public class Parameterized extends 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.
@RunWith(Parameterized.class) public class FibonacciTest { @Parameters(name= "{index}: fib({0})={1}") public static Iterable<Object[]> 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.
In order that you can easily identify the individual tests, you may provide a
name for the @Parameters
annotation. This name is allowed
to contain placeholders, which are replaced at runtime. The placeholders are
Parameterized
runner creates
names like [1: fib(3)=2]
. If you don't use the name parameter,
then the current parameter index is used as name.
You can also write:
@RunWith(Parameterized.class) public class FibonacciTest { @Parameters public static Iterable<Object[]> data() { return Arrays.asList(new Object[][] { { 0, 0 }, { 1, 1 }, { 2, 1 }, { 3, 2 }, { 4, 3 }, { 5, 5 }, { 6, 8 } }); } @Parameter(0) public int fInput; @Parameter(1) public int fExpected; @Test public void test() { assertEquals(fExpected, Fibonacci.compute(fInput)); } }
Each instance of FibonacciTest
will be constructed with the default constructor
and fields annotated by @Parameter
will be initialized
with the data values in the @Parameters
method.
Modifier and Type | Class and Description |
---|---|
static interface |
Parameterized.Parameter
Annotation for fields of the test class which will be initialized by the
method annotated by
Parameters By using directly this annotation, the test class constructor isn't needed. |
static interface |
Parameterized.Parameters
Annotation for a method which provides parameters to be injected into the
test class constructor by
Parameterized |
Suite.SuiteClasses
Constructor and Description |
---|
Parameterized(Class<?> klass)
Only called reflectively.
|
Modifier and Type | Method and Description |
---|---|
protected List<Runner> |
getChildren()
Returns a list of objects that define the children of this Runner.
|
describeChild, emptySuite, runChild
childrenInvoker, classBlock, classRules, collectInitializationErrors, filter, getDescription, getName, getRunnerAnnotations, getTestClass, run, runLeaf, setScheduler, sort, validatePublicVoidNoArgMethods, withAfterClasses, withBeforeClasses
protected List<Runner> getChildren()
ParentRunner
getChildren
in class Suite