232 lines
7.4 KiB
Python
232 lines
7.4 KiB
Python
"""Tests for the async event bus (infrastructure.events.bus)."""
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import asyncio
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import pytest
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from infrastructure.events.bus import EventBus, Event, emit, on, event_bus
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class TestEvent:
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"""Test Event dataclass."""
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def test_event_defaults(self):
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e = Event(type="test.event", source="unit_test")
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assert e.type == "test.event"
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assert e.source == "unit_test"
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assert e.data == {}
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assert e.timestamp # auto-generated
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assert e.id.startswith("evt_")
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def test_event_custom_data(self):
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e = Event(type="a.b", source="s", data={"key": "val"}, id="custom-id")
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assert e.data == {"key": "val"}
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assert e.id == "custom-id"
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class TestEventBus:
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"""Test EventBus subscribe/publish/history."""
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def _fresh_bus(self) -> EventBus:
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return EventBus()
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# ── subscribe + publish ──────────────────────────────────────────────
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async def test_exact_match_subscribe(self):
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bus = self._fresh_bus()
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received = []
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@bus.subscribe("task.created")
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async def handler(event: Event):
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received.append(event)
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count = await bus.publish(Event(type="task.created", source="test"))
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assert count == 1
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assert len(received) == 1
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assert received[0].type == "task.created"
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async def test_wildcard_subscribe(self):
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bus = self._fresh_bus()
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received = []
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@bus.subscribe("agent.*")
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async def handler(event: Event):
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received.append(event)
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await bus.publish(Event(type="agent.joined", source="test"))
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await bus.publish(Event(type="agent.left", source="test"))
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await bus.publish(Event(type="task.created", source="test")) # should NOT match
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assert len(received) == 2
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async def test_star_subscribes_to_all(self):
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bus = self._fresh_bus()
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received = []
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@bus.subscribe("*")
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async def handler(event: Event):
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received.append(event)
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await bus.publish(Event(type="anything.here", source="test"))
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await bus.publish(Event(type="x", source="test"))
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assert len(received) == 2
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async def test_no_subscribers_returns_zero(self):
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bus = self._fresh_bus()
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count = await bus.publish(Event(type="orphan.event", source="test"))
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assert count == 0
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async def test_multiple_handlers_same_pattern(self):
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bus = self._fresh_bus()
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calls = {"a": 0, "b": 0}
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@bus.subscribe("foo.bar")
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async def handler_a(event):
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calls["a"] += 1
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@bus.subscribe("foo.bar")
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async def handler_b(event):
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calls["b"] += 1
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await bus.publish(Event(type="foo.bar", source="test"))
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assert calls["a"] == 1
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assert calls["b"] == 1
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# ── unsubscribe ──────────────────────────────────────────────────────
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async def test_unsubscribe(self):
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bus = self._fresh_bus()
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received = []
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@bus.subscribe("x.y")
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async def handler(event):
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received.append(event)
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ok = bus.unsubscribe("x.y", handler)
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assert ok is True
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await bus.publish(Event(type="x.y", source="test"))
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assert len(received) == 0
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async def test_unsubscribe_nonexistent_pattern(self):
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bus = self._fresh_bus()
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async def dummy(event):
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pass
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assert bus.unsubscribe("nope", dummy) is False
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async def test_unsubscribe_wrong_handler(self):
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bus = self._fresh_bus()
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@bus.subscribe("a.b")
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async def handler_a(event):
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pass
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async def handler_b(event):
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pass
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assert bus.unsubscribe("a.b", handler_b) is False
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# ── error handling ───────────────────────────────────────────────────
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async def test_handler_error_does_not_break_other_handlers(self):
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bus = self._fresh_bus()
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received = []
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@bus.subscribe("err.test")
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async def bad_handler(event):
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raise ValueError("boom")
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@bus.subscribe("err.test")
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async def good_handler(event):
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received.append(event)
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count = await bus.publish(Event(type="err.test", source="test"))
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assert count == 2 # both were invoked
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assert len(received) == 1 # good_handler still ran
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# ── history ──────────────────────────────────────────────────────────
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async def test_history_stores_events(self):
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bus = self._fresh_bus()
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await bus.publish(Event(type="h.a", source="s"))
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await bus.publish(Event(type="h.b", source="s"))
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history = bus.get_history()
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assert len(history) == 2
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async def test_history_filter_by_type(self):
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bus = self._fresh_bus()
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await bus.publish(Event(type="h.a", source="s"))
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await bus.publish(Event(type="h.b", source="s"))
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assert len(bus.get_history(event_type="h.a")) == 1
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async def test_history_filter_by_source(self):
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bus = self._fresh_bus()
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await bus.publish(Event(type="h.a", source="x"))
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await bus.publish(Event(type="h.b", source="y"))
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assert len(bus.get_history(source="x")) == 1
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async def test_history_limit(self):
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bus = self._fresh_bus()
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for i in range(5):
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await bus.publish(Event(type="h.x", source="s"))
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assert len(bus.get_history(limit=3)) == 3
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async def test_history_max_cap(self):
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bus = self._fresh_bus()
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bus._max_history = 10
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for i in range(15):
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await bus.publish(Event(type="cap", source="s"))
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assert len(bus._history) == 10
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async def test_clear_history(self):
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bus = self._fresh_bus()
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await bus.publish(Event(type="x", source="s"))
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bus.clear_history()
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assert len(bus.get_history()) == 0
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# ── pattern matching ─────────────────────────────────────────────────
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def test_match_exact(self):
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bus = self._fresh_bus()
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assert bus._match_pattern("a.b.c", "a.b.c") is True
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assert bus._match_pattern("a.b.c", "a.b.d") is False
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def test_match_wildcard(self):
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bus = self._fresh_bus()
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assert bus._match_pattern("agent.joined", "agent.*") is True
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assert bus._match_pattern("agent.left", "agent.*") is True
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assert bus._match_pattern("task.created", "agent.*") is False
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def test_match_star(self):
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bus = self._fresh_bus()
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assert bus._match_pattern("anything", "*") is True
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class TestConvenienceFunctions:
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"""Test module-level emit() and on() helpers."""
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async def test_emit(self):
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# Clear singleton history first
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event_bus.clear_history()
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event_bus._subscribers.clear()
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received = []
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@on("conv.test")
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async def handler(event):
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received.append(event)
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count = await emit("conv.test", "unit", {"foo": "bar"})
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assert count == 1
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assert received[0].data == {"foo": "bar"}
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# Cleanup
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event_bus._subscribers.clear()
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event_bus.clear_history()
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