test: assert logging output

Author: jslee02

python/tests/unit/common/test_logging.py

@@ -2,18 +2,31 @@
 import pytest
 
 
-def test_basics():
+def test_basics(capsys):
     dart.common.trace("trace log")
     dart.common.debug("debug log")
     dart.common.info("info log")
     dart.common.warn("warn log")
     dart.common.error("error log")
     dart.common.fatal("fatal log")
 
+    captured = capsys.readouterr()
+    combined = captured.out + captured.err
 
-def test_arguments():
+    assert "trace log" in combined
+    assert "debug log" in combined
+    assert "info log" in combined
+    assert "warn log" in combined
+    assert "error log" in combined
+    assert "fatal log" in combined
+
+
+def test_arguments(capsys):
     val = 10
     dart.common.info("Log with param '{}' and '{}'".format(1, val))
+    captured = capsys.readouterr()
+    combined = captured.out + captured.err
+    assert "Log with param '1' and '10'" in combined
 
 
 if __name__ == "__main__":