do not recrunch if dds is unchanged

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/runner.py b/tests/runner.py
index 861277e6..d840465d 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -7183,6 +7183,25 @@ fscanfed: 10 - hello
       code = open('a.out.js').read()
       assert 'SAFE_HEAP' in code, 'valid -s option had an effect'
 
+    def test_crunch(self):
+      # crunch should not be run if a .crn exists that is more recent than the .dds
+      shutil.copyfile(path_from_root('tests', 'ship.dds'), 'ship.dds')
+      time.sleep(0.1)
+      Popen(['python', FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
+      assert os.stat('test.data').st_size < 0.25*os.stat('ship.dds').st_size, 'Compressed should be much smaller than dds'
+      crunch_time = os.stat('ship.crn').st_mtime
+      dds_time = os.stat('ship.dds').st_mtime
+      assert crunch_time > dds_time, 'Crunch is more recent'
+      # run again, should not recrunch!
+      time.sleep(0.1)
+      Popen(['python', FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
+      assert crunch_time == os.stat('ship.crn').st_mtime, 'Crunch is unchanged'
+      # update dds, so should recrunch
+      time.sleep(0.1)
+      os.utime('ship.dds', None)
+      Popen(['python', FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
+      assert crunch_time < os.stat('ship.crn').st_mtime, 'Crunch was changed'
+
 elif 'browser' in str(sys.argv):
   # Browser tests.