[Piglit] [PATCH 18/18] exectest.py: Use ABC for Test

[Dylan Baker]

This uses the Abstract Base Class metaclass for Test, and it's
decorators to mark abstract classes. This has a couple of nice
advantages, first the abstract class cannot be initialized. Second, the
methods that are marked abstract must be overwritten in children or
initializing them will raise an error. Third, it is very easy to see
which methods need to be overwritten, even with an editor that folds
code.

Signed-off-by: Dylan Baker <baker.dylan.c at gmail.com>
---
 framework/exectest.py            | 6 +++++-
 framework/tests/exectest_test.py | 5 -----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/framework/exectest.py b/framework/exectest.py
index e5f98ae..b507c5f 100644
--- a/framework/exectest.py
+++ b/framework/exectest.py
@@ -30,6 +30,7 @@ import time
 import sys
 import traceback
 import itertools
+import abc
 try:
     import simplejson as json
 except ImportError:
@@ -69,6 +70,7 @@ class Test(object):
     run_concurrent -- If True the test is thread safe. Default: False
 
     """
+    __metaclass__ = abc.ABCMeta
     __slots__ = ['run_concurrent', 'env', 'result', 'cwd', '_command',
                  '_test_hook_execute_run']
 
@@ -143,8 +145,10 @@ class Test(object):
             return
         self._command = value
 
+    @abc.abstractmethod
     def interpret_result(self):
-        raise NotImplementedError
+        """ Convert the raw output of the test into a form piglit understands
+        """
 
     def run(self):
         """
diff --git a/framework/tests/exectest_test.py b/framework/tests/exectest_test.py
index d6d31af..935719d 100644
--- a/framework/tests/exectest_test.py
+++ b/framework/tests/exectest_test.py
@@ -39,11 +39,6 @@ class TestTest(Test):
 
 
 # Tests
-def test_initialize_test():
-    """ Test initializes """
-    Test('/bin/true')
-
-
 def test_initialize_piglittest():
     """ Test that PiglitTest initializes correctly """
     PiglitTest('/bin/true')
-- 
2.0.0