checkers.util.test

Class CheckerParameterized

java.lang.Object

org.junit.runner.Runner

org.junit.runners.ParentRunner<org.junit.runner.Runner>

org.junit.runners.Suite

checkers.util.test.CheckerParameterized

All Implemented Interfaces:

org.junit.runner.Describable, org.junit.runner.manipulation.Filterable, org.junit.runner.manipulation.Sortable

public class CheckerParameterized
extends org.junit.runners.Suite

The custom runner Parameterized implements parameterized tests. When running a parameterized test class, instances are created for the cross-product of the test methods and the test data elements.

For example, to test a Fibonacci function, write:

 @RunWith(Parameterized.class)
 public class FibonacciTest {
  @Parameters
  public static Collection<Object[]> data() {
      return Arrays.asList(new Object[][] {
              Fibonacci,
              { { 0, 0 }, { 1, 1 }, { 2, 1 }, { 3, 2 }, { 4, 3 }, { 5, 5 },
                      { 6, 8 } } });
  }

  private int fInput;

  private int fExpected;

  public FibonacciTest(int input, int expected) {
      fInput= input;
      fExpected= expected;
  }

  @Test
  public void test(@HeresHowYouGetValue Type value) {
      assertAnswerKey(new Object[][] {
              Fibonacci,
              { { 0, 0 }, { 1, 1 }, { 2, 1 }, { 3, 2 }, { 4, 3 }, { 5, 5 },
                      { 6, 8 } } });
      assertEquals(fExpected, Fibonacci.compute(fInput));
  }
 }
 

Each instance of FibonacciTest will be constructed using the two-argument constructor and the data values in the @Parameters method.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CheckerParameterized.Name

Nested classes/interfaces inherited from class org.junit.runners.Suite

org.junit.runners.Suite.SuiteClasses

Constructor Summary

Constructors

Constructor and Description
CheckerParameterized(Class<?> klass) Only called reflectively.

Method Summary

Methods

Modifier and Type	Method and Description
protected List<org.junit.runner.Runner>	getChildren()

Methods inherited from class org.junit.runners.Suite

describeChild, emptySuite, runChild

Methods inherited from class org.junit.runners.ParentRunner

childrenInvoker, classBlock, collectInitializationErrors, filter, getDescription, getName, getTestClass, run, setScheduler, sort, validatePublicVoidNoArgMethods, withAfterClasses, withBeforeClasses

Methods inherited from class org.junit.runner.Runner

testCount

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CheckerParameterized

public CheckerParameterized(Class<?> klass)
                     throws Throwable

Only called reflectively. Do not use programmatically.

Throws:

Throwable

Method Detail

getChildren

protected List<org.junit.runner.Runner> getChildren()

Overrides:

getChildren in class org.junit.runners.Suite