diff options
| author |  jcgregorio <jcgregorio@google.com> | 2015-05-22 10:42:13 -0700 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2015-05-22 10:42:13 -0700 |
| commit | 92c9743d2db758429b78750e749099ded79fd5d1 (patch) | |
| tree | bffdff45795562484fb71631a35ed3101e4f6ed8 /site | |
| parent | 424cc26add7ed491c6941d0c0c3a0e6d83190307 (diff) | |
Add more detail on how DM checksums are done.
This will be linked to from Gold for image diffs that have
different digests but no pixel differences.
BUG=skia:
NOTRY=true
DOCS_PREVIEW= https://skia.org/?cl=1151153005
Review URL: https://codereview.chromium.org/1151153005
Diffstat (limited to 'site')
| -rw-r--r-- | site/dev/testing/testing.md | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/site/dev/testing/testing.md b/site/dev/testing/testing.md index 1ed56235bf..356c74236b 100644 --- a/site/dev/testing/testing.md +++ b/site/dev/testing/testing.md @@ -127,8 +127,13 @@ can be found at dm_output/8888/image/mandrill_132x132_12x12.astc-5-subsets.png. dm.json is used by our automated testing system, so you can ignore it if you like. It contains a listing of each test run and a checksum of the image -generated for that run. (Boring technical detail: it is not a checksum of the -.png file, but rather a checksum of the raw pixels used to create that .png.) +generated for that run. + +### Detail <a name="digests"></a> +Boring technical detail: The checksum is not a checksum of the +.png file, but rather a checksum of the raw pixels used to create that .png. +That means it is possible for two different configurations to produce +the same exact .png, but have their checksums differ. Unit tests don't generally output anything but a status update when they pass. If a test fails, DM will print out its assertion failures, both at the time |