Reduce tmux TUI noise with pane capture

tests/test_pty_manager.py

@@ -3,29 +3,17 @@
 from __future__ import annotations
 
 from collections.abc import Sequence
+from dataclasses import dataclass
 
 import pytest
 
 from lazy_enter.pty_manager import PtyManager
 
 
-class FakeSpawn:
-    def __init__(self, *_args: object, **_kwargs: object) -> None:
-        self.before = ""
-        self._alive = True
-
-    def isalive(self) -> bool:
-        return self._alive
-
-    def sendline(self, _text: str) -> None:
-        return None
-
-    def expect(self, *_args: object, **_kwargs: object) -> None:
-        return None
-
-    def close(self, force: bool = False) -> None:
-        assert force is True
-        self._alive = False
+@dataclass
+class Result:
+    returncode: int
+    stdout: str = ""
 
 
 def test_initial_state():
@@ -45,10 +33,7 @@ def test_start_raises_when_tmux_session_missing(monkeypatch: pytest.MonkeyPatch)
         assert capture_output is True
         assert text is True
 
-        class Result:
-            returncode = 1
-
-        return Result()
+        return Result(returncode=1)
 
     monkeypatch.setattr("lazy_enter.pty_manager.subprocess.run", fake_run)
 
@@ -57,9 +42,47 @@ def test_start_raises_when_tmux_session_missing(monkeypatch: pytest.MonkeyPatch)
         pty.start()
 
 
-def test_start_and_stop_attach(monkeypatch: pytest.MonkeyPatch):
+def test_start_send_read_and_stop(monkeypatch: pytest.MonkeyPatch):
+    calls: list[list[str]] = []
+
     def fake_run(
-        _cmd: Sequence[str],
+        cmd: Sequence[str],
+        check: bool,
+        capture_output: bool,
+        text: bool,
+    ):
+        calls.append(list(cmd))
+        assert check is False
+        assert capture_output is True
+        assert text is True
+
+        if cmd[:4] == ["tmux", "has-session", "-t", "claude"]:
+            return Result(returncode=0)
+        if cmd[:7] == ["tmux", "capture-pane", "-p", "-t", "claude", "-S", "-200"]:
+            # 첫 캡처는 baseline, 두 번째 캡처에서 한 줄 증가.
+            if calls.count(list(cmd)) == 1:
+                return Result(returncode=0, stdout="line1\nline2\n")
+            return Result(returncode=0, stdout="line1\nline2\nline3\n")
+        if cmd[:6] == ["tmux", "send-keys", "-t", "claude", "hello", "C-m"]:
+            return Result(returncode=0)
+        return Result(returncode=1)
+
+    monkeypatch.setattr("lazy_enter.pty_manager.subprocess.run", fake_run)
+
+    pty = PtyManager("claude")
+    pty.start()
+    assert pty.is_alive
+
+    pty.send("hello")
+    assert pty.read_output() == "line3"
+
+    pty.stop()
+    assert not pty.is_alive
+
+
+def test_read_output_returns_empty_when_unchanged(monkeypatch: pytest.MonkeyPatch):
+    def fake_run(
+        cmd: Sequence[str],
         check: bool,
         capture_output: bool,
         text: bool,
@@ -67,18 +90,14 @@ def test_start_and_stop_attach(monkeypatch: pytest.MonkeyPatch):
         assert check is False
         assert capture_output is True
         assert text is True
-
-        class Result:
-            returncode = 0
-
-        return Result()
+        if cmd[:4] == ["tmux", "has-session", "-t", "claude"]:
+            return Result(returncode=0)
+        if cmd[:7] == ["tmux", "capture-pane", "-p", "-t", "claude", "-S", "-200"]:
+            return Result(returncode=0, stdout="same\n")
+        return Result(returncode=1)
 
     monkeypatch.setattr("lazy_enter.pty_manager.subprocess.run", fake_run)
-    monkeypatch.setattr("lazy_enter.pty_manager.pexpect.spawn", FakeSpawn)
 
     pty = PtyManager("claude")
     pty.start()
-    assert pty.is_alive
-
-    pty.stop()
-    assert not pty.is_alive
+    assert pty.read_output() == ""