Modified the remaining test cases to display more meaningful assert messages.
Added a generic message generator to the lldbtest.py base module.

llvm-svn: 110625
diff --git a/lldb/test/command_source/TestCommandSource.py b/lldb/test/command_source/TestCommandSource.py
index e1e2330..c9f151e 100644
--- a/lldb/test/command_source/TestCommandSource.py
+++ b/lldb/test/command_source/TestCommandSource.py
@@ -7,9 +7,9 @@
 import os, time
 import unittest2
 import lldb
-import lldbtest
+from lldbtest import *
 
-class TestCommandSource(lldbtest.TestBase):
+class TestCommandSource(TestBase):
 
     mydir = "command_source"
 
@@ -20,13 +20,13 @@
         # Sourcing .lldb in the current working directory, which in turn imports
         # the "my" package that defines the date() function.
         self.ci.HandleCommand("command source .lldb", res)
-        self.assertTrue(res.Succeeded())
+        self.assertTrue(res.Succeeded(), CMD_MSG('command source .lldb'))
 
         # Python should evaluate "my.date()" successfully.
         self.ci.HandleCommand("script my.date()", res)
         if (not res.Succeeded()):
             print res.GetError()
-        self.assertTrue(res.Succeeded())
+        self.assertTrue(res.Succeeded(), CMD_MSG('script my.date()'))
 
 
 if __name__ == '__main__':