A simple, terse, in-process reporter for the
tapetest harness for Node.js.
The Test Anything Protocol (TAP) used by many test harnesses is versatile, but it's not much to look at - or rather, it's too much to look at. There are many custom formatters that work with the tape test harness, but most work by piping process output. This is a useful technique, but interferes with the exit status of the test harness which is a problem in scripts that are meant to fail when tests fail (like npm test). (Though there are workarounds for this, they are shell- and platform-specific.)
Fortunately, tape offers an alternative logging mechanism via its createStream API. This technique is easy to use and runs in-process so it doesn't interfere with the exit status of the test harness. tape-player takes advantage of this to produce a concise test log that's easy to enable.
Install tape-player via:
npm install tape-player --save-dev
And add it to one or more tape-based test files via:
require("tape-player")
// Ignore return value
That's it - run those tests and you'll see nicely formatted output on the standard output device!
tape-player works with the tape CLI or directly in tape-based files (as with node test-file.js).
Example output:
passing test
failing test
/home/user/project/test/example.js:15:8
Message: oops
Operator: fail
passing test
Tests: 3
Asserts: 5
Failures: 1
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