tap-difflet

library0.7.2jsnpmunverified

TAP output formatter that uses difflet to provide visual diffing for inequality errors. Version 0.7.2 is the latest stable release. The package has been in maintenance mode since around 2015 with no recent updates. It is CLI tool that pipes TAP output from test runners like tape or mocha and formats results with colored diffs. Supports options like pessimistic mode to show only failures. Unlike other TAP reporters, it focuses on providing clear visual diffs for failing assertions.

testing

npm install tap-difflet

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · TAP-DIFFLET

tap-difflet

testingjavascriptv0.7.2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

tapDifflet

✓ const tapDifflet = require('tap-difflet');

✗ import tapDifflet from 'tap-difflet';

Package uses CommonJS and does not support ESM. TypeScript may need @types/tap-difflet.

Demonstrates CLI usage with tape and programmatic usage inside Node.js code.

# Install globally for CLI usage npm install -g tap-difflet # Run tests with tape and pipe to tap-difflet tape test/*.js | tap-difflet # Only show failed tests tape test/*.js | tap-difflet -p # Programmatic usage in Node.js const tapDifflet = require('tap-difflet'); const formatter = tapDifflet({ pessimistic: false }); process.stdin.pipe(formatter).pipe(process.stdout);

Debug

Known issues

deprecatedPackage is no longer actively maintained. Last release was in 2015.

fix

Consider alternatives like tap-spec or faucet.

affects: >=0.0.0

gotchaOnly works with TAP-producing test runners like tape, not with mocha's default reporter.

fix

Use tape, node-tap, or configure mocha to output TAP.

affects: >=0.0.0

gotchaOutputs to stdout by default; error output goes to stderr but may not be shown.

fix

To capture all output, redirect stderr: `tape test/*.js | tap-difflet 2>&1`

affects: >=0.0.0

Errors

Common errors & fixes

Error: Cannot find module 'tap-difflet'

Package not installed or not in node_modules.

fix

Run `npm install tap-difflet --save-dev` or `npm install -g tap-difflet`.

TypeError: tapDifflet is not a function

Using ES import syntax on a CommonJS module without default import interop.

fix

Use `const tapDifflet = require('tap-difflet');` instead of `import tapDifflet from 'tap-difflet';`

** 2 failing

tap-difflet only shows summary for tests it doesn't understand.

fix

Ensure your test runner outputs valid TAP format. Use `tape` or `node-tap`.

Upgrade

Version history

0.7.2latest on npm

Audit

Dependencies

diffletrequiredUsed to generate colorful diffs for inequality errors

duplexerrequiredUsed to create a stream that writes to both stdout and stderr

tap-format-taprequiredParses TAP output from stdin

Agent activity

8 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/namuol/tap-difflet ↗

packagetap-difflet ↗

homepagehttps://github.com/namuol/tap-difflet ↗