[ Version ( since = "2.34" ) ]
public void expect_message (string? log_domain, LogLevelFlags log_level, string pattern)

Indicates that a message with the given log_domain and log_level, with text matching pattern, is expected to be logged.

When this message is logged, it will not be printed, and the test case will not abort.

This API may only be used with the old logging API ([func@GLib.log] without `G_LOG_USE_STRUCTURED` defined). It will not work with the structured logging API. See [Testing for Messages](logging.html#testing-for-messages).

Use [func@GLib.test_assert_expected_messages] to assert that all previously-expected messages have been seen and suppressed.

You can call this multiple times in a row, if multiple messages are expected as a result of a single call. (The messages must appear in the same order as the calls to [func@GLib.test_expect_message].)

For example:

```c // push_thread_default should fail if the // context is already owned by another thread. g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, "assertion*acquired_context*failed"); g_main_context_push_thread_default (bad_context); g_test_assert_expected_messages (); ```

Note that you cannot use this to test [func@GLib.error] messages, since [func@GLib.error] intentionally never returns even if the program doesn’t abort; use [func@GLib.test_trap_subprocess] in this case.

If messages at [flags@GLib.LogLevelFlags.LEVEL_DEBUG] are emitted, but not explicitly expected via [func@GLib.test_expect_message] then they will be ignored.



the log domain of the message


the log level of the message


a glob-style pattern (see [type@GLib.PatternSpec])

Namespace: GLib.Test
Package: glib-2.0