checkpoint: 0.3.0 ui header, history persistence and history filter

tests/test_ui.py

@@ -5,11 +5,13 @@ import pytest
 
 from app.navigator import Navigator, VisibleEntry
 from app.ui import (
+    ESCAPE_KEY,
     HistoryLine,
     RenderLine,
     TerminalUI,
     build_history_lines,
     build_render_lines,
+    build_status_line,
     clamp_scroll_offset,
     format_entry,
     move_selection,
@@ -147,6 +149,62 @@ def test_history_mode_enter_selects_entry_and_exits(tmp_path: Path) -> None:
     assert navigator.selected_index == 0
 
 
+def test_history_mode_slash_activates_history_filter() -> None:
+    ui = TerminalUI()
+    navigator = Navigator(Path.cwd())
+    ui._history_mode = True
+
+    ui._handle_history_key(ord("/"), navigator)
+
+    assert ui._history_filter_mode is True
+    assert ui._history_filter_query == ""
+
+
+def test_history_filter_enter_selects_filtered_entry_and_exits_history(
+    tmp_path: Path,
+) -> None:
+    root = tmp_path / "root"
+    alpha = root / "alpha"
+    beta = root / "beta"
+    root.mkdir()
+    alpha.mkdir()
+    beta.mkdir()
+
+    navigator = Navigator(root)
+    navigator.set_selected_index(1)
+    navigator.enter_selected_directory()
+    navigator.go_to_parent_directory()
+    navigator.set_selected_index(2)
+    navigator.enter_selected_directory()
+
+    ui = TerminalUI()
+    ui._toggle_history_mode(navigator)
+    ui._history_filter_mode = True
+    ui._history_filter_query = "alpha"
+
+    ui._handle_history_key(10, navigator)
+
+    assert navigator.current_path == alpha.resolve()
+    assert ui._history_mode is False
+    assert ui._history_filter_mode is False
+
+
+def test_history_filter_escape_disables_only_history_filter(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+    ui = TerminalUI()
+    ui._toggle_history_mode(navigator)
+    ui._history_filter_mode = True
+    ui._history_filter_query = "ro"
+
+    ui._handle_history_key(ESCAPE_KEY, navigator)
+
+    assert ui._history_mode is True
+    assert ui._history_filter_mode is False
+    assert ui._history_filter_query == ""
+
+
 def test_history_mode_toggle_off_keeps_current_directory(tmp_path: Path) -> None:
     root = tmp_path / "root"
     root.mkdir()
@@ -264,6 +322,30 @@ def test_filter_matching_is_case_insensitive(tmp_path: Path) -> None:
     assert matches == [1]
 
 
+def test_build_status_line_shows_filter_off_when_filter_mode_is_disabled(
+    tmp_path: Path,
+) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+
+    status_line = build_status_line(navigator, filter_mode=False, filter_query="")
+
+    assert "filter: off" in status_line
+
+
+def test_build_status_line_shows_empty_filter_without_off_when_filter_is_active(
+    tmp_path: Path,
+) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+
+    status_line = build_status_line(navigator, filter_mode=True, filter_query="")
+
+    assert "filter: |" in status_line
+
+
 def test_filter_mode_uses_g_and_g_upper_as_query_characters(tmp_path: Path) -> None:
     root = tmp_path / "root"
     root.mkdir()