Midi cc node test

Author: nick-thompson

js/packages/offline-renderer/__tests__/block-events.test.js

@@ -46,6 +46,49 @@ test("midi events", async function () {
   expect(round(take(outs[1], 8))).toMatchObject([1, 1, 1, 1, 0, 0, 0, 0]);
 });
 
+test("midi cc events", async function () {
+  let core = new OfflineRenderer();
+
+  await core.initialize({
+    numInputChannels: 0,
+    numOutputChannels: 1,
+    sampleRate: 44100,
+    blockSize: 128,
+  });
+
+  // Graph with raw CC output (0-127)
+  core.render(el.midicc({ control: 1, channel: 2 }));
+
+  // Data
+  let inps = [];
+  let outs = [new Float32Array(128)];
+
+  // Get past the fade-in
+  for (let i = 0; i < 20; ++i) {
+    core.process(inps, outs);
+  }
+
+  // Now we push a CC event (CC 1, value 127) and study the outputs
+  core.pushMidiEvent(0, new Uint8Array([0xb2, 1, 127]));
+  core.process(inps, outs);
+
+  // Should see raw value of 127
+  expect(round(take(outs[0], 8))).toMatchObject(repeat(8, 127));
+
+  // On the next block we should see that the value is still held
+  core.process(inps, outs);
+  expect(round(take(outs[0], 8))).toMatchObject(repeat(8, 127));
+
+  // Now we'll push a new CC value (64) 4 samples into the next block
+  core.pushMidiEvent(4, new Uint8Array([0xb2, 1, 64]));
+  core.process(inps, outs);
+
+  // Should see transition from 127 to 64 at sample 4
+  expect(round(take(outs[0], 8))).toMatchObject([
+    127, 127, 127, 127, 64, 64, 64, 64,
+  ]);
+});
+
 test("param value events", async function () {
   let core = new OfflineRenderer();