garydgregory commented on a change in pull request #430:
URL: https://github.com/apache/logging-log4j2/pull/430#discussion_r499833503
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File path: log4j-to-slf4j/src/test/java/org/apache/logging/slf4j/LoggerTest.java
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@@ -165,5 +166,12 @@ public void mdc() {
assertThat(list.strList, hasSize(2));
assertTrue("Incorrect year", list.strList.get(0).startsWith("2010"));
}
+
+ @Test
+ public void mdcNullBacked() {
+ assertNull("Setup wrong", MDC.getCopyOfContextMap());
+ assertTrue(ThreadContext.isEmpty());
+ assertFalse(ThreadContext.containsKey("something"));
+ }
Review comment:
An edge case worth testing IMO is getting a null key.
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