I am trying to write a test that checks whether an API route outputs a ZIP file with the correct contents.
I am using mocha and supertest for testing, and I would like to actually read the output stream/buffer, read the zip file contents and see if the contents are correct.
Any ideas how should I do it? When I try to read res.body
, it's just an empty object.
request(app)
.get( "/api/v1/orders/download?id[]=1&id=2" )
.set( "Authorization", authData )
.expect( 200 )
.expect( 'Content-Type', /application\/zip/ )
.end( function (err, res) {
if (err) return done( err );
console.log( 'body:', res.body )
// Write the temp HTML file to filesystem using utf-8 encoding
var zip = new AdmZip( res.body );
var zipEntries = zip.getEntries();
console.log( 'zipentries:', zipEntries );
zipEntries.forEach(function(zipEntry) {
console.log(zipEntry.toString()); // outputs zip entries information
});
done();
});
Expanding on @Beau's answer, the following can be used to get any binary response content as a Buffer which you can examine further in request.end()
:
function binaryParser(res, callback) {
res.setEncoding('binary');
res.data = '';
res.on('data', function (chunk) {
res.data += chunk;
});
res.on('end', function () {
callback(null, new Buffer(res.data, 'binary'));
});
}
// example mocha test
it('my test', function(done) {
request(app)
.get('/path/to/image.png')
.expect(200)
.expect('Content-Type', 'image.png')
.buffer()
.parse(binaryParser)
.end(function(err, res) {
if (err) return done(err);
// binary response data is in res.body as a buffer
assert.ok(Buffer.isBuffer(res.body));
console.log("res=", res.body);
done();
});
});