Asserting log messages in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to capture log messages using pytest.

PyTest

def test_log_capture(caplog):
    with caplog.[1](level="INFO"):
        logger = logging.getLogger()
        logger.info("Hello")

Drag options to blanks, or click blank then click option'

Acapture

Bset_level

Clog

Dat_level

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method that does not exist on caplog.

Trying to capture logs without setting the level.

The caplog.at_level() method sets the logging level to capture messages at or above that level.

2fill in blank

medium

Complete the code to assert that a log message contains the expected text.

PyTest

def test_log_message(caplog):
    with caplog.at_level("WARNING"):
        logger = logging.getLogger()
        logger.warning("Disk space low")
    assert "[1]" in caplog.text

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Adebug

BDisk space low

Cinfo

Derror

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for a log level name instead of the message.

Using a wrong string that does not appear in logs.

The caplog.text contains all captured log messages as a single string. We check if the expected message is present.

3fill in blank

hard

Fix the error in the assertion to check the first captured log record's message.

PyTest

def test_first_log_message(caplog):
    with caplog.at_level("ERROR"):
        logger = logging.getLogger()
        logger.error("Failure occurred")
    assert caplog.records[0].[1] == "Failure occurred"

Drag options to blanks, or click blank then click option'

Amsg

Bmessage

Ctext

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'message' instead of 'msg' attribute.

Trying to access a non-existent attribute.

The LogRecord object has a msg attribute that stores the log message.

4fill in blank

hard

Fill both blanks to assert that the log level of the first record is ERROR and the message contains 'critical'.

PyTest

def test_log_level_and_message(caplog):
    with caplog.at_level("ERROR"):
        logger = logging.getLogger()
        logger.error("A critical failure happened")
    assert caplog.records[0].[1] == logging.[2]
    assert "critical" in caplog.records[0].msg

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Alevelno

Blevelname

CERROR

DCRITICAL

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'levelname' which is a string, not numeric.

Using 'CRITICAL' constant instead of 'ERROR'.

The levelno attribute holds the numeric log level. logging.ERROR is the constant for the ERROR level.

5fill in blank

hard

Fill all three blanks to capture logs at INFO level, log an info message, and assert the message is captured.

PyTest

def test_info_log_capture(caplog):
    with caplog.[1]("INFO"):
        logger = logging.getLogger()
        logger.[2]("Process started")
    assert "[3]" in caplog.text

Drag options to blanks, or click blank then click option'

Aat_level

Binfo

CProcess started

Dwarning

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong log level or method names.

Checking for a message not logged.

Use caplog.at_level to set capture level, logger.info to log an info message, and check the message text in caplog.text.