package net.bytebuddy.implementation.bytecode.member;
import net.bytebuddy.implementation.Implementation;
import net.bytebuddy.implementation.bytecode.StackManipulation;
import net.bytebuddy.test.utility.MockitoRule;
import net.bytebuddy.test.utility.ObjectPropertyAssertion;
import net.bytebuddy.utility.JavaConstant;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestRule;
import org.mockito.Mock;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import static org.mockito.Mockito.*;
public class HandleInvocationTest {
@Rule
public TestRule mockitoRule = new MockitoRule(this);
@Mock
private MethodVisitor methodVisitor;
@Mock
private Implementation.Context implementationContext;
@Test
public void testInvocationDecreasingStack() throws Exception {
JavaConstant.MethodType methodType = JavaConstant.MethodType.of(void.class, Object.class);
StackManipulation stackManipulation = new HandleInvocation(methodType);
assertThat(stackManipulation.isValid(), is(true));
StackManipulation.Size size = stackManipulation.apply(methodVisitor, implementationContext);
assertThat(size.getSizeImpact(), is(-1));
assertThat(size.getMaximalSize(), is(0));
verify(methodVisitor).visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/invoke/MethodHandle", "invokeExact", "(Ljava/lang/Object;)V", false);
verifyNoMoreInteractions(methodVisitor);
verifyZeroInteractions(implementationContext);
}
@Test
public void testInvocationIncreasingStack() throws Exception {
JavaConstant.MethodType methodType = JavaConstant.MethodType.of(Object.class);
StackManipulation stackManipulation = new HandleInvocation(methodType);
assertThat(stackManipulation.isValid(), is(true));
StackManipulation.Size size = stackManipulation.apply(methodVisitor, implementationContext);
assertThat(size.getSizeImpact(), is(1));
assertThat(size.getMaximalSize(), is(1));
verify(methodVisitor).visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/invoke/MethodHandle", "invokeExact", "()Ljava/lang/Object;", false);
verifyNoMoreInteractions(methodVisitor);
verifyZeroInteractions(implementationContext);
}
@Test
public void testObjectProperties() throws Exception {
ObjectPropertyAssertion.of(HandleInvocation.class).apply();
}
}