zentol commented on a change in pull request #11639: [FLINK-16626][runtime]
Prevent REST handler from being closed more than once
URL: https://github.com/apache/flink/pull/11639#discussion_r404582030
##########
File path:
flink-clients/src/test/java/org/apache/flink/client/program/rest/RestClusterClientTest.java
##########
@@ -271,6 +273,24 @@ public void testDetachedJobSubmission() throws Exception {
}
+ /**
+ * Tests that ensure each handler is registered only once.
+ */
+ @Test
+ public void testDuplicatedHandlerRegistration() throws Exception {
+ final TestJobSubmitHandler testJobSubmitHandler = new
TestJobSubmitHandler();
+
+ assertThrows("Duplicate REST handler instance found. Please
ensure each instance is registered only once.",
Review comment:
We generally try to avoid matching the exact text; it is quite tiresome
having to adjust a test just because you changed added a bit more information.
Since `assertThrows` only checks that the string is _contained_ in the
exception we can instead use "Duplicate REST handler".
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