[GitHub] [kafka] cadonna commented on a change in pull request #10052: KAFKA-12289: Adding test cases for prefix scan in InMemoryKeyValueStore

[GitBox <gi...@apache.org>]

cadonna commented on a change in pull request #10052:
URL: https://github.com/apache/kafka/pull/10052#discussion_r570207387



##########
File path: streams/src/test/java/org/apache/kafka/streams/state/internals/InMemoryKeyValueStoreTest.java
##########
@@ -60,4 +67,22 @@ public void shouldRemoveKeysWithNullValues() {
 
         assertThat(store.get(0), nullValue());
     }
+
+
+    @Test
+    public void shouldReturnKeysWithGivenPrefix(){
+        store = createKeyValueStore(driver.context());
+        final String value = "value";
+        final List<KeyValue<Integer, String>> entries = new ArrayList<>();
+        entries.add(new KeyValue<>(1, value));
+        entries.add(new KeyValue<>(2, value));
+        entries.add(new KeyValue<>(11, value));
+        entries.add(new KeyValue<>(13, value));
+
+        store.putAll(entries);
+        final KeyValueIterator<Integer, String> keysWithPrefix = store.prefixScan(1, new IntegerSerializer());

Review comment:
       Thank you for pointing this out! 
   I will have a look at this in the next days.




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