Extract shared test fixtures to conftest.py

Moved common test fixtures (mock_writer, mock_reader, test_zone, player,
nearby_player, clear_state) from individual test files into a shared
conftest.py. This eliminates duplication across test_power.py, test_sleep.py,
test_combat_zaxis.py, test_quit.py, test_stamina_cues.py, and
test_stamina_cue_wiring.py.

Some test files override specific fixtures where they need custom behavior
(e.g., test_quit.py adds a close method to mock_writer, stamina tests use
smaller zones and custom player positions).

tests/conftest.py

@@ -0,0 +1,69 @@
+"""Shared test fixtures for mudlib tests."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from mudlib.combat.engine import active_encounters
+from mudlib.player import Player, players
+from mudlib.zone import Zone
+
+
+@pytest.fixture(autouse=True)
+def clear_state():
+    """Clear global state before and after each test."""
+    players.clear()
+    active_encounters.clear()
+    yield
+    players.clear()
+    active_encounters.clear()
+
+
+@pytest.fixture
+def mock_writer():
+    """Create a mock writer for testing."""
+    writer = MagicMock()
+    writer.write = MagicMock()
+    writer.drain = AsyncMock()
+    return writer
+
+
+@pytest.fixture
+def mock_reader():
+    """Create a mock reader for testing."""
+    return MagicMock()
+
+
+@pytest.fixture
+def test_zone():
+    """Create a test zone for players."""
+    terrain = [["." for _ in range(256)] for _ in range(256)]
+    zone = Zone(
+        name="testzone",
+        width=256,
+        height=256,
+        toroidal=True,
+        terrain=terrain,
+        impassable=set(),
+    )
+    return zone
+
+
+@pytest.fixture
+def player(mock_reader, mock_writer, test_zone):
+    """Create a test player named Goku at origin."""
+    p = Player(name="Goku", x=0, y=0, reader=mock_reader, writer=mock_writer)
+    p.location = test_zone
+    test_zone._contents.append(p)
+    players[p.name] = p
+    return p
+
+
+@pytest.fixture
+def nearby_player(mock_reader, mock_writer, test_zone):
+    """Create a nearby test player named Vegeta at origin."""
+    p = Player(name="Vegeta", x=0, y=0, reader=mock_reader, writer=mock_writer)
+    p.location = test_zone
+    test_zone._contents.append(p)
+    players[p.name] = p
+    return p

tests/test_combat_zaxis.py

@@ -1,67 +1,20 @@
 """Tests for z-axis altitude checks in combat."""
 
 from pathlib import Path
-from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
 from mudlib.combat import commands as combat_commands
 from mudlib.combat.encounter import CombatState
-from mudlib.combat.engine import active_encounters, get_encounter, start_encounter
+from mudlib.combat.engine import get_encounter, start_encounter
 from mudlib.combat.moves import load_moves
-from mudlib.player import Player, players
-from mudlib.zone import Zone
-
-
-@pytest.fixture(autouse=True)
-def clear_state():
-    """Clear encounters and players before and after each test."""
-    active_encounters.clear()
-    players.clear()
-    yield
-    active_encounters.clear()
-    players.clear()
-
-
-@pytest.fixture
-def test_zone():
-    """Create a test zone for players."""
-    terrain = [["." for _ in range(256)] for _ in range(256)]
-    zone = Zone(
-        name="testzone",
-        width=256,
-        height=256,
-        toroidal=True,
-        terrain=terrain,
-        impassable=set(),
-    )
-    return zone
-
-
-@pytest.fixture
-def mock_writer():
-    writer = MagicMock()
-    writer.write = MagicMock()
-    writer.drain = AsyncMock()
-    return writer
-
-
-@pytest.fixture
-def mock_reader():
-    return MagicMock()
-
-
-@pytest.fixture
-def player(mock_reader, mock_writer, test_zone):
-    p = Player(name="Goku", x=0, y=0, reader=mock_reader, writer=mock_writer)
-    p.location = test_zone
-    test_zone._contents.append(p)
-    players[p.name] = p
-    return p
 
 
 @pytest.fixture
 def target(mock_reader, mock_writer, test_zone):
+    """Alias for nearby_player fixture with name 'target' for this module."""
+    from mudlib.player import Player, players
+
     t = Player(name="Vegeta", x=0, y=0, reader=mock_reader, writer=mock_writer)
     t.location = test_zone
     test_zone._contents.append(t)

tests/test_power.py

@@ -2,71 +2,12 @@
 
 import asyncio
 import time
-from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
 from mudlib.combat.encounter import CombatEncounter
 from mudlib.combat.engine import active_encounters
 from mudlib.commands.power import cmd_power
-from mudlib.player import Player, players
-from mudlib.zone import Zone
-
-
-@pytest.fixture(autouse=True)
-def clear_state():
-    """Clear players and encounters before and after each test."""
-    players.clear()
-    active_encounters.clear()
-    yield
-    players.clear()
-    active_encounters.clear()
-
-
-@pytest.fixture
-def test_zone():
-    """Create a test zone for players."""
-    terrain = [["." for _ in range(256)] for _ in range(256)]
-    zone = Zone(
-        name="testzone",
-        width=256,
-        height=256,
-        toroidal=True,
-        terrain=terrain,
-        impassable=set(),
-    )
-    return zone
-
-
-@pytest.fixture
-def mock_writer():
-    writer = MagicMock()
-    writer.write = MagicMock()
-    writer.drain = AsyncMock()
-    return writer
-
-
-@pytest.fixture
-def mock_reader():
-    return MagicMock()
-
-
-@pytest.fixture
-def player(mock_reader, mock_writer, test_zone):
-    p = Player(name="Goku", x=0, y=0, reader=mock_reader, writer=mock_writer)
-    p.location = test_zone
-    test_zone._contents.append(p)
-    players[p.name] = p
-    return p
-
-
-@pytest.fixture
-def nearby_player(mock_reader, mock_writer, test_zone):
-    p = Player(name="Vegeta", x=0, y=0, reader=mock_reader, writer=mock_writer)
-    p.location = test_zone
-    test_zone._contents.append(p)
-    players[p.name] = p
-    return p
 
 
 @pytest.mark.asyncio

tests/test_quit.py

@@ -1,39 +1,18 @@
 """Tests for quit command."""
 
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
 from mudlib.commands.quit import cmd_quit
-from mudlib.player import Player, players
-from mudlib.zone import Zone
-
-
-@pytest.fixture(autouse=True)
-def clear_state():
-    """Clear players before and after each test."""
-    players.clear()
-    yield
-    players.clear()
-
-
-@pytest.fixture
-def test_zone():
-    """Create a test zone for players."""
-    terrain = [["." for _ in range(256)] for _ in range(256)]
-    zone = Zone(
-        name="testzone",
-        width=256,
-        height=256,
-        toroidal=True,
-        terrain=terrain,
-        impassable=set(),
-    )
-    return zone
+from mudlib.player import players
 
 
 @pytest.fixture
 def mock_writer():
+    """Override conftest mock_writer to add close method for quit tests."""
+    from unittest.mock import AsyncMock
+
     writer = MagicMock()
     writer.write = MagicMock()
     writer.drain = AsyncMock()
@@ -41,20 +20,6 @@ def mock_writer():
     return writer
 
 
-@pytest.fixture
-def mock_reader():
-    return MagicMock()
-
-
-@pytest.fixture
-def player(mock_reader, mock_writer, test_zone):
-    p = Player(name="Goku", x=0, y=0, reader=mock_reader, writer=mock_writer)
-    p.location = test_zone
-    test_zone._contents.append(p)
-    players[p.name] = p
-    return p
-
-
 @pytest.mark.asyncio
 async def test_quit_blocked_during_combat(player):
     """Test quit is blocked when player is in combat mode."""

tests/test_sleep.py

@@ -1,67 +1,9 @@
 """Tests for sleep command."""
 
-from unittest.mock import AsyncMock, MagicMock
-
 import pytest
 
 from mudlib.commands.sleep import cmd_sleep
-from mudlib.player import Player, players
 from mudlib.resting import STAMINA_PER_TICK, process_resting
-from mudlib.zone import Zone
-
-
-@pytest.fixture(autouse=True)
-def clear_state():
-    """Clear players before and after each test."""
-    players.clear()
-    yield
-    players.clear()
-
-
-@pytest.fixture
-def test_zone():
-    """Create a test zone for players."""
-    terrain = [["." for _ in range(256)] for _ in range(256)]
-    zone = Zone(
-        name="testzone",
-        width=256,
-        height=256,
-        toroidal=True,
-        terrain=terrain,
-        impassable=set(),
-    )
-    return zone
-
-
-@pytest.fixture
-def mock_writer():
-    writer = MagicMock()
-    writer.write = MagicMock()
-    writer.drain = AsyncMock()
-    return writer
-
-
-@pytest.fixture
-def mock_reader():
-    return MagicMock()
-
-
-@pytest.fixture
-def player(mock_reader, mock_writer, test_zone):
-    p = Player(name="Goku", x=0, y=0, reader=mock_reader, writer=mock_writer)
-    p.location = test_zone
-    test_zone._contents.append(p)
-    players[p.name] = p
-    return p
-
-
-@pytest.fixture
-def nearby_player(mock_reader, mock_writer, test_zone):
-    p = Player(name="Vegeta", x=0, y=0, reader=mock_reader, writer=mock_writer)
-    p.location = test_zone
-    test_zone._contents.append(p)
-    players[p.name] = p
-    return p
 
 
 @pytest.mark.asyncio

tests/test_stamina_cue_wiring.py

@@ -10,21 +10,15 @@ from mudlib.player import Player
 from mudlib.zone import Zone
 
 
-@pytest.fixture
-def mock_writer():
-    writer = MagicMock()
-    writer.write = MagicMock()
-    writer.drain = AsyncMock()
-    return writer
-
-
 @pytest.fixture
 def test_zone():
+    """Override conftest test_zone with smaller zone for stamina tests."""
     return Zone(name="test", width=10, height=10)
 
 
 @pytest.fixture
 def player(mock_writer, test_zone):
+    """Override conftest player with custom position and stats for stamina tests."""
     p = Player(
         name="Goku",
         x=5,
@@ -40,6 +34,7 @@ def player(mock_writer, test_zone):
 
 @pytest.fixture
 def defender(test_zone):
+    """Defender fixture with custom position for stamina tests."""
     w = MagicMock()
     w.write = MagicMock()
     w.drain = AsyncMock()

tests/test_stamina_cues.py

@@ -8,21 +8,15 @@ from mudlib.player import Player
 from mudlib.zone import Zone
 
 
-@pytest.fixture
-def mock_writer():
-    writer = MagicMock()
-    writer.write = MagicMock()
-    writer.drain = AsyncMock()
-    return writer
-
-
 @pytest.fixture
 def test_zone():
+    """Override conftest test_zone with smaller zone for stamina tests."""
     return Zone(name="test", width=10, height=10)
 
 
 @pytest.fixture
 def player(mock_writer, test_zone):
+    """Override conftest player with custom position and stats for stamina tests."""
     p = Player(
         name="Goku",
         x=5,
@@ -38,7 +32,7 @@ def player(mock_writer, test_zone):
 
 @pytest.fixture
 def nearby_player(test_zone):
-    """A nearby player to receive broadcasts."""
+    """Override conftest nearby_player with custom position for stamina tests."""
     w = MagicMock()
     w.write = MagicMock()
     w.drain = AsyncMock()