package net.bytebuddy.implementation.bind.annotation;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.implementation.Implementation;
import net.bytebuddy.implementation.bytecode.StackManipulation;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.mockito.Mock;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import java.util.Arrays;
import java.util.Collection;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.mockito.Mockito.*;
@RunWith(Parameterized.class)
public class EmptyBinderTest extends AbstractAnnotationBinderTest<Empty> {
private final TypeDescription.Generic typeDescription;
private final int opcode;
@Mock
private MethodVisitor methodVisitor;
@Mock
private Implementation.Context implementationContext;
public EmptyBinderTest(Class<?> type, int opcode) {
super(Empty.class);
typeDescription = new TypeDescription.Generic.OfNonGenericType.ForLoadedType(type);
this.opcode = opcode;
}
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{boolean.class, Opcodes.ICONST_0},
{byte.class, Opcodes.ICONST_0},
{short.class, Opcodes.ICONST_0},
{char.class, Opcodes.ICONST_0},
{int.class, Opcodes.ICONST_0},
{long.class, Opcodes.LCONST_0},
{float.class, Opcodes.FCONST_0},
{double.class, Opcodes.DCONST_0},
{Object.class, Opcodes.ACONST_NULL}
});
}
@Override
protected TargetMethodAnnotationDrivenBinder.ParameterBinder<Empty> getSimpleBinder() {
return Empty.Binder.INSTANCE;
}
@Test
public void testEmptyValue() throws Exception {
when(target.getType()).thenReturn(typeDescription);
TargetMethodAnnotationDrivenBinder.ParameterBinding<?> binding = Empty.Binder
.INSTANCE.bind(annotationDescription,
source,
target,
implementationTarget,
assigner,
Assigner.Typing.STATIC);
assertThat(binding.isValid(), is(true));
StackManipulation.Size size = binding.apply(methodVisitor, implementationContext);
assertThat(size.getSizeImpact(), is(typeDescription.getStackSize().getSize()));
assertThat(size.getMaximalSize(), is(typeDescription.getStackSize().getSize()));
verify(methodVisitor).visitInsn(opcode);
verifyNoMoreInteractions(methodVisitor);
verifyZeroInteractions(implementationContext);
}
}