test(terminal-bash): cover the spawn signal forwarded into the pwsh bootstrap send

packages/terminal/terminal-bash/tests/index.spec.ts

@@ -432,6 +432,39 @@ describe('BashTerminalBackend startup rollback', () => {
     const timedOut = new BashTerminalBackend(ctx, { ...config(), shellDialect: 'pwsh' }, async () => terminalHandle(), () => sessionFor('timeout'))
     await expect(timedOut.spawn(spec(agent(ctx)))).rejects.toThrow('did not reach readiness before startup timeout')
   })
+
+  it('forwards the spawn signal into the pwsh bootstrap sends', async () => {
+    const ctx = new Context()
+    await ctx.plugin(EmptySandbox)
+    await ctx.plugin(SandboxPolicyService, { mode: 'danger-full-access', workspaceRoot: '/workspace' })
+    const sends: TerminalSendRequest[] = []
+    const session = {
+      motd: '',
+      startSend: (request: TerminalSendRequest) => {
+        sends.push(request)
+        return {
+          done: Promise.resolve({
+            viewport: 'dsh> ', waitReason: 'stdin_read' as const,
+            sessionStatus: { kind: 'running' as const }, truncated: false,
+          }),
+          readOutput: () => ({ delta: '', truncated: false }),
+          cancel: () => false,
+        }
+      },
+      read: () => ({ text: '', totalLines: 0, lineBegin: 0, lineEnd: 0, truncated: false }),
+    } as unknown as LocalPtySession
+    const backend = new BashTerminalBackend(
+      ctx,
+      { ...config(), shellDialect: 'pwsh', shellPath: 'pwsh' },
+      async () => terminalHandle(),
+      () => session,
+    )
+    const signal = new AbortController().signal
+    const spawned = await backend.spawn({ ...spec(agent(ctx)), signal })
+    expect(spawned.motd).toBe('dsh> ')
+    expect(sends).toHaveLength(1)
+    expect(sends[0]?.signal).toBe(signal)
+  })
 })
 
 describe('terminal-bash plugin shape', () => {