Mockito + PowerMock + TestNG + Libgdx - libgdx

Question

I'm trying add the powermock library to the working project, but I'm getting errors.
How I add it:
1) AbsTest extends PowerMockTestCase
2) Build.gradle dependencies
3) In some test add #PrepareForTest({SomeClass.class}). After this step this error occured.
In build.gradle all libraries are included.
Error occured in a place where initialize HeadlessApplication for use Gdx.* static vars.
All tests in project extend this class:
abstract public class AbsTest extends PowerMockTestCase {
static {
initGdx();
}
protected static void initGdx() {
// Initialize libgdx headless for use static vars (e.g. Gdx.input.setInputProcessor)
final HeadlessApplicationConfiguration config = new HeadlessApplicationConfiguration();
config.renderInterval = 1f / 60; // Likely want 1f/60 for 60 fps
new HeadlessApplication(mock(Core.class), config); <=== ERROR LINE
}
#BeforeMethod(alwaysRun = true)
public void initMethod() throws Exception {
// Initialize mocks
MockitoAnnotations.initMocks(this);
}
}
Errors:
org.testng.TestNGException: An error occurred while instantiating
class ru.coolone.adventure_emulation.input.InputGroupsTest: null at
org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:435)
at
org.testng.internal.ClassHelper.createInstance(ClassHelper.java:336)
at
org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:125)
at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:190) at
org.testng.TestClass.getInstances(TestClass.java:95) at
org.testng.TestClass.initTestClassesAndInstances(TestClass.java:81)
at org.testng.TestClass.init(TestClass.java:73) at
org.testng.TestClass.(TestClass.java:38) at
org.testng.TestRunner.initMethods(TestRunner.java:389) at
org.testng.TestRunner.init(TestRunner.java:271) at
org.testng.TestRunner.init(TestRunner.java:241) at
org.testng.TestRunner.(TestRunner.java:167) at
org.testng.SuiteRunner$DefaultTestRunnerFactory.newTestRunner(SuiteRunner.java:663)
at org.testng.SuiteRunner.init(SuiteRunner.java:260) at
org.testng.SuiteRunner.(SuiteRunner.java:198) at
org.testng.TestNG.createSuiteRunner(TestNG.java:1271) at
org.testng.TestNG.createSuiteRunners(TestNG.java:1249) at
org.testng.TestNG.runSuitesLocally(TestNG.java:1107) at
org.testng.TestNG.runSuites(TestNG.java:1028) at
org.testng.TestNG.run(TestNG.java:996) at
org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72) at
org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:127)
Caused by: java.lang.ExceptionInInitializerError at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.powermock.modules.testng.internal.TestClassInstanceFactory.create(TestClassInstanceFactory.java:51)
at
org.powermock.modules.testng.internal.PowerMockClassloaderObjectFactory.newInstance(PowerMockClassloaderObjectFactory.java:46)
at
org.powermock.modules.testng.PowerMockObjectFactory.newInstance(PowerMockObjectFactory.java:43)
at
org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:423)
... 21 more Caused by: java.lang.IllegalStateException: Could not
initialize plugin: interface org.mockito.plugins.MockMaker at
org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:66)
at com.sun.proxy.$Proxy19.isTypeMockable(Unknown Source) at
org.mockito.internal.util.MockUtil.typeMockabilityOf(MockUtil.java:29)
at
org.mockito.internal.util.MockCreationValidator.validateType(MockCreationValidator.java:22)
at
org.mockito.internal.creation.MockSettingsImpl.validatedSettings(MockSettingsImpl.java:186)
at
org.mockito.internal.creation.MockSettingsImpl.confirm(MockSettingsImpl.java:180)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62) at
org.mockito.Mockito.mock(Mockito.java:1729) at
org.mockito.Mockito.mock(Mockito.java:1642) at
ru.coolone.adventure_emulation.AbsTest.initGdx(AbsTest.java:37) at
ru.coolone.adventure_emulation.AbsTest.(AbsTest.java:30) ...
29 more Caused by: java.lang.IllegalStateException: Failed to load
interface org.mockito.plugins.MockMaker implementation declared in
sun.misc.CompoundEnumeration#7dc3712 at
org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:101)
at
org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:45)
at
org.mockito.internal.configuration.plugins.PluginRegistry.(PluginRegistry.java:18)
at
org.mockito.internal.configuration.plugins.Plugins.(Plugins.java:17)
at org.mockito.internal.util.MockUtil.(MockUtil.java:24) ...
37 more Caused by: java.lang.ClassCastException: Cannot cast
org.powermock.api.mockito.mockmaker.PowerMockMaker to
org.mockito.plugins.MockMaker at
java.lang.Class.cast(Class.java:3369) at
org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:97)
... 41 more
build.gradle:
...
testCompile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
testCompile "com.badlogicgames.gdx:gdx-backend-headless:$gdxVersion"
testCompile 'org.testng:testng:6.13.1'
testCompile "org.mockito:mockito-core:2.8.9"
testCompile "org.powermock:powermock-api-mockito2:1.7.3"
testCompile "org.powermock:powermock-module-testng:1.7.3"
...

Answer 1

I'm fixed this. Im just move initGdx(); to overloaded beforePowerMockTestMethod() or beforePowerMockTestClass() and delete mockito annotations initialization because it execute in the parent class.
fixed AbsTest class:
abstract public class AbsTest extends PowerMockTestCase {
protected static void initGdx() {
// Initialize libgdx headless for use static vars (e.g. Gdx.input.setInputProcessor)
final HeadlessApplicationConfiguration config = new HeadlessApplicationConfiguration();
config.renderInterval = 1f / 60; // Likely want 1f/60 for 60 fps
new HeadlessApplication(mock(Core.class), config);
}
#BeforeMethod
#Override
protected void beforePowerMockTestMethod() throws Exception {
initGdx();
super.beforePowerMockTestMethod();
}
}
or with overload beforePowerMockTestClass method
abstract public class AbsTest extends PowerMockTestCase {
protected static void initGdx() {
// Initialize libgdx headless for use static vars (e.g. Gdx.input.setInputProcessor)
final HeadlessApplicationConfiguration config = new HeadlessApplicationConfiguration();
config.renderInterval = 1f / 60; // Likely want 1f/60 for 60 fps
new HeadlessApplication(mock(Core.class), config);
}
#BeforeClass
#Override
protected void beforePowerMockTestClass() throws Exception {
super.beforePowerMockTestClass();
initGdx();
}
}