Support paste markers split across writes. (#11977)

packages/cli/src/ui/contexts/KeypressContext.test.tsx

@@ -46,7 +46,7 @@ class MockStdin extends EventEmitter {
   pause = vi.fn();
 
   write(text: string) {
-    this.emit('data', Buffer.from(text));
+    this.emit('data', text);
   }
 }
 
@@ -381,6 +381,61 @@ describe('KeypressContext - Kitty Protocol', () => {
         }),
       );
     });
+    it('should paste start code split over multiple writes', async () => {
+      const keyHandler = vi.fn();
+      const pastedText = 'pasted content';
+
+      const { result } = renderHook(() => useKeypressContext(), { wrapper });
+
+      act(() => result.current.subscribe(keyHandler));
+
+      act(() => {
+        // Split PASTE_START into two parts
+        stdin.write(PASTE_START.slice(0, 3));
+        stdin.write(PASTE_START.slice(3));
+        stdin.write(pastedText);
+        stdin.write(PASTE_END);
+      });
+
+      await waitFor(() => {
+        expect(keyHandler).toHaveBeenCalledTimes(1);
+      });
+
+      expect(keyHandler).toHaveBeenCalledWith(
+        expect.objectContaining({
+          paste: true,
+          sequence: pastedText,
+        }),
+      );
+    });
+
+    it('should paste end code split over multiple writes', async () => {
+      const keyHandler = vi.fn();
+      const pastedText = 'pasted content';
+
+      const { result } = renderHook(() => useKeypressContext(), { wrapper });
+
+      act(() => result.current.subscribe(keyHandler));
+
+      act(() => {
+        stdin.write(PASTE_START);
+        stdin.write(pastedText);
+        // Split PASTE_END into two parts
+        stdin.write(PASTE_END.slice(0, 3));
+        stdin.write(PASTE_END.slice(3));
+      });
+
+      await waitFor(() => {
+        expect(keyHandler).toHaveBeenCalledTimes(1);
+      });
+
+      expect(keyHandler).toHaveBeenCalledWith(
+        expect.objectContaining({
+          paste: true,
+          sequence: pastedText,
+        }),
+      );
+    });
   });
 
   describe('debug keystroke logging', () => {