Testing OSGi components - JUnit in Action - page 321

Chapter 7 introduced mock objects, and we saw mock objects frameworks that can
produce fake instances of interfaces that we can use in tests. That's exactly what we're
going to do in listing 16.8.

Listing 16.8 Mock test for the CalculatorService

[...]
public class TestClientCalculatorServiceMock {

B
C

private Mockery context = new JUnit4Mockery();

private BundleContext mockBundleContext;

D

private ServiceReference mockServiceReference;

@Before
public void setUp() {
mockBundleContext = context.mock( BundleContext.class );
mockServiceReference = context.mock( ServiceReference.class );
final CalculatorImpl service = new CalculatorImpl();

E

context.checking( new Expectations()
{
{
oneOf(mockBundleContext).getServiceReference(
CalculatorService. class .getName());
will(returnValue(mockServiceReference));
oneOf(mockBundleContext).getService(mockServiceReference);
will(returnValue(service));
oneOf(mockBundleContext).ungetService(mockServiceReference);
}
} );
}

F

G

@Test
public void testAddMethod() throws Exception {
ClientBundleActivator activator = new ClientBundleActivator();
activator.setOperation( "add" );
activator.setUserNumberInput( "1 2 3 4 5 6 7 8 9" );
activator.start( mockBundleContext );
assertEquals( "The result is not the same as expected",
activator.getResult(), 45, 0 );
}

H

I

J

@Test
public void testMultiplyMethod() throws Exception {
ClientBundleActivator activator = new ClientBundleActivator();
activator.setOperation( "multiply" );

1)

activator.setUserNumberInput( "1 2 3 4 5 6 7 8 9" );
activator.start( mockBundleContext );
assertEquals( "The result is not the same as expected",
activator.getResult(), 362880, 0 );
}
}