szetszwo commented on code in PR #981:
URL: https://github.com/apache/ratis/pull/981#discussion_r1419691617
##########
ratis-test/src/test/java/org/apache/ratis/util/TestPreconditions.java:
##########
@@ -50,4 +52,22 @@ public void testAssertUnique() {
Preconditions.assertUnique(three, Arrays.asList(4, 5, 6));
}
+
+ @Test(timeout = 1000)
+ public void testAssertNull() {
+ final Map<String, String> map = new HashMap<>();
+ final String key = "abc1234";
+ // putNew will call Preconditions.assertNull(..) to assert the entry does
not exist in the map
+ // putNew the first time should work
+ CollectionUtils.putNew(key, key, map, () -> "m");
+ Preconditions.assertTrue(map.containsKey(key));
+
+ // putNew the second time should fail
+ final Throwable e = testFailureCase("put " + key + " again",
+ () -> CollectionUtils.putNew(key, key, map, () -> "m"),
+ IllegalStateException.class);
+ LOG.info("Expected to get:", e);
Review Comment:
Let's remove it then.
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