rc-js-util/src/array/typed-array/mat3/mat3-factory.spec.ts

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

import { Mat3Factory } from "./mat3-factory.js";
import { NormalizedDataViewProvider } from "../normalized-data-view/normalized-data-view-provider.js";
import { Mat3 } from "./mat3.js";
import { Test_setDefaultFlags } from "../../../test-util/test_set-default-flags.js";

describe("=> Mat3Factory", () =>
{
    beforeEach(() =>
    {
        Test_setDefaultFlags();
    });

    const factory = new Mat3Factory(Mat3.f32, NormalizedDataViewProvider.getView(Float32Array));

    describe("=> create one", () =>
    {
        it("| produces the expected array", () =>
        {
            const a = factory.createOne(1, 2, 3, 4, 5, 6, 7, 8, 9);
            expect(a.length).toBe(9);
            // noinspection SuspiciousTypeOfGuard
            expect(a instanceof Float32Array).toBe(true);
            expect(a[0]).toBe(1);
            expect(a[1]).toBe(2);
            expect(a[2]).toBe(3);
            expect(a[3]).toBe(4);
            expect(a[4]).toBe(5);
            expect(a[5]).toBe(6);
            expect(a[6]).toBe(7);
            expect(a[7]).toBe(8);
            expect(a[8]).toBe(9);
        });
    });

    describe("=> copyFromBuffer", () =>
    {
        it("| produces the expected array", () =>
        {
            const memory = new Float32Array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]);
            const a = factory.copyFromBuffer(new DataView(memory.buffer), Float32Array.BYTES_PER_ELEMENT);
            expect(a.length).toBe(9);
            expect(a[0]).toBe(2);
            expect(a[8]).toBe(10);
        });
    });

    describe("=> copyToBuffer", () =>
    {
        it("| updates the buffer at the specified location", () =>
        {
            const a = factory.createOne(1, 2, 3, 4, 5, 6, 7, 8, 9);
            const memory = new Float32Array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]);
            factory.copyToBuffer(new DataView(memory.buffer), a, Float32Array.BYTES_PER_ELEMENT);
            expect(memory[0]).toBe(1);
            expect(memory[1]).toBe(1);
            expect(memory[9]).toBe(9);
            expect(memory[10]).toBe(11);
        });
    });
});