Squashed commit of the following:

commit 1c2cf82a424125decda210a557755e8467bf0b2b
Author: Jesse Jaggars <jjaggars@redhat.com>
Date:   Tue Mar 13 15:20:47 2012 -0500

    adding regex sub tests and some docstrings

commit d72f2f28b364519710f95a53330821138fc40849
Author: Jesse Jaggars <jjaggars@redhat.com>
Date:   Tue Mar 13 11:13:06 2012 -0500

    adding many tests for plugins

1 files changed, 13 insertions, 1 deletions

diff --git a/tests/utilities_tests.py b/tests/utilities_tests.py
index 7eecc01a..24bc950b 100644
--- a/tests/utilities_tests.py
+++ b/tests/utilities_tests.py
@@ -2,7 +2,7 @@ import os.path
 import unittest
 from StringIO import StringIO
 
-from sos.utilities import grep, DirTree, checksum, get_hash_name, is_executable, sosGetCommandOutput, find
+from sos.utilities import grep, DirTree, checksum, get_hash_name, is_executable, sosGetCommandOutput, find, tail
 import sos
 
 TEST_DIR = os.path.dirname(__file__)
@@ -28,6 +28,18 @@ class GrepTest(unittest.TestCase):
         self.assertEquals(matches, ['import unittest\n'])
 
 
+class TailTest(unittest.TestCase):
+
+    def test_tail(self):
+        t = tail("tests/tail_test.txt", 10)
+        self.assertEquals(t, "last line\n")
+
+    def test_tail_too_many(self):
+        t = tail("tests/tail_test.txt", 200)
+        expected = open("tests/tail_test.txt", "r").read()
+        self.assertEquals(t, expected)
+
+
 class DirTreeTest(unittest.TestCase):
 
     def test_makes_tree(self):