my.bluemaestro: run against testdata, add on CI

tests/bluemaestro.py

@@ -1,6 +1,25 @@
 #!/usr/bin/env python3
-from my.bluemaestro import measurements, _get_exports
+from pathlib import Path
+
+from my.core.cachew import disable_cachew
+disable_cachew()  # meh
 
 
-def test():
-    print(list(measurements(_get_exports()[-1:])))
+def test() -> None:
+    from my.bluemaestro import measurements
+    res = list(measurements())
+    assert len(res) > 1000
+
+
+import pytest # type: ignore
+@pytest.fixture(autouse=True)
+def prepare():
+    testdata = Path(__file__).absolute().parent.parent / 'testdata'
+    bmdata = testdata / 'hpi-testdata' / 'bluemaestro'
+    assert bmdata.exists(), bmdata
+
+    from my.cfg import config
+    class user_config:
+        export_path = bmdata
+    config.bluemaestro = user_config # type: ignore
+    yield