🎉 Initial commit

tests/test_poller_fake.py

@@ -0,0 +1,33 @@
+"""End-to-end pipeline tests against opc.fake (IMPLEMENTATION_PLAN §9).
+
+The fake client lets the event pipeline run without COM/hardware; Phase 1
+grows this into the full scenario suite.
+"""
+
+import pytest
+
+from opcda_diagnozer.opc.base import OpcError
+from opcda_diagnozer.opc.fake import FakeOpcClient
+
+
+def test_fake_reads_good_quality() -> None:
+    client = FakeOpcClient()
+    client.connect()
+    results = client.read(["Channel1.Device1.Counter", "Channel1.Device1.Level"])
+    assert [r.tag for r in results] == ["Channel1.Device1.Counter", "Channel1.Device1.Level"]
+    assert all(r.quality_raw == 0xC0 for r in results)
+    assert all(r.device_time is not None for r in results)
+
+
+def test_fake_requires_connect_first() -> None:
+    client = FakeOpcClient()
+    with pytest.raises(OpcError):
+        client.read(["Channel1.Device1.Counter"])
+
+
+def test_fake_close_disconnects() -> None:
+    client = FakeOpcClient()
+    client.connect()
+    client.close()
+    with pytest.raises(OpcError):
+        client.read(["Channel1.Device1.Counter"])