

Add tests for the utility functions and fix a few embarrassing bugs in
the process.

tests/test_util.py

@@ -0,0 +1,25 @@
+# pylint: disable=C0103,C0111
+
+import unittest
+
+from bumblebee.util import *
+
+class TestUtil(unittest.TestCase):
+    def test_bytefmt(self):
+        value = 10
+        display = 10
+        units = [ "B", "KiB", "MiB", "GiB" ]
+        for unit in units:
+            self.assertEquals(bytefmt(value), "{:.2f}{}".format(display, unit))
+            value *= 1024
+        self.assertEquals(bytefmt(value), "{:.2f}GiB".format(display*1024))
+
+    def test_durationfmt(self):
+        self.assertEquals(durationfmt(00), "00:00")
+        self.assertEquals(durationfmt(25), "00:25")
+        self.assertEquals(durationfmt(60), "01:00")
+        self.assertEquals(durationfmt(119), "01:59")
+        self.assertEquals(durationfmt(3600), "01:00:00")
+        self.assertEquals(durationfmt(7265), "02:01:05")
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4