Change the strategy for coping with time intensive tests from

"all or none" to "all or some".

This provides much greater test coverage without eating much time.
It also makes it more likely that routine regression testing will
unearth bugs.

1 files changed, 5 insertions, 1 deletions

diff --git a/Lib/test/test_compiler.py b/Lib/test/test_compiler.py
index bc2dd701a8..63cbc0080d 100644
--- a/Lib/test/test_compiler.py
+++ b/Lib/test/test_compiler.py
@@ -2,6 +2,7 @@ import compiler
 import os
 import test.test_support
 import unittest
+from random import random
 
 class CompilerTest(unittest.TestCase):
 
@@ -18,6 +19,8 @@ class CompilerTest(unittest.TestCase):
             for basename in os.listdir(dir):
                 if not basename.endswith(".py"):
                     continue
+                if not TEST_ALL and random() < 0.98:
+                    continue
                 path = os.path.join(dir, basename)
                 if test.test_support.verbose:
                     print "compiling", path
@@ -31,7 +34,8 @@ class CompilerTest(unittest.TestCase):
                     compiler.compile(buf, basename, "exec")
 
 def test_main():
-    test.test_support.requires("compiler")
+    global TEST_ALL
+    TEST_ALL = test.test_support.is_resource_enabled("compiler")
     test.test_support.run_unittest(CompilerTest)
 
 if __name__ == "__main__":