62 lines
1.8 KiB
TypeScript
62 lines
1.8 KiB
TypeScript
import { Readable } from "stream";
|
|
import test from "ava";
|
|
import { expect } from "chai";
|
|
import mhysa from "../src";
|
|
const { merge } = mhysa();
|
|
|
|
test.cb(
|
|
"merge() merges multiple readable streams in chunk arrival order",
|
|
t => {
|
|
t.plan(6);
|
|
const source1 = new Readable({ objectMode: true, read: () => ({}) });
|
|
const source2 = new Readable({ objectMode: true, read: () => ({}) });
|
|
const expectedElements = ["a", "d", "b", "e", "c", "f"];
|
|
let i = 0;
|
|
merge(source1, source2)
|
|
.on("data", (element: string) => {
|
|
expect(element).to.equal(expectedElements[i]);
|
|
t.pass();
|
|
i++;
|
|
})
|
|
.on("error", t.end)
|
|
.on("end", t.end);
|
|
|
|
source1.push("a");
|
|
setTimeout(() => source2.push("d"), 10);
|
|
setTimeout(() => source1.push("b"), 20);
|
|
setTimeout(() => source2.push("e"), 30);
|
|
setTimeout(() => source1.push("c"), 40);
|
|
setTimeout(() => source2.push("f"), 50);
|
|
setTimeout(() => source2.push(null), 60);
|
|
setTimeout(() => source1.push(null), 70);
|
|
},
|
|
);
|
|
|
|
test.cb("merge() merges a readable stream", t => {
|
|
t.plan(3);
|
|
const source = new Readable({ objectMode: true, read: () => ({}) });
|
|
const expectedElements = ["a", "b", "c"];
|
|
let i = 0;
|
|
merge(source)
|
|
.on("data", (element: string) => {
|
|
expect(element).to.equal(expectedElements[i]);
|
|
t.pass();
|
|
i++;
|
|
})
|
|
.on("error", t.end)
|
|
.on("end", t.end);
|
|
|
|
source.push("a");
|
|
source.push("b");
|
|
source.push("c");
|
|
source.push(null);
|
|
});
|
|
|
|
test.cb("merge() merges an empty list of readable streams", t => {
|
|
t.plan(0);
|
|
merge()
|
|
.on("data", () => t.pass())
|
|
.on("error", t.end)
|
|
.on("end", t.end);
|
|
});
|