90 lines
2.5 KiB
TypeScript
90 lines
2.5 KiB
TypeScript
import { Readable } from "stream";
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import { performance } from "perf_hooks";
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import test from "ava";
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import { expect } from "chai";
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import { rate } from "../src";
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test.cb("rate() sends data at a rate of 150", t => {
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t.plan(5);
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const targetRate = 150;
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const source = new Readable({ objectMode: true });
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const expectedElements = ["a", "b", "c", "d", "e"];
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const start = performance.now();
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let i = 0;
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source
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.pipe(rate(targetRate))
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.on("data", (element: string[]) => {
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const currentRate = (i / (performance.now() - start)) * 1000;
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expect(element).to.deep.equal(expectedElements[i]);
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expect(currentRate).lessThan(targetRate);
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t.pass();
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i++;
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})
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.on("error", t.end)
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.on("end", t.end);
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source.push("a");
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source.push("b");
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source.push("c");
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source.push("d");
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source.push("e");
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source.push(null);
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});
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test.cb("rate() sends data at a rate of 50", t => {
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t.plan(5);
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const targetRate = 50;
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const source = new Readable({ objectMode: true });
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const expectedElements = ["a", "b", "c", "d", "e"];
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const start = performance.now();
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let i = 0;
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source
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.pipe(rate(targetRate))
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.on("data", (element: string[]) => {
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const currentRate = (i / (performance.now() - start)) * 1000;
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expect(element).to.deep.equal(expectedElements[i]);
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expect(currentRate).lessThan(targetRate);
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t.pass();
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i++;
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})
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.on("error", t.end)
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.on("end", t.end);
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source.push("a");
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source.push("b");
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source.push("c");
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source.push("d");
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source.push("e");
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source.push(null);
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});
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test.cb("rate() sends data at a rate of 1", t => {
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t.plan(5);
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const targetRate = 1;
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const source = new Readable({ objectMode: true });
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const expectedElements = ["a", "b", "c", "d", "e"];
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const start = performance.now();
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let i = 0;
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source
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.pipe(rate(targetRate))
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.on("data", (element: string[]) => {
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const currentRate = (i / (performance.now() - start)) * 1000;
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expect(element).to.deep.equal(expectedElements[i]);
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expect(currentRate).lessThan(targetRate);
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t.pass();
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i++;
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})
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.on("error", t.end)
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.on("end", t.end);
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source.push("a");
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source.push("b");
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source.push("c");
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source.push("d");
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source.push("e");
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source.push(null);
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});
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