Non-ascii characters in error messages can cause exceptions when processing
structured log messages. The mochitest MessageLogger already handles such
cases; this is a simpler implementation for the reftest OutputHandler.
Ensure that the first line of the log for failing tests is identical to
one that would be produced by the tbplformatter from mozlog. This means
that treeherder will be able to sucessfully cross-match error lines.
Also make the data structures used for storing screenshots identical
between reftests and web-platform-tests so that we can start to move
toward removing the reftest-specific codepath here.
MozReview-Commit-ID: FZQXLjj9Ejv
Structured logs bring many benefits. We can stop parsing the logs for magic strings, we
can modify the format without breaking things, and we can stream results into systems like
ActiveData. The structured logs originate primarily in reftest.js. StructuredLog.jsm is
used to generate the JSON-based log stream. Finally OutputHandler in the python harness
reads structured output from stdout, and formats it into human readable form.
MozReview-Commit-ID: G3ZLkMRl6p7
Structured logs bring many benefits. We can stop parsing the logs for magic strings, we
can modify the format without breaking things, and we can stream results into systems like
ActiveData. The structured logs originate primarily in reftest.js. StructuredLog.jsm is
used to generate the JSON-based log stream. Finally OutputHandler in the python harness
reads structured output from stdout, and formats it into human readable form.
