withDefault.ts

/* eslint-disable @typescript-eslint/ban-ts-comment */
import { withDefaults } from "../lab/withDefaults.ts";
import { same } from "https://deno.land/x/evt@v2.3.0/tools/inDepth/same.ts";
import { assert } from "../assert.ts";

{
    const f = (params: { foo: string; bar: number }): string => {
        const { foo, bar } = params;
        return `${foo} ${bar}`;
    };

    const got = withDefaults(f, { "foo": "xxx" })({ "bar": 44 });

    const expected = `xxx 44`;

    assert(got === expected);

    console.log("PASS TEST 1");
}

{
    const f = (params: { a: number; b: number }) => {
        return params;
    };

    const got = withDefaults(f, { "a": 44 })({ "defaultsOverwrite": { "a": [33] }, "b": 22 });

    const expected = {
        "a": 33,
        "b": 22,
    };

    assert(same(got, expected));

    console.log("PASS TEST 2");
}

{
    const f = (params: { a?: number; b?: number }) => {
        return params;
    };

    const got = withDefaults(f, { "a": 44 })({});
    const expected = {
        "a": 44,
        "b": undefined,
    };

    assert(same(got, expected));

    console.log("PASS TEST 3");
}

{
    const f = (params: { a: number; b: number }) => {
        const { a, b } = params;
        return `${a}${b}`;
    };

    const fWd = withDefaults(f, { "a": 44 });

    const got = fWd({ "b": 33 }) + fWd({ "b": 12 });

    const expected = "44334412";

    assert(got === expected);

    console.log("PASS TEST 4");
}

{
    const f = (params: { a: number; b: number }) => {
        const { a, b } = params;
        return `${a}${b}`;
    };

    const fWd = withDefaults(f, { "a": 44 });
    const got = fWd({ "defaultsOverwrite": { "a": undefined }, "b": 33 });
    const expected = "4433";

    assert(got === expected);

    console.log("PASS TEST 5");
}

{
    const f = (params: { a: number | undefined; b: number }) => {
        return params;
    };

    const fWd = withDefaults(f, { "a": 33 });

    const got = fWd({ "b": 44, "defaultsOverwrite": { "a": [undefined] } });
    const expected = {
        "a": undefined,
        "b": 44,
    };

    assert(same(got, expected));

    console.log("PASS TEST 6");
}

{
    const f = (params: { a?: number; b: number }) => {
        return params;
    };

    const fWd = withDefaults(f, { "a": 33 });

    const got = fWd({ "b": 44, "defaultsOverwrite": { "a": [undefined] } });
    const expected = {
        "a": undefined,
        "b": 44,
    };

    assert(same(got, expected));

    console.log("PASS TEST 7");
}