axax/esnext/__tests__/pluck.test.js

A library of async iterator extensions for JavaScript including ```map```, ```reduce```, ```filter```, ```flatMap```, ```pipe``` and [more](https://github.com/jamiemccrindle/axax/blob/master/docs/API.md#functions).

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const from_1 = require("../from");
const of_1 = require("../of");
const pluck_1 = require("../pluck");
const toArray_1 = require("../toArray");
test("pluck", async () => {
    const source = {
        a: "plucked",
        x: 1,
        y: 2,
        z: {},
    };
    const result = await toArray_1.toArray(pluck_1.pluck("a")(of_1.of(source)));
    expect(result).toEqual(["plucked"]);
});
test("pluck with multiple items", async () => {
    const source = [
        {
            a: "item1",
            x: 1,
        },
        {
            a: "item2",
            x: 1,
        }
    ];
    const result = await toArray_1.toArray(pluck_1.pluck("a")(from_1.from(source)));
    expect(result).toEqual(["item1", "item2"]);
});
test("pluck with nested properties", async () => {
    const source = {
        a: {
            b: 1
        },
        x: 2,
    };
    const result = await toArray_1.toArray(pluck_1.pluck("a", "b")(of_1.of(source)));
    expect(result).toEqual([1]);
});
test("pluck with undefined properties", async () => {
    const source = {
        a: {
            b: 2
        },
        b: 3,
        x: 4,
    };
    const result = await toArray_1.toArray(pluck_1.pluck("a", "b", "c")(of_1.of(source)));
    expect(result).toEqual([undefined]);
});
test("pluck with no parameters", async () => {
    const source = {
        a: 1,
    };
    const result = await toArray_1.toArray(pluck_1.pluck()(of_1.of(source)));
    expect(result).toEqual([source]);
});
test("pluck with non-object sources", async () => {
    const source = [
        1,
        2,
        4,
    ];
    const result = await toArray_1.toArray(pluck_1.pluck("test")(of_1.of(source)));
    expect(result).toEqual([undefined]);
});