org.junit.runners
Class Parameterized

java.lang.Object
  org.junit.runner.Runner
      org.junit.internal.runners.TestClassRunner
          org.junit.runners.Parameterized

All Implemented Interfaces:

Filterable, Sortable

public class Parameterized
extends org.junit.internal.runners.TestClassRunner

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 data() {
          return Arrays.asList(new Object[][] { { 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() {
       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

static interface	Parameterized.Parameters
static class	Parameterized.RunAllParameterMethods

Field Summary

Fields inherited from class org.junit.internal.runners.TestClassRunner

fEnclosedRunner

Constructor Summary

Parameterized(java.lang.Class<?> klass)

Method Summary

static java.util.Collection<java.lang.Object[]>	eachOne(java.lang.Object... params)
protected void	validate(org.junit.internal.runners.MethodValidator methodValidator)

Methods inherited from class org.junit.internal.runners.TestClassRunner

filter, getDescription, getTestClass, run, sort

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

Parameterized

public Parameterized(java.lang.Class<?> klass)
              throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

eachOne

public static java.util.Collection<java.lang.Object[]> eachOne(java.lang.Object... params)

validate

protected void validate(org.junit.internal.runners.MethodValidator methodValidator)

Overrides:

validate in class org.junit.internal.runners.TestClassRunner