test(terminal): compare restore with the actual fullscreen exit

packages/server/src/terminal/terminal.test.ts

@@ -568,6 +568,7 @@ describe("createTerminal", () => {
   });
 
   it("clears restored fullscreen content when the application leaves the alternate screen", async () => {
+    const exitOutput = "\x1b[?1049lPROMPT";
     const session = trackSession(
       await createTerminal({
         workspaceId: "ws-test",
@@ -577,23 +578,27 @@ describe("createTerminal", () => {
         command: process.execPath,
         args: [
           "-e",
-          "process.stdout.write('SHELL\\r\\n\\x1b[?1049h\\x1b[2J\\x1b[HFULLSCREEN'); setInterval(() => {}, 100000);",
+          `process.stdout.write('SHELL\\r\\n\\x1b[?1049h\\x1b[2J\\x1b[HFULLSCREEN'); process.stdin.setRawMode(true); process.stdin.on('data', () => process.stdout.write(${JSON.stringify(exitOutput)}));`,
         ],
       }),
     );
     const state = await waitForState(session, (current) => getRowText(current, 0) === "FULLSCREEN");
+    session.write("q");
+    const exited = await waitForState(session, (current) => getRowText(current, 1) === "PROMPT");
+    const expected = getLines(exited).join("\n").trim();
+    expect(expected).toBe("SHELL\nPROMPT");
     const restored = new xterm.Terminal({ cols: 80, rows: 10, allowProposedApi: true });
     try {
       await new Promise<void>((resolve) =>
         restored.write(renderTerminalSnapshotToAnsi(state), resolve),
       );
       expect(restored.buffer.active.getLine(0)?.translateToString(true)).toBe("FULLSCREEN");
-      await new Promise<void>((resolve) => restored.write("\x1b[?1049lPROMPT", resolve));
+      await new Promise<void>((resolve) => restored.write(exitOutput, resolve));
       const visible = Array.from({ length: restored.rows }, (_, row) =>
         restored.buffer.active.getLine(row)?.translateToString(true),
       ).join("\n");
       expect(visible).not.toContain("FULLSCREEN");
-      expect(visible.trim()).toBe("PROMPT");
+      expect(visible.trim()).toBe(expected);
     } finally {
       restored.dispose();
     }