package net.bytebuddy.implementation.bytecode;
import net.bytebuddy.description.type.TypeDefinition;
import net.bytebuddy.implementation.Implementation;
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.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 DuplicationWithFlipTest {
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{StackSize.SINGLE, StackSize.SINGLE, Opcodes.DUP_X1},
{StackSize.SINGLE, StackSize.DOUBLE, Opcodes.DUP_X2},
{StackSize.DOUBLE, StackSize.SINGLE, Opcodes.DUP2_X1},
{StackSize.DOUBLE, StackSize.DOUBLE, Opcodes.DUP2_X2}
});
}
@Rule
public TestRule mockitoRule = new MockitoRule(this);
@Mock
private TypeDefinition top, second;
@Mock
private MethodVisitor methodVisitor;
@Mock
private Implementation.Context implementationContext;
private final StackSize topSize, secondSize;
private final int opcode;
public DuplicationWithFlipTest(StackSize topSize, StackSize secondSize, int opcode) {
this.topSize = topSize;
this.secondSize = secondSize;
this.opcode = opcode;
}
@Before
public void setUp() throws Exception {
when(top.getStackSize()).thenReturn(topSize);
when(second.getStackSize()).thenReturn(secondSize);
}
@Test
public void testFlip() throws Exception {
StackManipulation stackManipulation = Duplication.of(top).flipOver(second);
assertThat(stackManipulation.isValid(), is(true));
StackManipulation.Size size = stackManipulation.apply(methodVisitor, implementationContext);
assertThat(size.getMaximalSize(), is(topSize.getSize()));
assertThat(size.getSizeImpact(), is(topSize.getSize()));
verify(methodVisitor).visitInsn(opcode);
verifyNoMoreInteractions(methodVisitor);
verifyZeroInteractions(implementationContext);
}
}