scratch-vm/test/unit/blocks_music.js

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const test = require('tap').test;
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const Music = require('../../src/extensions/scratch3_music/index.js');
let playedDrum;
let playedInstrument;
const runtime = {
audioEngine: {
numDrums: 3,
numInstruments: 3,
instrumentPlayer: {
loadInstrument: instrument => (playedInstrument = instrument)
}
}
};
const blocks = new Music(runtime);
const util = {
target: {
audioPlayer: {
playDrumForBeats: drum => (playedDrum = drum)
}
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},
stackFrame: Object.create(null)
};
test('playDrum uses 1-indexing and wrap clamps', t => {
let args = {DRUM: 1};
blocks.playDrumForBeats(args, util);
t.strictEqual(playedDrum, 0);
args = {DRUM: runtime.audioEngine.numDrums + 1};
blocks.playDrumForBeats(args, util);
t.strictEqual(playedDrum, 0);
t.end();
});
test('setInstrument uses 1-indexing and wrap clamps', t => {
// Stub getMusicState
blocks._getMusicState = () => ({});
let args = {INSTRUMENT: 1};
blocks.setInstrument(args, util);
t.strictEqual(playedInstrument, 0);
args = {INSTRUMENT: runtime.audioEngine.numInstruments + 1};
blocks.setInstrument(args, util);
t.strictEqual(playedInstrument, 0);
t.end();
});