BaseTools/Tests: Always add BaseTools source to import path

This allows unit tests to easily include BaseTools python
modules. This is very useful for writing unit tests.

Actually, previously, we would do this when RunTests.py was executed,
so unit tests could easily import BaseTools modules, so long as they
were executed via RunTests.

This change allows running the unit test files individually which can
be faster for developing the new unit test cases.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Yingke Liu <yingke.d.liu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17691 6f19259b-4bc3-4df7-8a09-765794883524

BaseTools/Tests/RunTests.py

@@ -21,8 +21,6 @@ import unittest
 
 import TestTools
 
-sys.path.append(TestTools.PythonSourceDir)
-
 def GetCTestSuite():
     import CToolsTests
     return CToolsTests.TheTestSuite()

BaseTools/Tests/TestTools.py

@@ -1,7 +1,7 @@
 ## @file
 # Utility functions and classes for BaseTools unit tests
 #
-#  Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -31,6 +31,13 @@ CSourceDir = os.path.join(BaseToolsDir, 'Source', 'C')
 PythonSourceDir = os.path.join(BaseToolsDir, 'Source', 'Python')
 TestTempDir = os.path.join(TestsDir, 'TestTempDir')
 
+if PythonSourceDir not in sys.path:
+    #
+    # Allow unit tests to import BaseTools python modules. This is very useful
+    # for writing unit tests.
+    #
+    sys.path.append(PythonSourceDir)
+
 def MakeTheTestSuite(localItems):
     tests = []
     for name, item in localItems.iteritems():