test.js
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'use strict';
var expect = require('expect.js');
var EventEmitter = require('events').EventEmitter;
var progress = require('../');
function normalizeStates(states) {
states.forEach(function (state) {
state.time.elapsed = Math.round(state.time.elapsed),
state.time.remaining = state.time.remaining != null ? Math.round(state.time.remaining) : null;
state.speed = state.speed != null ? Math.round(state.speed) : null;
});
}
describe('request-progress', function () {
var request;
var states;
beforeEach(function () {
states = [];
request = new EventEmitter();
request.on('progress', function (state) {
states.push(JSON.parse(JSON.stringify(state)));
});
});
it('should emit the progress event with the correct state information', function (done) {
progress(request, { throttle: 0 })
.on('end', function () {
normalizeStates(states);
expect(states).to.eql([{
percentage: 0.5,
speed: null,
size: { total: 10, transferred: 5, },
time: { elapsed: 0, remaining: null }
}, {
percentage: 0.8,
speed: 7,
size: { total: 10, transferred: 8 },
time: { elapsed: 1, remaining: 0 }
}, {
percentage: 1,
speed: 8,
size: { total: 10, transferred: 10 },
time: { elapsed: 1, remaining: 0 }
}]);
done();
});
request.emit('request');
request.emit('response', { headers: { 'content-length': 10 } });
setTimeout(function () {
request.emit('data', new Buffer('aaaaa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bbb'));
}, 1150);
setTimeout(function () {
request.emit('data', new Buffer('cc'));
request.emit('end');
}, 1250);
});
it('should provide request.progressState (and request.progressContext)', function (done) {
progress(request, { throttle: 0 })
.on('end', function () {
expect(request.progressState).to.be(null);
expect(request.progressContext).to.be(null);
done();
});
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be(undefined);
request.emit('request');
request.emit('response', { headers: { 'content-length': 2 } });
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be.an('object');
setTimeout(function () {
request.emit('data', new Buffer('a'));
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be.an('object');
expect(request.progressState.percentage).to.be(0.5);
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('b'));
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be.an('object');
expect(request.progressState.percentage).to.be(1);
request.emit('end');
}, 100);
});
it('should have a option.delay default of 0', function () {
progress(request);
expect(request.progressContext.options.delay).to.be(0);
});
it('should respect the passed option.delay', function (done) {
progress(request, { throttle: 0, delay: 250 })
.on('end', function () {
expect(states).to.have.length(2);
expect(states[0].percentage).to.be(0.6);
expect(states[1].percentage).to.be(1);
done();
});
request.emit('request');
request.emit('response', { headers: { 'content-length': 10 } });
setTimeout(function () {
request.emit('data', new Buffer('aa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bb'));
}, 200);
setTimeout(function () {
request.emit('data', new Buffer('cc'));
}, 300);
setTimeout(function () {
request.emit('data', new Buffer('dddd'));
request.emit('end');
}, 400);
});
it('should have a option.throttle default of 1000', function () {
progress(request);
expect(request.progressContext.options.throttle).to.be(1000);
});
it('should respect the passed option.throttle', function (done) {
progress(request, { throttle: 300, delay: 0 })
.on('end', function () {
expect(states).to.have.length(3);
expect(states[0].percentage).to.be(0.2);
expect(states[1].percentage).to.be(0.6);
expect(states[2].percentage).to.be(0.9);
done();
});
request.emit('request');
request.emit('response', { headers: { 'content-length': 10 } });
setTimeout(function () {
request.emit('data', new Buffer('aa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bb'));
}, 100);
setTimeout(function () {
request.emit('data', new Buffer('cc'));
}, 300);
setTimeout(function () {
request.emit('data', new Buffer('dd'));
}, 400);
setTimeout(function () {
request.emit('data', new Buffer('e'));
}, 500);
setTimeout(function () {
request.emit('data', new Buffer('bf'));
request.emit('end');
}, 700);
});
it('should have a option.lengthHeader default of "content-length"', function () {
progress(request);
expect(request.progressContext.options.lengthHeader).to.be('content-length');
});
it('should use option.lengthHeader', function (done) {
progress(request, {
throttle: 0,
lengthHeader: 'x-transfer-length'
})
.on('end', function () {
expect(states).to.have.length(2);
expect(states[0].percentage).to.be(0.5);
expect(states[0].size.total).to.be(10);
expect(states[1].percentage).to.be(1);
expect(states[1].size.total).to.be(10);
done();
});
request.emit('request');
request.emit('response', {
headers: { 'x-transfer-length': 10, 'content-length': 5 }
});
setTimeout(function () {
request.emit('data', new Buffer('aaaaa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bbbbb'));
request.emit('end');
}, 200);
});
it('should fail if response is already set', function () {
request.response = { headers: { 'content-length': 10 } };
expect(function () {
progress(request);
}).to.throwException(/too late/);
});
it('should deal with unknown content length', function (done) {
progress(request, { throttle: 0 })
.on('end', function () {
normalizeStates(states);
expect(states).to.eql([{
percentage: null,
speed: null,
size: { total: null, transferred: 5, },
time: { elapsed: 0, remaining: null }
}, {
percentage: null,
speed: 10,
size: { total: null, transferred: 12, },
time: { elapsed: 1, remaining: null }
}]);
done();
});
request.emit('request');
request.emit('response', { headers: {} });
setTimeout(function () {
request.emit('data', new Buffer('aaaaa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bbbbbbb'));
request.emit('end');
}, 1150);
});
it('should deal with payloads higher than the content length', function (done) {
progress(request, { throttle: 0 })
.on('end', function () {
normalizeStates(states);
expect(states).to.eql([{
percentage: 0.5,
speed: null,
size: { total: 10, transferred: 5, },
time: { elapsed: 0, remaining: null }
}, {
percentage: 1,
speed: 10,
size: { total: 10, transferred: 12 },
time: { elapsed: 1, remaining: 0 }
}]);
done();
});
request.emit('request');
request.emit('response', { headers: { 'content-length': 10 } });
setTimeout(function () {
request.emit('data', new Buffer('aaaaa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bbbbbbb'));
request.emit('end');
}, 1150);
});
it('should not report after the request ends', function (done) {
progress(request, { throttle: 100 });
request.emit('request');
request.emit('response', { headers: { 'content-length': 10 } });
setTimeout(function () {
request.emit('data', new Buffer('aa'));
}, 25);
setTimeout(function () {
request.emit('data', new Buffer('bbbbbbbb'));
request.emit('end');
}, 50);
setTimeout(function () {
normalizeStates(states);
expect(states).to.have.length(1);
expect(states[0].percentage).to.be(0.2);
done();
}, 500);
});
it('should not generate duplicate progress events if called twice', function (done) {
progress(request, { throttle: 0 });
progress(request, { throttle: 0 })
.on('end', function () {
expect(states).to.have.length(1);
expect(states[0].percentage).to.be(1);
done();
});
request.emit('request');
request.emit('response', { headers: { 'content-length': 2 } });
setTimeout(function () {
request.emit('data', new Buffer('aa'));
request.emit('end');
}, 25);
});
it('should reset stuff on "request" event', function () {
progress(request, { throttle: 0 });
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be(undefined);
request.emit('request');
request.emit('response', { headers: { 'content-length': 2 } });
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be.an('object');
request.emit('request');
expect(request.progressContext).to.be.an('object');
expect(request.progressState).to.be(null);
});
});