rebuild in response to changed .c file

1 files changed, 14 insertions, 5 deletions

diff --git a/test/option-j.py b/test/option-j.py
index 90d036d..cc8efa4 100644
--- a/test/option-j.py
+++ b/test/option-j.py
@@ -36,9 +36,10 @@ env.MyBuild(target = 'f1', source = 'f1.in')
 env.MyBuild(target = 'f2', source = 'f2.in')
 """)
 
-def RunTest(args):
-    test.write('f1.in', 'f1.in')
-    test.write('f2.in', 'f2.in')
+def RunTest(args, extra):
+    """extra is used to make scons rebuild the output file"""
+    test.write('f1.in', 'f1.in'+extra)
+    test.write('f2.in', 'f2.in'+extra)
 
     test.run(arguments = args)
 
@@ -50,13 +51,21 @@ def RunTest(args):
 
     return start2, finish1
 
-start2, finish1 = RunTest('-j 2 f1 f2')
+start2, finish1 = RunTest('-j 2 f1 f2', "first")
 
 # fail if the second file was not started
 # before the first one was finished
 test.fail_test(not (start2 < finish1))
 
-start2, finish1 = RunTest('f1 f2')
+s2, f1 = RunTest('-j 2 f1 f2', "first")
+
+# re-run the test with the same input, fail if we don't
+# get back the same times, which would indicate that
+# SCons rebuilt the files even though nothing changed
+test.fail_test(start2 != s2)
+test.fail_test(finish1 != f1)
+
+start2, finish1 = RunTest('f1 f2', "second")
 
 # fail if the second file was started
 # before the first one was finished