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JUnit test suites

A JUnit test suite is a collection of test classes that are combined and executed together. Test suites provide a way to group related tests and run them as a single unit. There are two ways to create test suites in JUnit: using annotations or using a suite class.

  1. Annotation-based test suite:
import org.junit.runner.RunWith;
import org.junit.runners.Suite;

@RunWith(Suite.class)
@Suite.SuiteClasses({
   TestClassA.class,
   TestClassB.class,
   TestClassC.class
})
public class TestSuiteExample {
   // the class remains empty, used only as a holder for the above annotations
}
  1. Suite class:
import org.junit.runner.RunWith;
import org.junit.runners.Suite;

@RunWith(Suite.class)
public class TestSuiteExample {
   public static void main(String[] args) {
      org.junit.runner.JUnitCore.runClasses(
            TestClassA.class,
            TestClassB.class,
            TestClassC.class
      );
   }
}
In both cases, when the test suite is executed, all the tests in the test classes TestClassA, TestClassB, and TestClassC will be run.


Next: JUnit parameterized tests

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