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JMockit is a Java toolkit for automated developer testing.
It contains APIs for the creation of the objects to be tested, for mocking dependencies, and for faking external
APIs; JUnit (4 & 5) and TestNG test runners are supported.
It also contains an advanced code coverage tool.
/*
* Copyright (c) 2006 Rogério Liesenfeld
* This file is subject to the terms of the MIT license (see LICENSE.txt).
*/
package mockit.internal.mockups;
import javax.annotation.*;
import mockit.*;
import mockit.external.asm.*;
import mockit.internal.*;
import mockit.internal.state.*;
import mockit.internal.util.*;
import static mockit.external.asm.ClassReader.*;
import static mockit.external.asm.Opcodes.*;
/**
* Responsible for collecting the signatures of all methods defined in a given mock class which are explicitly annotated
* as {@link Mock mocks}.
*/
final class MockMethodCollector extends ClassVisitor
{
private static final int INVALID_METHOD_ACCESSES = ACC_BRIDGE + ACC_SYNTHETIC + ACC_ABSTRACT + ACC_NATIVE;
@Nonnull private final MockMethods mockMethods;
private boolean collectingFromSuperClass;
@Nullable private String enclosingClassDescriptor;
MockMethodCollector(@Nonnull MockMethods mockMethods) { this.mockMethods = mockMethods; }
void collectMockMethods(@Nonnull Class> mockClass)
{
ClassLoad.registerLoadedClass(mockClass);
Class> classToCollectMocksFrom = mockClass;
do {
ClassReader mcReader = ClassFile.readFromFile(classToCollectMocksFrom);
mcReader.accept(this, SKIP_CODE + SKIP_FRAMES);
classToCollectMocksFrom = classToCollectMocksFrom.getSuperclass();
collectingFromSuperClass = true;
}
while (classToCollectMocksFrom != Object.class && classToCollectMocksFrom != MockUp.class);
}
@Override
public void visit(
int version, int access, @Nonnull String name, @Nullable String signature, @Nullable String superName,
@Nullable String[] interfaces)
{
if (!collectingFromSuperClass) {
mockMethods.setMockClassInternalName(name);
int p = name.lastIndexOf('$');
if (p > 0) {
enclosingClassDescriptor = "(L" + name.substring(0, p) + ";)V";
}
}
}
/**
* Adds the method specified to the set of mock methods, as long as it's annotated with {@code @Mock}.
*
* @param methodSignature generic signature for a Java 5 generic method, ignored since redefinition only needs to
* consider the "erased" signature
* @param exceptions zero or more thrown exceptions in the method "throws" clause, also ignored
*/
@SuppressWarnings("ParameterNameDiffersFromOverriddenParameter")
@Nullable @Override
public MethodVisitor visitMethod(
int access, @Nonnull String methodName, @Nonnull String methodDesc, String methodSignature, String[] exceptions)
{
if ((access & INVALID_METHOD_ACCESSES) != 0) {
return null;
}
if ("".equals(methodName)) {
if (!collectingFromSuperClass && methodDesc.equals(enclosingClassDescriptor)) {
enclosingClassDescriptor = null;
}
return null;
}
return new MockMethodVisitor(access, methodName, methodDesc);
}
private final class MockMethodVisitor extends MethodVisitor
{
private final int access;
@Nonnull private final String methodName;
@Nonnull private final String methodDesc;
MockMethodVisitor(int access, @Nonnull String methodName, @Nonnull String methodDesc)
{
this.access = access;
this.methodName = methodName;
this.methodDesc = methodDesc;
}
@Nullable @Override
public AnnotationVisitor visitAnnotation(@Nullable String desc, boolean visible)
{
if ("Lmockit/Mock;".equals(desc)) {
MockMethods.MockMethod mockMethod =
mockMethods.addMethod(collectingFromSuperClass, access, methodName, methodDesc);
if (mockMethod != null) {
return new MockAnnotationVisitor(mockMethod);
}
}
return null;
}
@Override
public void visitLocalVariable(
@Nonnull String name, @Nonnull String desc, String signature, Label start, Label end, @Nonnegative int index)
{
String classDesc = mockMethods.getMockClassInternalName();
ParameterNames.registerName(classDesc, access, methodName, methodDesc, desc, name, index);
}
}
private final class MockAnnotationVisitor extends AnnotationVisitor
{
@Nonnull private final MockMethods.MockMethod mockMethod;
@Nullable private MockState mockState;
private MockAnnotationVisitor(@Nonnull MockMethods.MockMethod mockMethod)
{
this.mockMethod = mockMethod;
if (mockMethod.requiresMockState()) {
getMockState();
}
}
@Override
public void visit(String name, Object value)
{
Integer numInvocations = (Integer) value;
if ("invocations".equals(name)) {
getMockState().expectedInvocations = numInvocations;
}
else if ("minInvocations".equals(name)) {
getMockState().minExpectedInvocations = numInvocations;
}
else { // "maxInvocations"
getMockState().maxExpectedInvocations = numInvocations;
}
}
@Nonnull
private MockState getMockState()
{
if (mockState == null) {
mockState = new MockState(mockMethod);
}
return mockState;
}
@Override
public void visitEnd()
{
if (mockState != null) {
if (mockMethod.canBeReentered()) {
mockState.makeReentrant();
}
mockMethods.addMockState(mockState);
}
}
}
}
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