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decodeArrayStream.test.ts

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import assert from "assert";

import { encode, decodeArrayStream } from "../src";

describe("decodeArrayStream", () => {

const generateSampleObject = () => {

return {

id: Math.random(),

name: "test",

};

};

const createStream = async function* (object: any) {

for (const byte of encode(object)) {

yield [byte];

}

};

it("decodes numbers array (array8)", async () => {

const object = [1, 2, 3, 4, 5];

const result: Array<unknown> = [];

for await (const item of decodeArrayStream(createStream(object))) {

result.push(item);

}

assert.deepStrictEqual(object, result);

});

it("decodes numbers of array (array16)", async () => {

const createStream = async function* () {

yield [0xdc, 0, 3];

yield encode(1);

yield encode(2);

yield encode(3);

};

const result: Array<unknown> = [];

for await (const item of decodeArrayStream(createStream())) {

result.push(item);

}

assert.deepStrictEqual(result, [1, 2, 3]);

});

it("decodes numbers of array (array32)", async () => {

const createStream = async function* () {

yield [0xdd, 0, 0, 0, 3];

yield encode(1);

yield encode(2);

yield encode(3);

};

const result: Array<unknown> = [];

for await (const item of decodeArrayStream(createStream())) {

result.push(item);

}

assert.deepStrictEqual(result, [1, 2, 3]);

});

it("decodes objects array", async () => {

const objectsArrays: Array<any> = [];

for (let i = 0; i < 10; i++) {

objectsArrays.push(generateSampleObject());

}

const result: Array<unknown> = [];

for await (const item of decodeArrayStream(createStream(objectsArrays))) {

result.push(item);

}

assert.deepStrictEqual(objectsArrays, result);

});

it("fails for non array input", async () => {

const object = "demo";

await assert.rejects(async () => {

const result: Array<unknown> = [];

for await (const item of decodeArrayStream(createStream(object))) {

result.push(item);

}

}, /.*Unrecognized array type byte:.*/i);

});

});