I am trying to mimick file reading in my unit test case using powermockito, below is my code I want test
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;
public class FileOperation {
public List<String> readFromFile( String inputFilePath ) throws IOException {
List<String> lines = Files.readAllLines(Paths.get(inputFilePath));
return lines;
}
public void writeIntoFile(String result, String outputFilePath) throws IOException {
Files.write(Paths.get(outputFilePath), result.getBytes());
}
}
below is my testcase file
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import java.io.BufferedReader;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
@RunWith(PowerMockRunner.class)
@PrepareForTest(FileOperation.class)
public class FileOpertionTest {
@Before
public void setUp() throws Exception {
}
@Test
public void readFromFileTests() throws IOException {
//BufferedReader br= PowerMockito.mock(BufferedReader.class);
//PowerMockito.mockStatic(Paths.class);
PowerMockito.mockStatic(Files.class);
List<String> lines = new ArrayList<String>() {{
add("data1");
add("data2");
add("data13");
}};
Mockito.when(Files.readAllLines(Paths.get("somePath"))).thenReturn(lines);
FileOperation fileOperation = new FileOperation();
List<String> listOfWords = fileOperation.readFromFile("somePath");
assertEquals(listOfWords.size(), 3);
}
}
below is my maven dependency.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>clientProject</groupId>
<artifactId>clientProject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>clientProject</name>
<dependencies>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>1.7.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>1.7.0</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
but while running I am getting below exception
org.objenesis.ObjenesisException: java.lang.reflect.InvocationTargetException
at org.objenesis.instantiator.sun.SunReflectionFactoryHelper.newConstructorForSerialization(SunReflectionFactoryHelper.java:55)
at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.<init>(SunReflectionFactoryInstantiator.java:38)
at org.objenesis.strategy.StdInstantiatorStrategy.newInstantiatorOf(StdInstantiatorStrategy.java:58)
at org.objenesis.ObjenesisBase.getInstantiatorOf(ObjenesisBase.java:91)
at org.powermock.reflect.internal.WhiteboxImpl.newInstance(WhiteboxImpl.java:259)
at org.powermock.reflect.Whitebox.newInstance(Whitebox.java:139)
at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.getPowerMockTestListenersLoadedByASpecificClassLoader(AbstractTestSuiteChunkerImpl.java:95)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:174)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:48)
at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.createTestDelegators(AbstractTestSuiteChunkerImpl.java:108)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.<init>(JUnit4TestSuiteChunkerImpl.java:71)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.<init>(AbstractCommonPowerMockRunner.java:36)
at org.powermock.modules.junit4.PowerMockRunner.<init>(PowerMockRunner.java:34)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:70)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:37)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:70)
at org.junit.internal.requests.ClassRequest.createRunner(ClassRequest.java:28)
at org.junit.internal.requests.MemoizingRequest.getRunner(MemoizingRequest.java:19)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:90)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:76)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:49)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:526)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.objenesis.instantiator.sun.SunReflectionFactoryHelper.newConstructorForSerialization(SunReflectionFactoryHelper.java:45)
... 31 more
Caused by: java.lang.IllegalAccessError: class jdk.internal.reflect.ConstructorAccessorImpl loaded by org.powermock.core.classloader.MockClassLoader @68c4039c cannot access jdk/internal/reflect superclass jdk.internal.reflect.MagicAccessorImpl
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at org.powermock.core.classloader.MockClassLoader.loadUnmockedClass(MockClassLoader.java:262)
at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:206)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at org.powermock.core.classloader.MockClassLoader.loadUnmockedClass(MockClassLoader.java:262)
at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:206)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.System$2.defineClass(System.java:2196)
at java.base/jdk.internal.reflect.ClassDefiner.defineClass(ClassDefiner.java:65)
at java.base/jdk.internal.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:400)
at java.base/jdk.internal.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:394)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
at java.base/jdk.internal.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:393)
at java.base/jdk.internal.reflect.MethodAccessorGenerator.generateSerializationConstructor(MethodAccessorGenerator.java:112)
at java.base/jdk.internal.reflect.ReflectionFactory.generateConstructor(ReflectionFactory.java:462)
at java.base/jdk.internal.reflect.ReflectionFactory.newConstructorForSerialization(ReflectionFactory.java:375)
at jdk.unsupported/sun.reflect.ReflectionFactory.newConstructorForSerialization(ReflectionFactory.java:98)
... 36 more
I am using jdk 14 with compilation level of 1.8 I saw some post saying powermock has issue with higher jdks but I am not sure what dependencies I have to use to make it work?
Update 1:
from this answer I update my maven dependency to below
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.18.0</version> <!-- or higher, correspondning to powermock-version -->
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito2</artifactId>
<version>2.0.0-beta.5</version> <!-- or higher -->
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>2.0.0-beta.5</version> <!-- or higher -->
</dependency>
but now I am getting below exception.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.powermock.reflect.internal.WhiteboxImpl (file:/C:/Users/vihan/.m2/repository/org/powermock/powermock-reflect/2.0.0-beta.5/powermock-reflect-2.0.0-beta.5.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.powermock.reflect.internal.WhiteboxImpl
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
java.lang.RuntimeException: Internal error: Failed to find the "modifiers" field in method setInternalState.
at org.powermock.reflect.internal.WhiteboxImpl.sedModifiersToField(WhiteboxImpl.java:2354)
at org.powermock.reflect.internal.WhiteboxImpl.removeFinalModifierIfPresent(WhiteboxImpl.java:2318)
at org.powermock.reflect.internal.WhiteboxImpl.setField(WhiteboxImpl.java:2304)
at org.powermock.reflect.internal.WhiteboxImpl.setInternalState(WhiteboxImpl.java:304)
at org.powermock.reflect.internal.WhiteboxImpl.setInternalState(WhiteboxImpl.java:317)
at org.powermock.reflect.Whitebox.setInternalState(Whitebox.java:190)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:61)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:542)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.NoSuchFieldException: modifiers
at java.base/java.lang.Class.getDeclaredField(Class.java:2489)
at org.powermock.reflect.internal.WhiteboxImpl.sedModifiersToField(WhiteboxImpl.java:2348)
... 12 more
