rpuch commented on code in PR #2429:
URL: https://github.com/apache/ignite-3/pull/2429#discussion_r1299870608
##########
modules/core/src/testFixtures/java/org/apache/ignite/internal/testframework/log4j2/TestLogChecker.java:
##########
@@ -35,7 +35,51 @@
import org.apache.logging.log4j.core.config.Property;
/**
- * Test log checker.
+ * This class is used to check log events/messages.
+ * <p>
+ * When it is needed to check log events/messages, the following steps should
be performed:
+ * </p>
+ * <pre><code>
+ * // Create a new instance of TestLogChecker for the given logger name
and specified predicate.
+ * TestLogChecker checker = new TestLogChecker(
+ * CustomClass.class.getName(),
+ * evt -> evt.getMessage().getFormattedMessage().matches(pattern)
&& evt.getLevel() == Level.ERROR);
+ *
+ * checker.start();
+ * try {
+ * // do something
+ * } finally {
+ * checker.stop();
+ * }
+ *
+ * assertThat(checker.isMatched(), is(true));
+ * </code></pre>
+ * <p>
+ * When it is needed to check log events/messages and perform some action,
just add a predicate and an action:
+ * </p>
+ * <pre><code>
+ * AtomicInteger messageCounter = new AtomicInteger();
+ * TestLogChecker checker = new TestLogChecker(
+ * CustomClass.class.getName(),
+ * evt -> evt.getMessage().getFormattedMessage().matches(pattern)
&& evt.getLevel() == Level.ERROR,
+ * // This action will be executed when the predicate is matched.
+ * () -> {
+ * messageCounter.incrementAndGet();
+ * });
+ *
+ * checker.start();
+ * try {
+ * // do something
+ * } finally {
+ * checker.stop();
+ * }
+ *
+ * assertThat(messageCounter.get(), is(42));
+ * </code></pre>
+ * <p>
+ * It is possible to add a new pair of of predicate and action using {@link
#addHandler(Predicate, Runnable)},
Review Comment:
```suggestion
* It is possible to add a new pair of predicate and action using {@link
#addHandler(Predicate, Runnable)},
```
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