MRUNIT-186 - method context.getNumReduceTasks() does not work (Lukas Nalezenec via Brock Noland)
diff --git a/src/main/java/org/apache/hadoop/mrunit/internal/mapreduce/AbstractMockContextWrapper.java b/src/main/java/org/apache/hadoop/mrunit/internal/mapreduce/AbstractMockContextWrapper.java
index f0206a9..521e732 100644
--- a/src/main/java/org/apache/hadoop/mrunit/internal/mapreduce/AbstractMockContextWrapper.java
+++ b/src/main/java/org/apache/hadoop/mrunit/internal/mapreduce/AbstractMockContextWrapper.java
@@ -131,6 +131,15 @@
return DistributedCache.getLocalCacheFiles(configuration);
}
});
+
+ when(context.getNumReduceTasks()).thenAnswer(new Answer<Integer>() {
+ @Override
+ @SuppressWarnings("deprecation")
+ public Integer answer(InvocationOnMock invocation) throws Throwable {
+ return configuration.getInt("mapred.reduce.tasks", 1);
+ }
+ });
+
} catch (IOException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
diff --git a/src/test/java/org/apache/hadoop/mrunit/internal/mapreduce/MockReduceContextWrapperTest.java b/src/test/java/org/apache/hadoop/mrunit/internal/mapreduce/MockReduceContextWrapperTest.java
new file mode 100644
index 0000000..03e1339
--- /dev/null
+++ b/src/test/java/org/apache/hadoop/mrunit/internal/mapreduce/MockReduceContextWrapperTest.java
@@ -0,0 +1,59 @@
+/**
+ * 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.hadoop.mrunit.internal.mapreduce;
+
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Reducer;
+
+import org.apache.hadoop.mrunit.mapreduce.ReduceDriver;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class MockReduceContextWrapperTest {
+
+ class TestReducer extends Reducer {
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+ assertEquals(10, context.getNumReduceTasks());
+ }
+ }
+
+
+ /**
+ * Tests that method context.getNumReduceTasks() correctly returns value from configuration
+ * */
+ @Test
+ public void testContext_getNumReduceTasks() throws Exception {
+ Reducer reducer = new TestReducer();
+ ReduceDriver driver = ReduceDriver.newReduceDriver(reducer);
+ driver.getConfiguration().setInt("mapred.reduce.tasks", 10);
+
+ List<Text> values = new ArrayList();
+ values.add(new Text("bb"));
+ driver.withInput(new Text("aa"), values);
+ assertEquals("Reducer not executed", 1, driver.run().size());
+
+ }
+}
