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new aa48791 KAFKA-7161: check invariant: oldValue is in the state (#5366)
aa48791 is described below
commit aa4879129770798f0e2cee385ab848b64dbe9498
Author: John Roesler <[email protected]>
AuthorDate: Wed Aug 1 13:02:27 2018 -0500
KAFKA-7161: check invariant: oldValue is in the state (#5366)
Reviewers: Vasily Sulatskov <[email protected]>, Guozhang Wang
<[email protected]>
---
.../kstream/internals/KTableReduceTest.java | 81 ++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git
a/streams/src/test/java/org/apache/kafka/streams/kstream/internals/KTableReduceTest.java
b/streams/src/test/java/org/apache/kafka/streams/kstream/internals/KTableReduceTest.java
new file mode 100644
index 0000000..05b74dc
--- /dev/null
+++
b/streams/src/test/java/org/apache/kafka/streams/kstream/internals/KTableReduceTest.java
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.kafka.streams.kstream.internals;
+
+import org.apache.kafka.streams.processor.Processor;
+import org.apache.kafka.streams.processor.internals.AbstractProcessorContext;
+import org.apache.kafka.streams.processor.internals.ProcessorNode;
+import org.apache.kafka.streams.state.internals.InMemoryKeyValueStore;
+import org.apache.kafka.test.InternalMockProcessorContext;
+import org.junit.Test;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static java.util.Collections.emptySet;
+import static java.util.Collections.singleton;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+public class KTableReduceTest {
+
+ @Test
+ public void shouldAddAndSubtract() {
+ final AbstractProcessorContext context = new
InternalMockProcessorContext();
+
+ final Processor<String, Change<Set<String>>> reduceProcessor =
+ new KTableReduce<String, Set<String>>(
+ "myStore",
+ this::unionNotNullArgs,
+ this::differenceNotNullArgs
+ ).get();
+
+
+ final InMemoryKeyValueStore<String, Set<String>> myStore =
+ new InMemoryKeyValueStore<>("myStore", null, null);
+
+ context.register(myStore, null);
+ reduceProcessor.init(context);
+ context.setCurrentNode(new ProcessorNode<>("reduce", reduceProcessor,
singleton("myStore")));
+
+ reduceProcessor.process("A", new Change<>(singleton("a"), null));
+ assertEquals(singleton("a"), myStore.get("A"));
+ reduceProcessor.process("A", new Change<>(singleton("b"),
singleton("a")));
+ assertEquals(singleton("b"), myStore.get("A"));
+ reduceProcessor.process("A", new Change<>(null, singleton("b")));
+ assertEquals(emptySet(), myStore.get("A"));
+ }
+
+ private Set<String> differenceNotNullArgs(final Set<String> left, final
Set<String> right) {
+ assertNotNull(left);
+ assertNotNull(right);
+
+ final HashSet<String> strings = new HashSet<>(left);
+ strings.removeAll(right);
+ return strings;
+ }
+
+ private Set<String> unionNotNullArgs(final Set<String> left, final
Set<String> right) {
+ assertNotNull(left);
+ assertNotNull(right);
+
+ final HashSet<String> strings = new HashSet<>();
+ strings.addAll(left);
+ strings.addAll(right);
+ return strings;
+ }
+}
