title: Cannot parse object because no supported Content-Type was not specified in response. Content-Type was 'text/html;charset=utf-8'
body: <p>I'm trying to run the following Junit test:</p>
  
  <pre><code>@RunWith(SpringJUnit4ClassRunner.class)
  @ContextConfiguration(classes = { TestConfig.class, Account.class, AccountDao.class }, loader = AnnotationConfigContextLoader.class)
  public class AccountTest{
  
  
      private static final String URL_PREFIX = "http://localhost:8080/dsp2api";
      private String cookie;
  
      private RequestSpecification givenAuth() {
          // return RestAssured.given().auth().form("user", "userPass", formConfig);
          // if (cookie == null) {
          // cookie = RestAssured.given().contentType("application/x-www-form-urlencoded").formParam("password", "userPass").formParam("username", "user").post(URL_PREFIX + "/login").getCookie("JSESSIONID");
          // }
          // return RestAssured.given().cookie("JSESSIONID", cookie);
          return RestAssured.given()
              .auth()
              .basic("user", "userPass");
  }
      @Test
      public void whenMethodArgumentMismatch_thenBadRequest() {
          Response response = givenAuth().get(URL_PREFIX + "/api/foos/ccc");
          ApiError error = response.as(ApiError.class);
  
          assertEquals(HttpStatus.BAD_REQUEST, error.getCode());
          assertEquals(1, error.getErreur().length());
      }
  
  }
  </code></pre>
  
  <p>But when I do, I get the following error:</p>
  
  <pre><code>java.lang.IllegalStateException: Cannot parse object because no supported Content-Type was not specified in response. Content-Type was 'text/html;charset=utf-8'.
      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.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:83)
      at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:105)
      at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:60)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:235)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:247)
      at com.jayway.restassured.internal.mapping.ObjectMapping.deserialize(ObjectMapping.groovy:82)
      at com.jayway.restassured.internal.mapping.ObjectMapping$deserialize.call(Unknown Source)
      at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
      at com.jayway.restassured.internal.RestAssuredResponseOptionsGroovyImpl.as(RestAssuredResponseOptionsGroovyImpl.groovy:216)
      at com.jayway.restassured.internal.RestAssuredResponseOptionsImpl.as(RestAssuredResponseOptionsImpl.java:159)
      at com.app.dsp2api.test.AccountTest.whenMethodArgumentMismatch_thenBadRequest(AccountTest.java:40)
      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: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.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:252)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
      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:191)
      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)
  </code></pre>
  
  <p>The ErrorApi I'm basing my test on is this one: </p>
  
  <pre><code>public class ApiError {
  
      private HttpStatus code;
      private String erreur; 
      private String description;
  
      public ApiError() {
  
      }
  
      public ApiError(HttpStatus code, String erreur, String description) {
          this.code = code;
          this.erreur = erreur;
          this.description = description;
      }
  
      public HttpStatus getCode() {
          return code;
      }
  
      public void setCode(HttpStatus code) {
          this.code = code;
      }
  
      public String getErreur() {
          return erreur;
      }
  
      public void setErreur(String erreur) {
          this.erreur = erreur;
      }
  
      public String getDescription() {
          return description;
      }
  
      public void setDescription(String description) {
          this.description = description;
      } 
  
  
  }
  </code></pre>
  
  <p>And Here's my exception handler:</p>
  
  <pre><code>@ControllerAdvice
  public class RestExceptionHandler extends ResponseEntityExceptionHandler{
  
      @Override
      protected ResponseEntity&lt;Object&gt; handleMissingServletRequestParameter(
        MissingServletRequestParameterException ex, HttpHeaders headers, 
        HttpStatus status, WebRequest request) {
          String error = ex.getParameterName() + " Requête invalide";
  
          ApiError apiError = 
            new ApiError(HttpStatus.BAD_REQUEST,ex.getLocalizedMessage(), error );
          return new ResponseEntity&lt;Object&gt;(apiError, new HttpHeaders(), apiError.getCode());
      }
  
  }
  </code></pre>
  
  <p>What I would like to know now is where can I specify the content-type (json) so that this error disappears? </p>
  
  <p>Thanks in advance for your help.</p>
  
  <p><strong>UPDATE 1</strong>:</p>
  
  <p>Changed the following line:</p>
  
  <pre><code>Response response = givenAuth().get(URL_PREFIX + "/api/foos/ccc");
  </code></pre>
  
  <p>To:</p>
  
  <pre><code>Response response = givenAuth().log().all().header("ContentType","application/json").when().get(URL_PREFIX);
  </code></pre>
  
  <p>But it didn't fix the problem.</p>