110 lines
2.3 KiB
JavaScript
110 lines
2.3 KiB
JavaScript
var expect = require('chai').expect
|
|
, unique = require('..')
|
|
, Stream = require('stream')
|
|
, after = require('after')
|
|
, setImmediate = global.setImmediate || process.nextTick;
|
|
|
|
describe('unique stream', function() {
|
|
|
|
function makeStream(type) {
|
|
var s = new Stream();
|
|
s.readable = true;
|
|
|
|
var n = 10;
|
|
var next = after(n, function () {
|
|
setImmediate(function () {
|
|
s.emit('end');
|
|
});
|
|
});
|
|
|
|
for (var i = 0; i < n; i++) {
|
|
var o = {
|
|
type: type,
|
|
name: 'name ' + i,
|
|
number: i * 10
|
|
};
|
|
|
|
(function (o) {
|
|
setImmediate(function () {
|
|
s.emit('data', o);
|
|
next();
|
|
});
|
|
})(o);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
it('should be able to uniqueify objects based on JSON data', function(done) {
|
|
var aggregator = unique();
|
|
makeStream('a')
|
|
.pipe(aggregator);
|
|
makeStream('a')
|
|
.pipe(aggregator);
|
|
|
|
var n = 0;
|
|
aggregator
|
|
.on('data', function () {
|
|
n++;
|
|
})
|
|
.on('end', function () {
|
|
expect(n).to.equal(10);
|
|
done();
|
|
});
|
|
});
|
|
|
|
it('should be able to uniqueify objects based on a property', function(done) {
|
|
var aggregator = unique('number');
|
|
makeStream('a')
|
|
.pipe(aggregator);
|
|
makeStream('b')
|
|
.pipe(aggregator);
|
|
|
|
var n = 0;
|
|
aggregator
|
|
.on('data', function () {
|
|
n++;
|
|
})
|
|
.on('end', function () {
|
|
expect(n).to.equal(10);
|
|
done();
|
|
});
|
|
});
|
|
|
|
it('should be able to uniqueify objects based on a function', function(done) {
|
|
var aggregator = unique(function (data) {
|
|
return data.name;
|
|
});
|
|
|
|
makeStream('a')
|
|
.pipe(aggregator);
|
|
makeStream('b')
|
|
.pipe(aggregator);
|
|
|
|
var n = 0;
|
|
aggregator
|
|
.on('data', function () {
|
|
n++;
|
|
})
|
|
.on('end', function () {
|
|
expect(n).to.equal(10);
|
|
done();
|
|
});
|
|
});
|
|
|
|
it('should be able to handle uniqueness when not piped', function(done) {
|
|
var stream = unique();
|
|
var count = 0;
|
|
stream.on('data', function (data) {
|
|
expect(data).to.equal('hello');
|
|
count++;
|
|
});
|
|
stream.on('end', function() {
|
|
expect(count).to.equal(1);
|
|
done();
|
|
});
|
|
stream.write('hello');
|
|
stream.write('hello');
|
|
stream.end();
|
|
});
|
|
});
|