Programming and So

Performing a jUnit4 tests sequence in order to get integration testing results can be achieved by implementing a simple abstract class.

import java.util.Arrays;
import java.util.LinkedHashMap;

import org.junit.runner.JUnitCore;
import org.junit.runner.Request;
import org.junit.runner.Result;

public abstract class AbstractTestSuite {

  /**
   * Tests to be launched
   * Object - JUnit test object
   * String[] - Object method to be tested
   */
  protected LinkedHashMap<object , String[]> tests = new LinkedHashMap</object><object , String[]>();

  /**
   * Tests to be launched
   * <code>
   *  tests.put(new JUnitTest1(), new String[]{"testInvoke", "testInvokeValidateResult"});
   *  tests.put(new JUnitTest2(), new String[]{"testInvoke"});
   *  ...
   * </code>
   */
  protected abstract void init(); 

  /**
   * Tests execution.
   * Declaration order of Junit test objects and methods is followed.
   */
  public void runTests() {
    init();
    for (Object testObject: tests.keySet()) {
      for (String test: tests.get(testObject)) {
        Request request = Request.method(testObject.getClass(), test);
        Result result = new JUnitCore().run(request);
        if (result.getFailureCount() > 0) {
              System.err.println(Arrays.asList(result.getFailures()));
        }
      }
    }
  }

}

Extending AbstractTestSuite class allows to define tests sequence including even the same jUnit class in different places of the sequence.

public class JUnitTests extends AbstractTestSuite {

  protected void init() {
    tests.put(new JUnitTest1(), new String[]{"testInvoke", "testInvokeValidateResult"});
    tests.put(new JUnitTest2(), new String[]{"testInvoke"});
    tests.put(new JUnitTest1(), new String[]{"testInvokeOther"});
  }

  public static void main(String... args) throws Exception {
    new JUnitTests().runTests();
  }

}