uglify('this is not javascript!', {}, function (err, output) { refute(output) assert(err) assert(err instanceof Error) assert(err.cause) assert.isString(err.message) done() })
closure({ build: 'this is not javascript!' }, {}, {}, function (err, results) { refute(results) assert(err) assert(err instanceof Error) assert(err.stderr) assert.isString(err.message) done() })