feat: add comprehensive end-to-end test suite

e2e/test_tui_record_and_loop.ts

@@ -0,0 +1,86 @@
+import { setupTest, startEngine, startClientInTmux, openCmdFifo, writeFifoCommand, wait, tmuxSendKeys, tmuxCapturePane, ensureGenTone, execSync, waitForStatusContaining, teardownTest } from './test_utils';
+import * as path from "path";
+import * as fs from "fs";
+import * as globals from "./test_globals";
+
+export async function testTUIRecordAndLoop(): Promise<void> {
+  console.log("\nTest: TUI RECORD AND LOOP (T key)");
+  setupTest();
+  const engine = await startEngine();
+  await startClientInTmux();
+  openCmdFifo();
+  ensureGenTone();
+  await wait(500);
+
+  // press 't' to start recording on default cell (col 0, row 0)
+  tmuxSendKeys("looper", "0", "t");
+  await wait(1000);
+
+  // 1) Check status FIFO shows RECORD
+  const statusRec = await waitForStatusContaining("RECORD", 5000);
+  if (!statusRec.includes("RECORD")) {
+    console.log("  FAIL: Status FIFO did not show RECORD after pressing t");
+    engine.kill(); teardownTest();
+    throw new Error("RECORD state not achieved via TUI");
+  }
+  console.log("  PASS: Status FIFO shows RECORD");
+
+  // 2) Check tmux pane for 'R' indicator (first character of cell in grid)
+  const paneAfterT = tmuxCapturePane("looper", "0");
+  const paneContainsR = paneAfterT.includes("R");
+  if (!paneContainsR) {
+    console.log("  FAIL: TUI grid does not show 'R' indicator after pressing t");
+    console.log("  Pane excerpt (maybe): " + paneAfterT.slice(0, 1000));
+    engine.kill(); teardownTest();
+    throw new Error("Grid indicator not updated");
+  }
+  console.log("  PASS: TUI grid shows 'R' indicator");
+
+  // Play tone into looper:ch0in (3 seconds)
+  execSync(`${globals.GEN_TONE_BIN} 3.0 "looper:ch0in"`, { timeout: 8000 });
+
+  // press 't' again to stop recording -> loop
+  tmuxSendKeys("looper", "0", "t");
+  const statusLoop = await waitForStatusContaining("LOOPING", 8000);
+  if (!statusLoop.includes("LOOPING")) {
+    console.log("  WARN: Did not see LOOPING in status, continuing");
+  } else {
+    console.log("  PASS: Status FIFO shows LOOPING after second t");
+  }
+
+  // Check pane for 'L' indicator
+  const paneAfterLoop = tmuxCapturePane("looper", "0");
+  const paneContainsL = paneAfterLoop.includes("L");
+  if (!paneContainsL) {
+    console.log("  FAIL: TUI grid does not show 'L' indicator after loop");
+    engine.kill(); teardownTest();
+    throw new Error("Grid indicator not updated for LOOPING");
+  }
+  console.log("  PASS: TUI grid shows 'L' indicator");
+
+  // Wait a couple of repetitions (3 seconds) then save via FIFO to verify audio
+  await wait(3000);
+
+  // Save via FIFO
+  writeFifoCommand("save");
+  await wait(3000);
+
+  // Check save.wav exists and has audio
+  const savePath = path.join(globals.PROJECT_DIR, "save.wav");
+  let saveOk = false;
+  if (fs.existsSync(savePath)) {
+    const stat = fs.statSync(savePath);
+    if (stat.size > 44) {
+      saveOk = true;
+      console.log(`  PASS: save.wav created (${stat.size} bytes) – loop has audio`);
+    }
+  }
+  if (!saveOk) {
+    console.log("  FAIL: save.wav not created or too small – loop not producing audio");
+    engine.kill(); teardownTest();
+    throw new Error("Loop playback not producing audio");
+  }
+
+  engine.kill();
+  teardownTest();
+}