94 lines
1.8 KiB
JavaScript
94 lines
1.8 KiB
JavaScript
var assert = require("chai").assert;
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var ForkStream = require("../");
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describe("fork-stream", function() {
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it("should split objects into their correct streams", function(done) {
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var fork = new ForkStream({
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classifier: function classify(e, done) {
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return done(null, e >= 5);
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},
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});
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var expectedA = [5, 7, 9],
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expectedB = [1, 4, 3, 1];
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var actualA = [],
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actualB = [];
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fork.a.on("data", function(e) {
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actualA.push(e);
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});
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fork.b.on("data", function(e) {
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actualB.push(e);
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});
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fork.on("finish", function() {
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assert.deepEqual(expectedA, actualA);
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assert.deepEqual(expectedB, actualB);
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return done();
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});
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[1, 5, 7, 4, 9, 3, 1].forEach(function(n) {
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fork.write(n);
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});
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fork.end();
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});
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it("should respect backpressure", function(done) {
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var fork = new ForkStream({
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highWaterMark: 2,
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classifier: function classify(e, done) {
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return done(null, e >= 5);
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},
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});
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var expected = [5, 7],
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actual = [];
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fork.a.on("data", function(e) {
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actual.push(e);
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});
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var timeout = setTimeout(function() {
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assert.deepEqual(expected, actual);
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return done();
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}, 10);
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fork.on("finish", function() {
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clearTimeout(timeout);
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return done(Error("should not finish"));
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});
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[1, 5, 7, 4, 9, 3, 1].forEach(function(n) {
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fork.write(n);
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});
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fork.end();
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});
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it("should end the outputs when the input finishes", function(done) {
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var fork = new ForkStream();
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var count = 0;
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var onEnd = function onEnd() {
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if (++count === 2) {
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return done();
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}
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};
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fork.a.on("end", onEnd)
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fork.b.on("end", onEnd);
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// start "flowing" mode
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fork.a.resume();
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fork.b.resume();
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fork.end();
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});
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});
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