Merge pull request #342 from chrysn-pull-requests/python-test-logging

python/tests: Add basic test for logging

lakers-python/test/test_lakers.py

@@ -1,8 +1,15 @@
+import io
+import logging
 import lakers
 import cbor2
 import pytest
 from lakers import CredentialTransfer, EdhocInitiator, EdhocResponder
 
+# This needs to be early, thus top-level: Once Lakers objects are created, the
+# log level is fixed.
+LOGSTREAM = io.StringIO()
+logging.basicConfig(stream=LOGSTREAM, level=0, force=True)
+
 # values from RFC9529, but CRED_I shortened so that passing by value is possible in a 256 byte message
 CRED_I = bytes.fromhex("A202617808A101A5010202412B2001215820AC75E9ECE3E50BFC8ED60399889522405C47BF16DF96660A41298CB4307F7EB62258206E5DE611388A4B8A8211334AC7D37ECB52A387D257E6DB3C2A93DF21FF3AFFC8")
 I = bytes.fromhex("fb13adeb6518cee5f88417660841142e830a81fe334380a953406a1305e8706b")
@@ -98,6 +105,15 @@ def test_buffer_error():
         _ = initiator.parse_message_2(cbor2.dumps(bytes([1] * 10000)))
     assert str(err.value) == "MessageBufferError::SliceTooLong"
 
+def test_logging():
+    LOGSTREAM.truncate(0)
+    LOGSTREAM.seek(0)
+
+    test_handshake_credential_transfer_by(CredentialTransfer.ByValue, CredentialTransfer.ByValue)
+
+    # So far we don't test much, but that is currently in it an shows that log messages get through.
+    assert 'Initializing EdhocInitiator' in LOGSTREAM.getvalue()
+
 @pytest.mark.parametrize("cred_r_transfer", [CredentialTransfer.ByReference, CredentialTransfer.ByValue])
 @pytest.mark.parametrize("cred_i_transfer", [CredentialTransfer.ByReference, CredentialTransfer.ByValue])
 def test_handshake_credential_transfer_by(cred_r_transfer, cred_i_transfer):