wic tests: Add docstrings to test methods

Docstrings make nosetests output more clear:

Test wic create --help ... ok
Test wic --help ... ok
Test wic list --help ... ok
Test wic create directdisk providing all artifacts. ... ok
Test wic create directdisk --image-name core-image-minimal ... ok

(From OE-Core rev: 3a7ea88528619fdc9d2a0cc0d136e339126e8861)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/tests/01_wic_test_help.py

@@ -28,13 +28,17 @@ class TestWicHelp(unittest.TestCase):
     """Test help output of wic (sub)commands"""
 
     def setUp(self):
+        """This code is executed before each test method."""
         self.main = imp.load_source("wic", "wic").main
 
     def testhelp(self):
+        """Test wic --help"""
         self.assertRaises(SystemExit, self.main, ['--help'])
 
     def testcreatehelp(self):
+        """Test wic create --help"""
         self.assertRaises(SystemExit, self.main, ['create', '--help'])
 
     def testlisthelp(self):
+        """Test wic list --help"""
         self.assertRaises(SystemExit, self.main, ['list', '--help'])

scripts/tests/02_wic_test_directdisk.py

@@ -48,10 +48,12 @@ class TestWicDirectdisk(unittest.TestCase):
                                 "directdisk-*.direct")))
 
     def testbuild_image_name(self):
+        """Test wic create directdisk --image-name core-image-minimal"""
         self._build(["create", "directdisk",
                      "--image-name", "core-image-minimal"])
 
     def testbuild_artifacts(self):
+        """Test wic create directdisk providing all artifacts."""
         self._build(["create", "directdisk",
                      "-b", "tmp/sysroots/qemux86/usr/share",
                      "-k", "tmp/deploy/images/qemux86",