org.apache.flink.test.util.JavaProgramTestBase Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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.flink.test.util;
import org.apache.flink.api.common.JobExecutionResult;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.junit.Assert;
import org.junit.Test;
/**
* Base class for unit tests that run a single test with object reuse enabled/disabled and against
* collection environments.
*
* To write a unit test against this test base, simply extend it and implement the {@link
* #testProgram()} method.
*
*
To skip the execution against collection environments you have to override {@link
* #skipCollectionExecution()}.
*/
public abstract class JavaProgramTestBase extends AbstractTestBase {
private JobExecutionResult latestExecutionResult;
/**
* The number of times a test should be repeated.
*
*
This is useful for runtime changes, which affect resource management. Running certain
* tests repeatedly might help to discover resource leaks, race conditions etc.
*/
private int numberOfTestRepetitions = 1;
private boolean isCollectionExecution;
public void setNumberOfTestRepetitions(int numberOfTestRepetitions) {
this.numberOfTestRepetitions = numberOfTestRepetitions;
}
public int getParallelism() {
return isCollectionExecution ? 1 : miniClusterResource.getNumberSlots();
}
public JobExecutionResult getLatestExecutionResult() {
return this.latestExecutionResult;
}
public boolean isCollectionExecution() {
return isCollectionExecution;
}
// --------------------------------------------------------------------------------------------
// Methods to create the test program and for pre- and post- test work
// --------------------------------------------------------------------------------------------
protected abstract void testProgram() throws Exception;
protected void preSubmit() throws Exception {}
protected void postSubmit() throws Exception {}
protected boolean skipCollectionExecution() {
return false;
}
// --------------------------------------------------------------------------------------------
// Test entry point
// --------------------------------------------------------------------------------------------
@Test
public void testJobWithObjectReuse() throws Exception {
isCollectionExecution = false;
// pre-submit
try {
preSubmit();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Pre-submit work caused an error: " + e.getMessage());
}
// This only works because the underlying ExecutionEnvironment is a TestEnvironment
// We should fix that we are able to get access to the latest execution result from a
// different
// execution environment and how the object reuse mode is enabled
TestEnvironment env = miniClusterResource.getTestEnvironment();
env.getConfig().enableObjectReuse();
// Possibly run the test multiple times
for (int i = 0; i < numberOfTestRepetitions; i++) {
// call the test program
try {
testProgram();
this.latestExecutionResult = env.getLastJobExecutionResult();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Error while calling the test program: " + e.getMessage());
}
Assert.assertNotNull(
"The test program never triggered an execution.", this.latestExecutionResult);
}
// post-submit
try {
postSubmit();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Post-submit work caused an error: " + e.getMessage());
}
}
@Test
public void testJobWithoutObjectReuse() throws Exception {
isCollectionExecution = false;
// pre-submit
try {
preSubmit();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Pre-submit work caused an error: " + e.getMessage());
}
// This only works because the underlying ExecutionEnvironment is a TestEnvironment
// We should fix that we are able to get access to the latest execution result from a
// different
// execution environment and how the object reuse mode is enabled
ExecutionEnvironment env = miniClusterResource.getTestEnvironment();
env.getConfig().disableObjectReuse();
// Possibly run the test multiple times
for (int i = 0; i < numberOfTestRepetitions; i++) {
// call the test program
try {
testProgram();
this.latestExecutionResult = env.getLastJobExecutionResult();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Error while calling the test program: " + e.getMessage());
}
Assert.assertNotNull(
"The test program never triggered an execution.", this.latestExecutionResult);
}
// post-submit
try {
postSubmit();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Post-submit work caused an error: " + e.getMessage());
}
}
@Test
public void testJobCollectionExecution() throws Exception {
// check if collection execution should be skipped.
if (this.skipCollectionExecution()) {
return;
}
isCollectionExecution = true;
// pre-submit
try {
preSubmit();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Pre-submit work caused an error: " + e.getMessage());
}
// prepare the test environment
CollectionTestEnvironment env = new CollectionTestEnvironment();
env.setAsContext();
// call the test program
try {
testProgram();
this.latestExecutionResult = env.getLastJobExecutionResult();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Error while calling the test program: " + e.getMessage());
} finally {
miniClusterResource.getTestEnvironment().setAsContext();
}
Assert.assertNotNull(
"The test program never triggered an execution.", this.latestExecutionResult);
// post-submit
try {
postSubmit();
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail("Post-submit work caused an error: " + e.getMessage());
}
}
}