Release MIDI Tools 0.2.0

tests/browser/app.spec.ts

@@ -1,4 +1,5 @@
 import { expect, test } from "@playwright/test";
+import { Buffer } from "node:buffer";
 
 for (const path of ["/", "/deep/nested/midi/"]) {
   test(`inspects and edits MIDI locally at ${path}`, async ({ page }) => {
@@ -26,6 +27,40 @@ for (const path of ["/", "/deep/nested/midi/"]) {
   });
 }
 
+test("parses and exports through the MIDI worker", async ({ page }) => {
+  await page.goto("/");
+  await page.getByLabel("Open MIDI file").setInputFiles({
+    name: "worker.mid",
+    mimeType: "audio/midi",
+    buffer: midiFixture(),
+  });
+  await expect(page.getByRole("status")).toContainText("Parsed type 0 MIDI");
+  const pending = page.waitForEvent("download");
+  await page.getByRole("button", { name: "Download MIDI" }).click();
+  expect((await pending).suggestedFilename()).toBe("worker.mid");
+  await expect(page.getByRole("status")).toContainText(
+    "MIDI export generated in the worker",
+  );
+});
+
+test("edits a paired note and inspects a local SoundFont", async ({ page }) => {
+  await page.goto("/");
+  await page.getByRole("button", { name: "Select first note" }).click();
+  await page.getByLabel("Pitch (0–127)").fill("61");
+  await page.getByLabel("Velocity").fill("77");
+  await page.getByRole("button", { name: "Apply note edit" }).click();
+  await expect(page.getByRole("status")).toContainText("note updated");
+  await page.getByLabel("Open SoundFont file").setInputFiles({
+    name: "fixture.sf2",
+    mimeType: "audio/x-soundfont",
+    buffer: soundFontFixture(),
+  });
+  await expect(page.getByRole("status")).toContainText(
+    "Inspected the local SoundFont structure",
+  );
+  await expect(page.getByText("Fixture bank", { exact: true })).toBeVisible();
+});
+
 test("keeps the installed MIDI application available offline", async ({
   page,
   context,
@@ -45,3 +80,31 @@ test("keeps the installed MIDI application available offline", async ({
     await context.setOffline(false);
   }
 });
+
+function midiFixture(): Buffer {
+  return Buffer.from([
+    0x4d, 0x54, 0x68, 0x64, 0, 0, 0, 6, 0, 0, 0, 1, 1, 0xe0, 0x4d, 0x54, 0x72,
+    0x6b, 0, 0, 0, 12, 0, 0x90, 60, 100, 0x83, 0x60, 60, 0, 0, 0xff, 0x2f, 0,
+  ]);
+}
+
+function soundFontFixture(): Buffer {
+  const chunk = (id: string, data: Buffer) => {
+    const output = Buffer.alloc(8 + data.length + (data.length & 1));
+    output.write(id, 0, "ascii");
+    output.writeUInt32LE(data.length, 4);
+    data.copy(output, 8);
+    return output;
+  };
+  const list = (id: string, ...children: Buffer[]) =>
+    chunk("LIST", Buffer.concat([Buffer.from(id, "ascii"), ...children]));
+  const body = Buffer.concat([
+    Buffer.from("sfbk", "ascii"),
+    list("INFO", chunk("INAM", Buffer.from("Fixture bank\0"))),
+    list("pdta", chunk("phdr", Buffer.alloc(76))),
+  ]);
+  const output = Buffer.alloc(8);
+  output.write("RIFF", 0, "ascii");
+  output.writeUInt32LE(body.length, 4);
+  return Buffer.concat([output, body]);
+}