package net.bytebuddy.implementation.bytecode.assign.primitive;
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 net.bytebuddy.test.utility.MockitoRule;
import org.junit.After;
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 org.objectweb.asm.Type;
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 PrimitiveUnboxingDelegateWideningTest {
private final Class<?> primitiveType;
private final Class<?> referenceType;
private final String unboxingMethodName;
private final String unboxingMethodDescriptor;
private final int wideningOpcode;
private final int sizeChange;
private final int interimMaximum;
@Rule
public TestRule mockitoRule = new MockitoRule(this);
@Mock
private TypeDescription.Generic referenceTypeDescription, primitiveTypeDescription;
@Mock
private Assigner chainedAssigner;
@Mock
private MethodVisitor methodVisitor;
@Mock
private Implementation.Context implementationContext;
public PrimitiveUnboxingDelegateWideningTest(Class<?> referenceType,
Class<?> primitiveType,
String unboxingMethodName,
String unboxingMethodDescriptor,
int wideningOpcode,
int sizeChange,
int interimMaximum) {
this.primitiveType = primitiveType;
this.referenceType = referenceType;
this.unboxingMethodName = unboxingMethodName;
this.unboxingMethodDescriptor = unboxingMethodDescriptor;
this.wideningOpcode = wideningOpcode;
this.sizeChange = sizeChange;
this.interimMaximum = interimMaximum;
}
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{Short.class, long.class, "shortValue", "()S", Opcodes.I2L, 1, 1},
{Short.class, float.class, "shortValue", "()S", Opcodes.I2F, 0, 0},
{Short.class, double.class, "shortValue", "()S", Opcodes.I2D, 1, 1},
{Integer.class, long.class, "intValue", "()I", Opcodes.I2L, 1, 1},
{Integer.class, float.class, "intValue", "()I", Opcodes.I2F, 0, 0},
{Integer.class, double.class, "intValue", "()I", Opcodes.I2D, 1, 1},
{Long.class, float.class, "longValue", "()J", Opcodes.L2F, 0, 1},
{Long.class, double.class, "longValue", "()J", Opcodes.L2D, 1, 1},
{Float.class, double.class, "floatValue", "()F", Opcodes.F2D, 1, 1},
});
}
@Before
public void setUp() throws Exception {
when(referenceTypeDescription.represents(referenceType)).thenReturn(true);
when(primitiveTypeDescription.isPrimitive()).thenReturn(true);
when(primitiveTypeDescription.represents(primitiveType)).thenReturn(true);
}
@After
public void tearDown() throws Exception {
verifyZeroInteractions(chainedAssigner);
verifyZeroInteractions(implementationContext);
}
@Test
public void testTrivialBoxing() throws Exception {
StackManipulation stackManipulation = PrimitiveUnboxingDelegate.forReferenceType(referenceTypeDescription)
.assignUnboxedTo(primitiveTypeDescription, chainedAssigner, Assigner.Typing.STATIC);
assertThat(stackManipulation.isValid(), is(true));
StackManipulation.Size size = stackManipulation.apply(methodVisitor, implementationContext);
assertThat(size.getSizeImpact(), is(sizeChange));
assertThat(size.getMaximalSize(), is(interimMaximum));
verify(methodVisitor).visitMethodInsn(Opcodes.INVOKEVIRTUAL,
Type.getInternalName(referenceType),
unboxingMethodName,
unboxingMethodDescriptor,
false);
verify(methodVisitor).visitInsn(wideningOpcode);
verifyNoMoreInteractions(methodVisitor);
}
}