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tests_original_develop/unit/test_logging.py

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+"""
+Testes unitários para o módulo de logging.
+"""
+
+import logging
+import json
+from io import StringIO
+import pytest
+
+import src.core.logging as _logging_module
+from src.core.logging import (
+    setup_logging,
+    get_logger,
+    set_request_id,
+    set_session_id,
+    set_user_id,
+    clear_context,
+    MetricsLogger,
+    ContextFilter,
+    _StructuredFormatter,
+)
+
+
+@pytest.fixture
+def reset_logging():
+    """Reset logging configuration and singleton state after each test."""
+    yield
+    root = logging.getLogger()
+    for handler in root.handlers[:]:
+        root.removeHandler(handler)
+    _logging_module._configured = False
+    clear_context()
+
+
+@pytest.fixture
+def capture_logs():
+    """Capture log output to a string buffer"""
+    log_capture = StringIO()
+    handler = logging.StreamHandler(log_capture)
+    handler.setLevel(logging.DEBUG)
+    
+    # Use simple formatter for easier testing
+    formatter = logging.Formatter('%(levelname)s - %(name)s - %(message)s')
+    handler.setFormatter(formatter)
+    
+    logger = logging.getLogger()
+    logger.addHandler(handler)
+    logger.setLevel(logging.DEBUG)
+    
+    yield log_capture
+    
+    logger.removeHandler(handler)
+
+
+def test_setup_logging_creates_logger(reset_logging):
+    """Test that setup_logging creates and configures a logger"""
+    logger = setup_logging()
+    
+    assert logger is not None
+    assert isinstance(logger, logging.Logger)
+    assert len(logger.handlers) > 0
+
+
+def test_get_logger_returns_logger():
+    """Test that get_logger returns a logger with the specified name"""
+    logger = get_logger("test_module")
+    
+    assert logger is not None
+    assert logger.name == "test_module"
+
+
+def test_context_filter_adds_request_id():
+    """Test that ContextFilter adds request_id to log records"""
+    set_request_id("test-request-123")
+    
+    record = logging.LogRecord(
+        name="test",
+        level=logging.INFO,
+        pathname="",
+        lineno=0,
+        msg="test message",
+        args=(),
+        exc_info=None
+    )
+    
+    filter = ContextFilter()
+    filter.filter(record)
+    
+    assert hasattr(record, 'request_id')
+    assert record.request_id == "test-request-123"
+    
+    clear_context()
+
+
+def test_context_filter_adds_session_id():
+    """Test that ContextFilter adds session_id to log records"""
+    set_session_id("session-456")
+    
+    record = logging.LogRecord(
+        name="test",
+        level=logging.INFO,
+        pathname="",
+        lineno=0,
+        msg="test message",
+        args=(),
+        exc_info=None
+    )
+    
+    filter = ContextFilter()
+    filter.filter(record)
+    
+    assert hasattr(record, 'session_id')
+    assert record.session_id == "session-456"
+    
+    clear_context()
+
+
+def test_context_filter_adds_user_id():
+    """Test that ContextFilter adds user_id to log records"""
+    set_user_id("user-789")
+    
+    record = logging.LogRecord(
+        name="test",
+        level=logging.INFO,
+        pathname="",
+        lineno=0,
+        msg="test message",
+        args=(),
+        exc_info=None
+    )
+    
+    filter = ContextFilter()
+    filter.filter(record)
+    
+    assert hasattr(record, 'user_id')
+    assert record.user_id == "user-789"
+    
+    clear_context()
+
+
+def test_set_and_clear_context():
+    """Test setting and clearing context variables"""
+    set_request_id("req-1")
+    set_session_id("sess-1")
+    set_user_id("user-1")
+    
+    # Create a record and apply filter
+    record = logging.LogRecord(
+        name="test",
+        level=logging.INFO,
+        pathname="",
+        lineno=0,
+        msg="test",
+        args=(),
+        exc_info=None
+    )
+    
+    filter = ContextFilter()
+    filter.filter(record)
+    
+    assert record.request_id == "req-1"
+    assert record.session_id == "sess-1"
+    assert record.user_id == "user-1"
+    
+    # Clear context
+    clear_context()
+    
+    # Create new record
+    record2 = logging.LogRecord(
+        name="test",
+        level=logging.INFO,
+        pathname="",
+        lineno=0,
+        msg="test",
+        args=(),
+        exc_info=None
+    )
+    
+    filter.filter(record2)
+    
+    assert record2.request_id is None
+    assert record2.session_id is None
+    assert record2.user_id is None
+
+
+def test_metrics_logger_measures_time():
+    """Test that MetricsLogger correctly measures elapsed time"""
+    import time
+    
+    metrics = MetricsLogger("test_operation")
+    metrics.start()
+    
+    time.sleep(0.1)  # Sleep for 100ms
+    
+    elapsed = metrics.stop()
+    
+    assert elapsed >= 0.1
+    assert elapsed < 0.2  # Should be close to 0.1
+
+
+def test_metrics_logger_logs_basic_metrics(capture_logs):
+    """Test that MetricsLogger logs basic metrics"""
+    logger = get_logger("test")
+    metrics = MetricsLogger("test_op", logger=logger)
+    
+    metrics.start()
+    metrics.stop()
+    metrics.log()
+    
+    log_output = capture_logs.getvalue()
+    assert "test_op" in log_output or "Metrics" in log_output
+
+
+def test_metrics_logger_logs_tokens_and_cost(capture_logs):
+    """Test that MetricsLogger logs tokens and cost"""
+    logger = get_logger("test")
+    metrics = MetricsLogger("llm_call", logger=logger)
+    
+    metrics.start()
+    metrics.stop()
+    metrics.log(tokens=150, cost=0.003)
+    
+    log_output = capture_logs.getvalue()
+    assert "llm_call" in log_output or "Metrics" in log_output
+
+
+def test_metrics_logger_logs_extra_metrics(capture_logs):
+    """Test that MetricsLogger logs extra metrics"""
+    logger = get_logger("test")
+    metrics = MetricsLogger("custom_op", logger=logger)
+    
+    metrics.start()
+    metrics.stop()
+    metrics.log(custom_metric=42, another_metric="value")
+    
+    log_output = capture_logs.getvalue()
+    assert "custom_op" in log_output or "Metrics" in log_output
+
+
+def test_metrics_logger_auto_stops_on_log():
+    """Test that MetricsLogger automatically stops when logging"""
+    import time
+    
+    metrics = MetricsLogger("test_op")
+    metrics.start()
+    
+    # Sleep a tiny bit to ensure some time passes
+    time.sleep(0.001)
+    
+    # Don't call stop() explicitly
+    assert metrics.end_time is None
+    
+    metrics.log()
+    
+    # Should have stopped automatically
+    assert metrics.end_time is not None
+    assert metrics.elapsed_time >= 0  # Changed from > 0 to >= 0
+
+
+def test_logging_different_levels(capture_logs):
+    """Test logging at different levels"""
+    logger = get_logger("test")
+    
+    logger.debug("Debug message")
+    logger.info("Info message")
+    logger.warning("Warning message")
+    logger.error("Error message")
+    
+    log_output = capture_logs.getvalue()
+    
+    # Depending on log level, some messages might not appear
+    # But at least one should be there
+    assert len(log_output) > 0
+
+
+def test_context_persists_across_multiple_logs(capture_logs):
+    """Test that context persists across multiple log calls"""
+    set_request_id("persistent-req")
+    set_session_id("persistent-sess")
+    
+    logger = get_logger("test")
+    logger.info("First log")
+    logger.info("Second log")
+    logger.info("Third log")
+    
+    # Context should persist for all logs
+    # This is verified by the ContextFilter being applied to all records
+    
+    clear_context()
+
+
+@pytest.mark.parametrize("level", [
+    logging.DEBUG,
+    logging.INFO,
+    logging.WARNING,
+    logging.ERROR,
+])
+def test_metrics_logger_respects_log_level(level):
+    """Test that MetricsLogger respects different log levels"""
+    logger = get_logger("test")
+    metrics = MetricsLogger("test_op", logger=logger)
+    
+    metrics.start()
+    metrics.stop()
+    
+    # Should not raise an error
+    metrics.log(level=level)
+
+
+def test_metrics_logger_elapsed_time_before_stop():
+    """Test that elapsed_time works even before stop() is called"""
+    import time
+    
+    metrics = MetricsLogger("test_op")
+    metrics.start()
+    
+    time.sleep(0.05)
+    
+    # Should return current elapsed time even without stop()
+    elapsed = metrics.elapsed_time
+    assert elapsed >= 0.05
+    assert elapsed < 0.1
+
+
+def test_metrics_logger_without_start():
+    """Test that MetricsLogger handles case where start() wasn't called"""
+    metrics = MetricsLogger("test_op")
+
+    # Don't call start()
+    elapsed = metrics.elapsed_time
+
+    assert elapsed == 0.0
+
+
+# ---------------------------------------------------------------------------
+# Correlation fields — session_id, user_id, request_id must always be present
+# ---------------------------------------------------------------------------
+
+def _make_record(msg: str = "test") -> logging.LogRecord:
+    record = logging.LogRecord(
+        name="test", level=logging.INFO, pathname="",
+        lineno=0, msg=msg, args=(), exc_info=None,
+    )
+    ContextFilter().filter(record)
+    return record
+
+
+def test_json_always_has_correlation_fields_when_context_empty():
+    """JSON output must contain request_id/session_id/user_id even when None."""
+    clear_context()
+    formatter = _StructuredFormatter(use_json=True)
+    output = formatter.format(_make_record())
+    obj = json.loads(output)
+
+    assert "request_id" in obj
+    assert "session_id" in obj
+    assert "user_id" in obj
+    assert obj["request_id"] is None
+    assert obj["session_id"] is None
+    assert obj["user_id"] is None
+
+
+def test_json_correlation_fields_carry_set_values():
+    """JSON output must carry the values set via set_* helpers."""
+    set_request_id("req-abc")
+    set_session_id("sess-xyz")
+    set_user_id("user-123")
+
+    formatter = _StructuredFormatter(use_json=True)
+    output = formatter.format(_make_record())
+    obj = json.loads(output)
+
+    assert obj["request_id"] == "req-abc"
+    assert obj["session_id"] == "sess-xyz"
+    assert obj["user_id"] == "user-123"
+
+    clear_context()
+
+
+def test_text_always_has_correlation_fields_when_context_empty():
+    """Text output must contain the three correlation keys even when None."""
+    clear_context()
+    formatter = _StructuredFormatter(use_json=False)
+    output = formatter.format(_make_record())
+
+    assert "request_id=None" in output
+    assert "session_id=None" in output
+    assert "user_id=None" in output
+
+
+def test_text_correlation_fields_carry_set_values():
+    """Text output must carry the values set via set_* helpers."""
+    set_request_id("req-t1")
+    set_session_id("sess-t1")
+    set_user_id("user-t1")
+
+    formatter = _StructuredFormatter(use_json=False)
+    output = formatter.format(_make_record())
+
+    assert "request_id=req-t1" in output
+    assert "session_id=sess-t1" in output
+    assert "user_id=user-t1" in output
+
+    clear_context()
+
+
+def test_json_correlation_fields_reset_after_clear_context():
+    """After clear_context, correlation fields revert to None in JSON."""
+    set_request_id("req-temp")
+    set_session_id("sess-temp")
+    set_user_id("user-temp")
+    clear_context()
+
+    formatter = _StructuredFormatter(use_json=True)
+    output = formatter.format(_make_record())
+    obj = json.loads(output)
+
+    assert obj["request_id"] is None
+    assert obj["session_id"] is None
+    assert obj["user_id"] is None