test: add tests for RDAgentLog debug() and LiteLLMAPIBackend

test/log/test_logger.py

@@ -0,0 +1,72 @@
+"""Tests for rdagent/log/logger.py — RDAgentLog wrapper around loguru."""
+
+from __future__ import annotations
+
+import pytest
+from rdagent.log.logger import RDAgentLog
+
+
+class TestRDAgentLog:
+    def test_singleton(self):
+        a = RDAgentLog()
+        b = RDAgentLog()
+        assert a is b
+
+    def test_has_debug_method(self):
+        logger = RDAgentLog()
+        assert hasattr(logger, "debug")
+        assert callable(logger.debug)
+
+    def test_debug_accepts_args(self):
+        logger = RDAgentLog()
+        logger.debug("test message")
+        logger.debug("test message", tag="mytag")
+        logger.debug("test message", raw=True)
+        logger.debug("test message", tag="x", raw=False)
+
+    def test_info_warning_error_exist(self):
+        logger = RDAgentLog()
+        for method in ("info", "warning", "error", "debug"):
+            assert hasattr(logger, method), f"missing {method}"
+            assert callable(getattr(logger, method)), f"{method} not callable"
+
+    def test_log_object(self):
+        logger = RDAgentLog()
+        logger.log_object({"key": "value"})
+        logger.log_object(["a", "b"], tag="test")
+
+    def test_tag_context_manager(self):
+        logger = RDAgentLog()
+        with logger.tag("test_tag"):
+            logger.info("inside tag")
+        logger.info("outside tag")
+
+    def test_debug_does_not_raise_on_empty(self):
+        logger = RDAgentLog()
+        logger.debug("")
+        logger.debug("")
+        logger.debug("")
+
+    def test_debug_tag_propagation(self):
+        logger = RDAgentLog()
+        with logger.tag("debug_context"):
+            logger.debug("debug with tag", tag="inner")
+        logger.debug("debug outside")
+
+
+class TestRDAgentLogMethods:
+    """Verify all log-level methods exist and are callable."""
+
+    def test_all_methods_present(self):
+        logger = RDAgentLog()
+        expected = {"debug", "info", "warning", "error", "log_object"}
+        for name in expected:
+            assert hasattr(logger, name), f"RDAgentLog missing method: {name}"
+
+    def test_methods_are_bound(self):
+        logger = RDAgentLog()
+        for name in ("debug", "info", "warning", "error"):
+            method = getattr(logger, name)
+            assert callable(method)
+            # Should accept at minimum a string message
+            method("bound method test")