package mockit;
   
   import static org.junit.jupiter.api.Assertions.assertEquals;
   import static org.junit.jupiter.api.Assertions.assertTrue;
   
   import mockit.internal.expectations.invocation.MissingInvocation;
   
   import org.junit.Test;
   
  /**
   * The Class TestedAndMockedTest.
   */
  public final class TestedAndMockedTest {
  
      /**
       * The Class ClassToBeTested.
       */
      public static class ClassToBeTested {
  
          /** The some data. */
          private final String someData;
  
          /** The output data. */
          String outputData;
  
          /** The collaborator. */
          AnotherClassToBeTested collaborator;
  
          /**
           * Instantiates a new class to be tested.
           *
           * @param someData
           *            the some data
           */
          public ClassToBeTested(String someData) {
              this.someData = someData;
          }
  
          /**
           * Do some operation.
           *
           * @param i
           *            the i
           * @param s
           *            the s
           *
           * @return true, if successful
           */
          public boolean doSomeOperation(int i, String s) {
              validateInput(i, s);
              int j = i + doSomething();
              doSomethingElse(s);
              return j > 0;
          }
  
          /**
           * Validate input.
           *
           * @param i
           *            the i
           * @param s
           *            the s
           */
          static void validateInput(int i, String s) {
              if (i <= 0 || s == null) {
                  throw new IllegalArgumentException();
              }
          }
  
          /**
           * Do something.
           *
           * @return the int
           */
          int doSomething() {
              return -1;
          }
  
          /**
           * Do something else.
           *
           * @param s
           *            the s
           */
          void doSomethingElse(String s) {
              outputData = "output data: " + s;
          }
  
          /**
           * Do another operation.
           *
           * @return the int
           */
          int doAnotherOperation() {
              return collaborator.doSomething() - 23;
          }
      }
  
      /**
      * The Class AnotherClassToBeTested.
      */
     static final class AnotherClassToBeTested {
         /**
          * Do something.
          *
          * @return the int
          */
         int doSomething() {
             return 123;
         }
     }
 
     /** The tested and injected. */
     @Tested
     AnotherClassToBeTested testedAndInjected;
 
     /** The tested. */
     @Tested(fullyInitialized = true)
     @Mocked
     ClassToBeTested tested;
 
     /** The test data. */
     @Injectable
     final String testData = "test data";
 
     /**
      * Exercise public method while having helper methods mocked.
      */
     @Test
     public void exercisePublicMethodWhileHavingHelperMethodsMocked() {
         assertEquals(testData, tested.someData);
 
         new Expectations() {
             {
                 tested.doSomething();
                 result = 123;
             }
         };
         new Expectations() {
             {
                 ClassToBeTested.validateInput(anyInt, anyString);
             }
         };
 
         boolean result = tested.doSomeOperation(0, "testing");
 
         assertTrue(result);
         assertEquals("output data: testing", tested.outputData);
 
         new Verifications() {
             {
                 tested.doSomethingElse(anyString);
                 times = 1;
             }
         };
     }
 
     /**
      * Exercise top level tested object together with injected second level tested object.
      */
     @Test
     public void exerciseTopLevelTestedObjectTogetherWithInjectedSecondLevelTestedObject() {
         assertEquals(123, testedAndInjected.doSomething());
         assertEquals(100, tested.doAnotherOperation());
     }
 
     /**
      * Mock tested class.
      *
      * @param mock
      *            the mock
      */
     @Test(expected = MissingInvocation.class)
     public void mockTestedClass(@Mocked final ClassToBeTested mock) {
         new Expectations() {
             {
                 mock.doSomethingElse("");
             }
         };
     }
 }