it('should render a series of sync and async calls correctly', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut1 = out.beginAsync();
setTimeout(function () {
asyncOut1.write('2');
asyncOut1.end();
}, 100);
out.write('3');
var asyncOut2 = out.beginAsync();
setTimeout(function () {
asyncOut2.write('4');
asyncOut2.end();
}, 10);
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('1234');
done();
});
});
it('should allow an async fragment to flush last asynchronously', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut = out.beginAsync({ last: true });
var lastFiredCount = 0;
out.on('last', function () {
lastFiredCount++;
});
out.once('last', function () {
setTimeout(function () {
asyncOut.write('2');
asyncOut.end();
}, 10);
});
out.write('3');
out.end();
out.on('finish', function (result) {
expect(lastFiredCount).to.equal(1);
var output = result.getOutput();
expect(output).to.equal('123');
done();
});
});
it('should render nested async calls correctly', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut = out.beginAsync();
setTimeout(function () {
asyncOut.write('2a');
var nestedAsyncContext = asyncOut.beginAsync();
setTimeout(function () {
nestedAsyncContext.write('2b');
nestedAsyncContext.end();
}, 10);
asyncOut.write('2c');
asyncOut.end();
}, 10);
out.write('3');
var asyncOut2 = out.beginAsync();
setTimeout(function () {
var nestedAsyncContext = asyncOut2.beginAsync();
setTimeout(function () {
nestedAsyncContext.write('4a');
nestedAsyncContext.end();
}, 10);
var nestedAsyncContext2 = asyncOut2.beginAsync();
setTimeout(function () {
nestedAsyncContext2.write('4b');
nestedAsyncContext2.end();
}, 10);
asyncOut2.write('4c');
asyncOut2.end();
}, 10);
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('12a2b2c34a4b4c');
done();
});
});
setTimeout(function () {
var asyncOut = out.beginAsync({ name: 'inner' });
setTimeout(function () {
asyncOut.write('2');
asyncOut.end();
}, 50);
out.write('3');
out.end();
}, 10);
it('should allow multiple onLast calls', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut1 = out.beginAsync();
setTimeout(function () {
asyncOut1.write('2');
asyncOut1.end();
}, 20);
var asyncOut2 = out.beginAsync({ last: true });
var onLastCount = 0;
var lastOutput = [];
out.onLast(function (next) {
onLastCount++;
lastOutput.push('a');
asyncOut2.write('3');
asyncOut2.end();
setTimeout(next, 10);
});
var asyncOut3 = out.beginAsync({ last: true });
out.onLast(function (next) {
onLastCount++;
lastOutput.push('b');
asyncOut3.write('4');
asyncOut3.end();
next();
});
out.write('5');
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('12345');
expect(onLastCount).to.equal(2);
expect(lastOutput).to.deep.equal(['a', 'b']);
done();
});
});
it('should allow the async callback to provide data', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut = out.beginAsync();
setTimeout(function () {
asyncOut.end('2');
}, 10);
out.write('3');
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('123');
done();
});
});
it('should allow an async fragment to flush last', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut = out.beginAsync({ last: true });
out.once('last', function () {
asyncOut.write('2');
asyncOut.end();
});
out.write('3');
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('123');
done();
});
});
it('should support piping to an async writer', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut = out.beginAsync();
var helloReadStream = fs.createReadStream(nodePath.join(__dirname, 'fixtures/AsyncStream/hello.txt'), fsReadOptions);
helloReadStream.pipe(asyncOut);
out.write('2');
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('1Hello World2');
done();
});
});
it('should allow an async fragment to complete synchronously', function (done) {
var out = new AsyncStream();
out.write('1');
var asyncOut = out.beginAsync();
setTimeout(function () {
asyncOut.write('2');
asyncOut.end();
}, 10);
out.write('3');
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(output).to.equal('123');
done();
});
});
it('should handle sync errors correctly', function (done) {
var out = new AsyncStream();
var errors = [];
out.on('error', function (e) {
errors.push(e);
});
out.write('1');
var asyncOut = out.beginAsync();
setTimeout(function () {
asyncOut.error(new Error('test'));
}, 10);
out.write('3');
out.end();
out.on('finish', function (result) {
var output = result.getOutput();
expect(errors.length).to.equal(1);
expect(output).to.equal('13');
done();
});
});
it('should catch error in promise catch', function (done) {
const out = new AsyncStream();
let errors = [];
out.on('error', function (e) {
errors.push(e);
});
out.write('1');
let asyncOut = out.beginAsync();
setTimeout(function () {
asyncOut.error(new Error('test'));
}, 10);
out.write('3');
out.end().catch(err => {
expect(errors.length).to.equal(1);
expect(err).to.be.an('error');
done();
});
});
it('should handle timeouts correctly', function (done) {
var out = new AsyncStream();
var errors = [];
out.on('error', function (e) {
errors.push(e);
});
out.write('1');
var asyncOut = out.beginAsync({ timeout: 100, name: 'test' });
setTimeout(function () {
asyncOut.write('2');
asyncOut.end();
}, 200);
out.write('3');
out.end();
out.on('finish', function (result) {
expect(errors.length).to.equal(1);
expect(result.getOutput()).to.equal('13');
done();
});
});