Show ground items in look command

After the viewport, look lists Things at the player's position
in a "On the ground: item1, item2" line. No output when empty.

src/mudlib/commands/look.py

@@ -5,6 +5,7 @@ from mudlib.effects import get_effects_at
 from mudlib.entity import Entity
 from mudlib.player import Player
 from mudlib.render.ansi import RESET, colorize_terrain
+from mudlib.thing import Thing
 from mudlib.zone import Zone
 
 # Viewport dimensions
@@ -99,6 +100,15 @@ async def cmd_look(player: Player, args: str) -> None:
 
     # Send to player
     player.writer.write("\r\n".join(output_lines) + "\r\n")
+
+    # Show items on the ground at player's position
+    ground_items = [
+        obj for obj in zone.contents_at(player.x, player.y) if isinstance(obj, Thing)
+    ]
+    if ground_items:
+        names = ", ".join(item.name for item in ground_items)
+        player.writer.write(f"On the ground: {names}\r\n")
+
     await player.writer.drain()
 
 

tests/test_commands.py

@@ -368,3 +368,67 @@ async def test_dispatch_allows_matching_mode(player):
     await commands.dispatch(player, "strike")
 
     assert called
+
+
+@pytest.mark.asyncio
+async def test_look_shows_ground_items(player, test_zone):
+    """look shows things on the ground at the player's position."""
+    from mudlib.player import players
+    from mudlib.thing import Thing
+
+    players.clear()
+    players[player.name] = player
+
+    Thing(name="rock", location=test_zone, x=5, y=5)
+    await look.cmd_look(player, "")
+
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "rock" in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_look_shows_multiple_ground_items(player, test_zone):
+    """look shows all things at the player's position."""
+    from mudlib.player import players
+    from mudlib.thing import Thing
+
+    players.clear()
+    players[player.name] = player
+
+    Thing(name="rock", location=test_zone, x=5, y=5)
+    Thing(name="sword", location=test_zone, x=5, y=5)
+    await look.cmd_look(player, "")
+
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "rock" in output.lower()
+    assert "sword" in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_look_no_ground_items_no_extra_output(player, test_zone):
+    """look with no ground items doesn't mention items."""
+    from mudlib.player import players
+
+    players.clear()
+    players[player.name] = player
+
+    await look.cmd_look(player, "")
+
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "on the ground" not in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_look_ignores_items_at_other_positions(player, test_zone):
+    """look doesn't show items that are at different positions."""
+    from mudlib.player import players
+    from mudlib.thing import Thing
+
+    players.clear()
+    players[player.name] = player
+
+    Thing(name="far_rock", location=test_zone, x=9, y=9)
+    await look.cmd_look(player, "")
+
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "far_rock" not in output.lower()