JUnit forRest API with File Uploader fails with 406 Error

Question

I have RestAPI which containing file Uploder I want to write JUnit for that. But its failing with following error.

java.lang.AssertionError: Status expected:<200> but was:<406> at org.springframework.test.util.AssertionErrors.fail(AssertionErrors.java:55) at org.springframework.test.util.AssertionErrors.assertEquals(AssertionErrors.java:82) at org.springframework.test.web.servlet.result.StatusResultMatchers.lambda$matcher$9(StatusResultMatchers.java:617) at org.springframework.test.web.servlet.MockMvc$1.andExpect(MockMvc.java:178) at com.nokia.cem.ui.controllers.CgfDesignTest.SavePageConfigTest(CgfDesignTest.java:85) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73) at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)

Controller:

@RequestMapping(
       method = RequestMethod.PUT, 
       value = "/pageconfig/v1/{applicationName}/{usecaseName}", 
       consumes = MediaType.MULTIPART_FORM_DATA_VALUE, 
       produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<?> saveCGFConfiguration(
        @RequestHeader(value = CEMAppConstants.AUTHORIZATION) String token,
        @PathVariable String applicationName,
        @PathVariable String usecaseName,
        @RequestPart(CEMAppConstants.FILE) MultipartFile file)
        throws BeansException, IOException {

    commonService.isTokenAndApplicationNameValid(token, applicationName);

    return ResponseEntity.status(HttpStatus.OK)
            .body(cgfPageconfigService.saveCgfPageconfig(applicationName, file, usecaseName));
}

Junit:

@Test
public void SavePageConfigTest() throws Exception {
    FileInputStream inputFile = new FileInputStream( "src/test/resource/umappedResponse.json");  
    MockMultipartFile file = new MockMultipartFile("file", "umappedResponse", "multipart/form-data", inputFile);


    when(cgfpageconfigService.saveCgfPageconfig(application, file, usecase))
            .thenReturn("{\"MESSAGE\":\"CGF pageConfig is saved successfully \"}");
    mockMvc.perform(put("/api/cgf/pageconfig/v1/"+application+"/"+usecase).accept(MediaType.MULTIPART_FORM_DATA_VALUE)
            .contentType(MediaType.MULTIPART_FORM_DATA_VALUE).header("Authorization", Auth))
            .andExpect(status().isOk())
            .andExpect(content().string("{\"MESSAGE\":\"CGF pageConfig is saved successfully \"}"));

}