feat: WorldInterface + Heartbeat v2 (#871, #872) (#900)

Co-authored-by: Perplexity Computer <perplexity@tower.local>
Co-committed-by: Perplexity Computer <perplexity@tower.local>

tests/infrastructure/world/test_interface.py

@@ -0,0 +1,130 @@
+"""Tests for the WorldInterface contract and type system."""
+
+import pytest
+
+from infrastructure.world.interface import WorldInterface
+from infrastructure.world.types import (
+    ActionResult,
+    ActionStatus,
+    CommandInput,
+    PerceptionOutput,
+)
+
+
+# ---------------------------------------------------------------------------
+# Type construction
+# ---------------------------------------------------------------------------
+
+
+class TestPerceptionOutput:
+    def test_defaults(self):
+        p = PerceptionOutput()
+        assert p.location == ""
+        assert p.entities == []
+        assert p.events == []
+        assert p.raw == {}
+        assert p.timestamp is not None
+
+    def test_custom_values(self):
+        p = PerceptionOutput(
+            location="Balmora",
+            entities=["Guard", "Merchant"],
+            events=["door_opened"],
+        )
+        assert p.location == "Balmora"
+        assert len(p.entities) == 2
+        assert "door_opened" in p.events
+
+
+class TestCommandInput:
+    def test_minimal(self):
+        c = CommandInput(action="move")
+        assert c.action == "move"
+        assert c.target is None
+        assert c.parameters == {}
+
+    def test_with_target_and_params(self):
+        c = CommandInput(action="attack", target="Rat", parameters={"weapon": "sword"})
+        assert c.target == "Rat"
+        assert c.parameters["weapon"] == "sword"
+
+
+class TestActionResult:
+    def test_defaults(self):
+        r = ActionResult()
+        assert r.status == ActionStatus.SUCCESS
+        assert r.message == ""
+
+    def test_failure(self):
+        r = ActionResult(status=ActionStatus.FAILURE, message="blocked")
+        assert r.status == ActionStatus.FAILURE
+
+
+class TestActionStatus:
+    def test_values(self):
+        assert ActionStatus.SUCCESS.value == "success"
+        assert ActionStatus.FAILURE.value == "failure"
+        assert ActionStatus.PENDING.value == "pending"
+        assert ActionStatus.NOOP.value == "noop"
+
+
+# ---------------------------------------------------------------------------
+# Abstract contract
+# ---------------------------------------------------------------------------
+
+
+class TestWorldInterfaceContract:
+    """Verify the ABC cannot be instantiated directly."""
+
+    def test_cannot_instantiate(self):
+        with pytest.raises(TypeError):
+            WorldInterface()
+
+    def test_subclass_must_implement_observe(self):
+        class Incomplete(WorldInterface):
+            def act(self, command):
+                pass
+
+            def speak(self, message, target=None):
+                pass
+
+        with pytest.raises(TypeError):
+            Incomplete()
+
+    def test_subclass_must_implement_act(self):
+        class Incomplete(WorldInterface):
+            def observe(self):
+                return PerceptionOutput()
+
+            def speak(self, message, target=None):
+                pass
+
+        with pytest.raises(TypeError):
+            Incomplete()
+
+    def test_subclass_must_implement_speak(self):
+        class Incomplete(WorldInterface):
+            def observe(self):
+                return PerceptionOutput()
+
+            def act(self, command):
+                return ActionResult()
+
+        with pytest.raises(TypeError):
+            Incomplete()
+
+    def test_complete_subclass_instantiates(self):
+        class Complete(WorldInterface):
+            def observe(self):
+                return PerceptionOutput()
+
+            def act(self, command):
+                return ActionResult()
+
+            def speak(self, message, target=None):
+                pass
+
+        adapter = Complete()
+        assert adapter.is_connected is True  # default
+        assert isinstance(adapter.observe(), PerceptionOutput)
+        assert isinstance(adapter.act(CommandInput(action="test")), ActionResult)