package net.bytebuddy.implementation.bytecode.member;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.method.ParameterList;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.implementation.Implementation;
import net.bytebuddy.implementation.bytecode.StackManipulation;
import net.bytebuddy.implementation.bytecode.StackSize;
import net.bytebuddy.test.utility.MockitoRule;
import org.junit.Before;
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.hamcrest.MatcherAssert.assertThat;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
public class MethodInvocationHandleTest {
private static final String FOO = "foo", BAR = "bar", QUX = "qux", BAZ = "baz";
@Rule
public TestRule mockitoRule = new MockitoRule(this);
@Mock
private MethodDescription.InDefinedShape methodDescription;
@Mock
private TypeDescription.Generic returnType;
@Mock
private TypeDescription declaringType, firstType, secondType;
@Mock
private Implementation.Context implementationContext;
@Mock
private MethodVisitor methodVisitor;
@Before
public void setUp() throws Exception {
when(methodDescription.asDefined()).thenReturn(methodDescription);
when(methodDescription.getReturnType()).thenReturn(returnType);
when(methodDescription.getDeclaringType()).thenReturn(declaringType);
when(returnType.getStackSize()).thenReturn(StackSize.ZERO);
when(firstType.getStackSize()).thenReturn(StackSize.ZERO);
when(firstType.getDescriptor()).thenReturn(FOO);
when(secondType.getDescriptor()).thenReturn(BAR);
when(secondType.getStackSize()).thenReturn(StackSize.ZERO);
when(returnType.getStackSize()).thenReturn(StackSize.ZERO);
when(methodDescription.getInternalName()).thenReturn(QUX);
when(methodDescription.getDescriptor()).thenReturn(BAZ);
when(declaringType.getDescriptor()).thenReturn(BAR);
when(methodDescription.getParameters()).thenReturn(new ParameterList.Explicit.ForTypes(methodDescription, firstType, secondType));
}
@Test
public void testExactHandleStatic() throws Exception {
when(methodDescription.isStatic()).thenReturn(true);
StackManipulation stackManipulation = MethodInvocation.invoke(methodDescription).onHandle(MethodInvocation.HandleType.EXACT);
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", BAZ, false);
}
@Test
public void testExactHandleConstructor() throws Exception {
when(methodDescription.isConstructor()).thenReturn(true);
StackManipulation stackManipulation = MethodInvocation.invoke(methodDescription).onHandle(MethodInvocation.HandleType.EXACT);
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", BAZ, false);
}
@Test
public void testExactHandleNonStatic() throws Exception {
StackManipulation stackManipulation = MethodInvocation.invoke(methodDescription).onHandle(MethodInvocation.HandleType.EXACT);
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", "(" + BAR + BAZ.substring(1), false);
}
@Test
public void testMethodNames() throws Exception {
assertThat(MethodInvocation.HandleType.EXACT.getMethodName(), is("invokeExact"));
assertThat(MethodInvocation.HandleType.REGULAR.getMethodName(), is("invoke"));
}
}