Hive GUDF custom unzip function test case failing with error "B cannot be cast to org.apache.hadoop.io.BytesWritable"

I'm writing test case for Generic UDF custom unzip evaluate function which does unzipping of zip files. This jar is used in Hivequery. Here code for test case,

public void testEvaluate() throws HiveException, IOException {
    Unzip unzip = new Unzip();
    File resourcesDirectory = new File("src/test/resources/test.zip");
    byte[] bytes = Files.readAllBytes( resourcesDirectory.toPath() );

    ObjectInspector binaryOI = PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
    ObjectInspector[] arguments = {binaryOI};
    unzip.initialize(arguments);

    GenericUDF.DeferredObject valueObj0 = new GenericUDF.DeferredJavaObject(bytes);
    GenericUDF.DeferredObject[] args = { valueObj0 };

    unzip.evaluate(args  );}

I'm getting error as below,

java.lang.ClassCastException: [B cannot be cast to org.apache.hadoop.io.BytesWritable

at org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableBinaryObjectInspector.getPrimitiveJavaObject(WritableBinaryObjectInspector.java:49)
at Unzip.evaluate(Unzip.java:32)
at UnzipTest.testEvaluate(UnzipTest.java:96)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

The error is occuring at line when reading bytes from DeferredObject[] args,

 -  byte[] input = elementOI.getPrimitiveJavaObject( arg[0].get() );

PS: test.zip contains a text file(with test string) zipped to test.zip