display the full stack trace on failure.
Array of accepted globals.
string or regexp to filter tests with.
Enable growl support.
Do not show diffs at all.
ignore global leaks.
Use inline diffs rather than +/-.
Reporter constructor, built-in reporter name, or reporter module path. Defaults to
"spec".
number of times to retry failed tests.
milliseconds to wait before considering a test slow.
timeout in milliseconds.
Test interfaces ("bdd", "tdd", "exports", etc.).
Emit color output.
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bail on the first test failure.