XComp commented on a change in pull request #16286:
URL: https://github.com/apache/flink/pull/16286#discussion_r661412119



##########
File path: 
flink-clients/src/test/java/org/apache/flink/client/deployment/application/JarManifestParserTest.java
##########
@@ -157,6 +158,24 @@ public void 
testFindOnlyEntryClassMultipleJarsWithSingleManifestEntry() throws I
                 is(equalTo(TestJob.class.getCanonicalName())));
     }
 
+    @Test
+    public void testFindFirstManifestAttributeWithNoAttribute() throws 
IOException {
+        assertThat(
+                
JarManifestParser.findFirstManifestAttribute(TestJob.getTestJobJar()).isPresent(),
+                is(false));
+    }
+
+    @Test
+    public void testFindFirstManifestAttributeWithAttributes() throws 
IOException {
+        Optional<String> optionalValue =
+                JarManifestParser.findFirstManifestAttribute(
+                        TestJob.getTestJobJar(),
+                        "some-attr",

Review comment:
       I added the tests because I made the 
`JarManifestParser.findFirstManifestAttribute` publicly accessible. Hence, I 
thought of adding test cases for it might be good as well.




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