strom/tests/stringify.spec.ts

import { Readable } from "stream";
import test from "ava";
import { expect } from "chai";
import mhysa from "../src";
const { stringify } = mhysa();

test.cb("stringify() stringifies the streamed elements as JSON", t => {
    t.plan(4);
    const source = new Readable({ objectMode: true });
    const expectedElements = [
        '"abc"',
        "0",
        '{"a":"a","b":"b","c":"c"}',
        '["a","b","c"]',
    ];
    let i = 0;
    source
        .pipe(stringify())
        .on("data", part => {
            expect(part).to.deep.equal(expectedElements[i]);
            t.pass();
            i++;
        })
        .on("error", t.end)
        .on("end", t.end);

    source.push("abc");
    source.push(0);
    source.push({ a: "a", b: "b", c: "c" });
    source.push(["a", "b", "c"]);
    source.push(null);
});

test.cb(
    "stringify() stringifies the streamed elements as pretty-printed JSON",
    t => {
        t.plan(4);
        const source = new Readable({ objectMode: true });
        const expectedElements = [
            '"abc"',
            "0",
            '{\n  "a": "a",\n  "b": "b",\n  "c": "c"\n}',
            '[\n  "a",\n  "b",\n  "c"\n]',
        ];
        let i = 0;
        source
            .pipe(stringify({ pretty: true }))
            .on("data", part => {
                expect(part).to.deep.equal(expectedElements[i]);
                t.pass();
                i++;
            })
            .on("error", t.end)
            .on("end", t.end);

        source.push("abc");
        source.push(0);
        source.push({ a: "a", b: "b", c: "c" });
        source.push(["a", "b", "c"]);
        source.push(null);
    },
);