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Add documentation of reftest analyzer to wpt README

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jgraham 2015-06-02 23:24:24 +01:00
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tests/wpt/README.md
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@ -134,3 +134,21 @@ The `mozilla` directory contains tests that cannot be upstreamed for some
reason (e.g. because they depend on Servo-specific APIs), as well as some reason (e.g. because they depend on Servo-specific APIs), as well as some
legacy tests that should be upstreamed at some point. When run they are legacy tests that should be upstreamed at some point. When run they are
mounted on the server under `/_mozilla/`. mounted on the server under `/_mozilla/`.
Analyzing reftest results
=========================
Reftest results can be analyzed from a raw log file. To generate this run
with the `--log-raw` option e.g.
./mach test-css --log-raw css.log
This file can then be fed into the
[reftest analyzer](http://hoppipolla.co.uk/410/reftest-analyser-structured.xhtml)
which will show all failing tests (not just those with unexpected results).
Note that this ingests logs in a different format to original version of the
tool written for gecko reftests.
The reftest analyzer allows pixel-level comparison of the test and reference
screenshots. Tests that both fail and have an unexpected result are marked
with a `!`.