Add tests

tests/protocols/test_protocols.py

@@ -0,0 +1,50 @@
+import tempfile
+
+import mypy.api
+import pytest
+from ophyd import sim
+
+from ophyd_async import protocols as bs_protocols
+
+
+def test_readable():
+    assert isinstance(sim.motor1, bs_protocols.AsyncReadable)
+    assert isinstance(sim.det1, bs_protocols.AsyncReadable)
+    assert not isinstance(sim.flyer1, bs_protocols.AsyncReadable)
+
+
+def test_pausable():
+    assert isinstance(sim.det1, bs_protocols.AsyncPausable)
+
+
+# I think the commented out tests pass because __getattr__ is implemented, but not sure
+@pytest.mark.skip(reason="ophyd missing py.typed to communicate type hints to mypy")
+@pytest.mark.parametrize(
+    "type_, hardware, pass_",
+    [
+        ("Readable", "ABDetector(name='hi')", True),
+        ("Readable", "SynAxis(name='motor1')", True),
+        ("Readable", "TrivialFlyer()", False),
+        ("Configurable", "ABDetector(name='hi')", True),
+        ("Pausable", "ABDetector(name='hi')", True),
+    ],
+)
+def test_mypy(type_, hardware, pass_):
+    template = f"""
+from ophyd_async import protocols as bs_protocols
+from ophyd import sim
+
+var: bs_protocols.{type_} = sim.{hardware}
+"""
+
+    with tempfile.NamedTemporaryFile("wt") as f:
+        f.write(template)
+        f.seek(0)
+        stdout, stderr, exit = mypy.api.run([f.name])
+        # pass true means exit 0, pass false means nonzero exit
+        try:
+            assert exit != pass_
+        except AssertionError:
+            print(stdout)
+            print(stderr)
+            raise