package net.bytebuddy.implementation.bytecode.constant;
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.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 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 DefaultValueTest {
private final Class<?> type;
private final int opcode;
@Rule
public TestRule mockitoRule = new MockitoRule(this);
@Mock
private MethodVisitor methodVisitor;
@Mock
private TypeDescription typeDescription;
@Mock
private Implementation.Context implementationContext;
public DefaultValueTest(Class<?> type, int opcode) {
this.type = type;
this.opcode = opcode;
}
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{void.class, -1},
{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}
});
}
@Before
public void setUp() throws Exception {
when(typeDescription.isPrimitive()).thenReturn(type.isPrimitive());
when(typeDescription.represents(type)).thenReturn(true);
}
@After
public void tearDown() throws Exception {
verifyZeroInteractions(implementationContext);
}
@Test
public void testDefaultValue() throws Exception {
StackManipulation stackManipulation = DefaultValue.of(typeDescription);
assertThat(stackManipulation.isValid(), is(true));
StackManipulation.Size size = stackManipulation.apply(methodVisitor, implementationContext);
assertThat(size.getSizeImpact(), is(StackSize.of(type).getSize()));
assertThat(size.getMaximalSize(), is(StackSize.of(type).getSize()));
if (opcode == -1) {
verifyZeroInteractions(methodVisitor);
} else {
verify(methodVisitor).visitInsn(opcode);
verifyNoMoreInteractions(methodVisitor);
}
}
}