test: cover app and playback controller mixin behavior

tests/playback/test_playback_controller_seek_speed_mixin.py

@@ -0,0 +1,100 @@
+from __future__ import annotations
+
+from auditui.playback import controller_seek_speed as seek_speed_mod
+from auditui.playback.controller import PlaybackController
+
+
+def _controller() -> tuple[PlaybackController, list[str]]:
+    """Build controller and in-memory notification sink."""
+    messages: list[str] = []
+    return PlaybackController(messages.append, None), messages
+
+
+def test_seek_notifies_when_target_invalid(monkeypatch) -> None:
+    """Ensure seek reports end-of-file condition when target is invalid."""
+    controller, messages = _controller()
+    monkeypatch.setattr(controller, "_get_current_elapsed", lambda: 20.0)
+    controller.seek_offset = 100.0
+    controller.total_duration = 120.0
+    monkeypatch.setattr(
+        seek_speed_mod.seek_mod, "compute_seek_target", lambda *args: None
+    )
+    assert controller._seek(30.0, "forward") is False
+    assert messages[-1] == "Already at end of file"
+
+
+def test_seek_to_chapter_reports_bounds(monkeypatch) -> None:
+    """Ensure chapter seek reports first and last chapter boundaries."""
+    controller, messages = _controller()
+    controller.is_playing = True
+    controller.current_file_path = object()
+    controller.chapters = [{"title": "One", "start_time": 0.0, "end_time": 10.0}]
+    monkeypatch.setattr(controller, "_get_current_elapsed", lambda: 1.0)
+    monkeypatch.setattr(
+        seek_speed_mod.chapters_mod,
+        "get_current_chapter_index",
+        lambda elapsed, chapters: 0,
+    )
+    assert controller.seek_to_chapter("next") is False
+    assert messages[-1] == "Already at last chapter"
+    assert controller.seek_to_chapter("previous") is False
+    assert messages[-1] == "Already at first chapter"
+
+
+def test_save_current_position_writes_positive_values() -> None:
+    """Ensure save_current_position persists elapsed time via library client."""
+    calls: list[tuple[str, float]] = []
+    library = type(
+        "Library",
+        (),
+        {"save_last_position": lambda self, asin, pos: calls.append((asin, pos))},
+    )()
+    controller = PlaybackController(lambda _msg: None, library)
+    controller.current_asin = "ASIN"
+    controller.is_playing = True
+    controller.playback_start_time = 1.0
+    controller.seek_offset = 10.0
+    controller._get_current_elapsed = lambda: 15.0
+    controller._save_current_position()
+    assert calls == [("ASIN", 25.0)]
+
+
+def test_update_position_if_needed_honors_interval(monkeypatch) -> None:
+    """Ensure periodic save runs only when interval has elapsed."""
+    controller, _ = _controller()
+    controller.is_playing = True
+    controller.current_asin = "ASIN"
+    controller.library_client = object()
+    controller.last_save_time = 10.0
+    controller.position_save_interval = 30.0
+    saves: list[str] = []
+    monkeypatch.setattr(
+        controller, "_save_current_position", lambda: saves.append("save")
+    )
+    monkeypatch.setattr(seek_speed_mod.time, "time", lambda: 20.0)
+    controller.update_position_if_needed()
+    monkeypatch.setattr(seek_speed_mod.time, "time", lambda: 45.0)
+    controller.update_position_if_needed()
+    assert saves == ["save"]
+
+
+def test_change_speed_restarts_with_new_rate(monkeypatch) -> None:
+    """Ensure speed changes restart playback at current position."""
+    controller, _ = _controller()
+    controller.playback_speed = 1.0
+    controller.seek_offset = 5.0
+    monkeypatch.setattr(controller, "_get_current_elapsed", lambda: 10.0)
+    seen: list[tuple[float, float, str]] = []
+
+    def fake_restart(
+        position: float, speed: float | None = None, message: str | None = None
+    ) -> bool:
+        """Capture restart call parameters."""
+        seen.append((position, speed or 0.0, message or ""))
+        return True
+
+    monkeypatch.setattr(controller, "_restart_at_position", fake_restart)
+    assert controller.increase_speed() is True
+    assert seen and seen[0][0] == 15.0
+    assert seen[0][1] > 1.0
+    assert seen[0][2].startswith("Speed: ")