feedBack/plugins/drum_highway_3d/tests/data_layer.test.js

// Pure data-layer tests: load screen.js in a bare vm window and exercise the
// __test exports (no DOM, no WebGL, no network). Doubles as a lint that no
// module-scope code touches document/localStorage outside a try/catch —
// the vm window deliberately provides neither.
const { test } = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');

function load() {
    const window = {
        console,
        location: { protocol: 'http:', host: 'localhost' },
        slopsmith: {},
    };
    window.window = window;
    window.globalThis = window;
    const context = vm.createContext(window);
    const src = fs.readFileSync(path.join(__dirname, '..', 'screen.js'), 'utf8');
    vm.runInContext(src, context, { filename: 'screen.js' });
    return window.slopsmithViz_drum_highway_3d;
}

test('module loads in a bare vm (no DOM / localStorage at module scope)', () => {
    const factory = load();
    assert.equal(typeof factory, 'function');
    assert.equal(factory.contextType, 'webgl2');
});

test('_variantForHit: ghost > flam > bell > accent > normal precedence', () => {
    const { _variantForHit } = load().__test;
    assert.equal(_variantForHit({ g: true, f: true, v: 120 }), 'ghost');
    assert.equal(_variantForHit({ f: true, v: 120 }), 'flam');
    assert.equal(_variantForHit({ p: 'ride_bell' }), 'bell');
    assert.equal(_variantForHit({ v: 100 }), 'accent');
    assert.equal(_variantForHit({ v: 127 }), 'accent');
    assert.equal(_variantForHit({ v: 99 }), 'normal');
    // Missing velocity defaults to 100 → accent.
    assert.equal(_variantForHit({}), 'accent');
});

test('matchesArrangement: claims drum arrangements', () => {
    const matches = load().matchesArrangement;
    assert.equal(matches({ has_drum_tab: true, arrangement: 'Drums' }), true);
    assert.equal(matches({ has_drum_tab: true, arrangement: 'Drum Kit' }), true);
    assert.equal(matches({ has_drum_tab: true, arrangement: 'Percussion' }), true);
});

test('matchesArrangement: never claims without a drum tab', () => {
    const matches = load().matchesArrangement;
    assert.equal(matches(null), false);
    assert.equal(matches({}), false);
    assert.equal(matches({ arrangement: 'Drums' }), false);
});

test('matchesArrangement: steal-guard — guitar arrangements stay with highway_3d', () => {
    const matches = load().matchesArrangement;
    // Full-band pack (drum_tab present) playing a guitar-family part:
    // first-match-wins Auto order must not hand these to the drum highway.
    for (const arr of ['Lead', 'Rhythm', 'Bass', 'Combo', 'Guitar 22', 'Alt. Lead']) {
        assert.equal(matches({ has_drum_tab: true, arrangement: arr }), false, arr);
    }
    // Keys notation present → the keys/staff viz take it.
    assert.equal(matches({ has_drum_tab: true, has_notation: true, arrangement: 'Piano' }), false);
});

test('matchesArrangement: claims packs nothing more specific can render', () => {
    const matches = load().matchesArrangement;
    // Drum tab + nondescript arrangement, no notation → drummable, claim it.
    assert.equal(matches({ has_drum_tab: true, arrangement: '' }), true);
    assert.equal(matches({ has_drum_tab: true }), true);
    // Word-boundary check: "BasslineKeys"-style names don't contain a
    // guitar-family word as a whole word.
    assert.equal(matches({ has_drum_tab: true, arrangement: 'Bassline' }), true);
});

test('readFxSettings: defaults survive a localStorage-less environment', () => {
    const { readFxSettings, FX_DEFAULTS } = load().__test;
    // The vm window has no localStorage — the try/catch must eat the
    // ReferenceError and hand back pure defaults (everything ON).
    assert.deepEqual(readFxSettings(), FX_DEFAULTS);
    assert.equal(FX_DEFAULTS.bloom, true);
});

test('MIDI map: open hi-hat is a first-class piece (46 → hh_open)', () => {
    const { MIDI_TO_PIECE, HIT_TOLERANCE_S } = load().__test;
    assert.equal(MIDI_TO_PIECE[46], 'hh_open');
    assert.equal(MIDI_TO_PIECE[42], 'hh_closed');
    assert.equal(MIDI_TO_PIECE[35], 'kick');
    assert.equal(MIDI_TO_PIECE[36], 'kick');
    // ±50 ms window matches the 2D drums plugin.
    assert.equal(HIT_TOLERANCE_S, 0.05);
});