NPE: "Cannot invoke method getType() on null object" after a put()

[Ted M. Young]

For one particular test, we're getting an NPE from the REST-assured package. The stacktrace is below. The test is as follows:

  @Test

  public void responseStatusCodeIs200AndUserIsUpdatedWhenETagsMatch() throws Exception {

    Response response =

        given()

        .contentType(MediaType.APPLICATION_FORM_URLENCODED)

        .formParam("first", "First")

        .formParam("last", "Last")

        .formParam("username", "fname")

    .when()

        .put("/ab:1");

    String eTag = eTagFrom(response);

    given()

        .header("If-Match", eTag)

        .contentType(MediaType.APPLICATION_FORM_URLENCODED)

        .formParam("first", "First")

        .formParam("last", "L.")

        .formParam("username", "fl")

    .expect()

        .statusCode(200)

        .body("first", equalTo("First"))

        .body("last", equalTo("L."))

        .body("username", equalTo("fl"))

    .when()

        .put("/ab:1");

  }

The service is returning a 412 (because of a bug in the app code), but this test fails with an NPE instead of an incorrect expectation.

Any ideas?

java.lang.NullPointerException: Cannot invoke method getType() on null object

                at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:77)

                at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:45)

                at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)

                at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:32)

                at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)

                at com.jayway.restassured.internal.path.json.ConfigurableJsonSlurper.parse(ConfigurableJsonSlurper.groovy:93)

                at com.jayway.restassured.internal.path.json.ConfigurableJsonSlurper$parse.call(Unknown Source)

                at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)

                at com.jayway.restassured.internal.ContentParser.parse(ContentParser.groovy:36)

                at com.jayway.restassured.internal.ContentParser$parse.call(Unknown Source)

                at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124)

                at com.jayway.restassured.internal.ResponseSpecificationImpl$HamcrestAssertionClosure.validate(ResponseSpecificationImpl.groovy:389)

                at com.jayway.restassured.internal.ResponseSpecificationImpl$HamcrestAssertionClosure$validate.call(Unknown Source)

                at com.jayway.restassured.internal.RequestSpecificationImpl.invokeFilterChain(RequestSpecificationImpl.groovy:759)

                at com.jayway.restassured.internal.RequestSpecificationImpl$invokeFilterChain.callCurrent(Unknown Source)

                at com.jayway.restassured.internal.RequestSpecificationImpl.applyPathParamsAndSendRequest(RequestSpecificationImpl.groovy:1142)

                at com.jayway.restassured.internal.RequestSpecificationImpl.this$2$applyPathParamsAndSendRequest(RequestSpecificationImpl.groovy)

                at com.jayway.restassured.internal.RequestSpecificationImpl$this$2$applyPathParamsAndSendRequest.callCurrent(Unknown Source)

                at com.jayway.restassured.internal.RequestSpecificationImpl.put(RequestSpecificationImpl.groovy:139)

                at com.jayway.restassured.specification.RequestSender$put.call(Unknown Source)

                at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)

                at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)

                at com.jayway.restassured.internal.ResponseSpecificationImpl.put(ResponseSpecificationImpl.groovy:234)

                at com.guidewire.activitymanager.UserResourceIntegrationTest.responseStatusCodeIs200AndUserIsUpdatedWhenETagsMatch(UserResourceIntegrationTest.java:389)

                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

                at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)

                at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

                at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)

                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.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)

                at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)

                at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)

                at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)

                at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)

                at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)

                at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)

                at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)

                at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)

                at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)

                at org.junit.runners.ParentRunner.run(ParentRunner.java:309)

                at org.junit.runner.JUnitCore.run(JUnitCore.java:160)

                at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:77)

                at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)

                at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)

                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

                at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

[Johan Haleby]

What version of REST Assured are you using? If you're not using the latest one please upgrade and see if you still experience the same problems.

Regards,

/Johan

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[Ted M. Young [@jitterted]]

We're using 1.8.1. Not sure if it matters, but we had to exclude the Groovy from REST-Assured and depend on 2.1.2 separately, e.g.:

    <dependency>

      <groupId>com.jayway.restassured</groupId>

      <artifactId>rest-assured</artifactId>

      <version>1.8.1</version>

      <exclusions>

        <!-- Exclude Groovy because of classpath issue -->

        <exclusion>

          <groupId>org.codehaus.groovy</groupId>

          <artifactId>groovy</artifactId>

        </exclusion>

      </exclusions>

      <scope>test</scope>

    </dependency>

    <dependency>

      <groupId>org.codehaus.groovy</groupId>

      <artifactId>groovy-all</artifactId>

      <!-- Needs to be the same version that REST Assured depends on -->

      <version>2.1.2</version>

      <scope>test</scope>

    </dependency>

;ted

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[Johan Haleby]

Sorry for the veeery late response but could you please tell me how the response looks like? Preferably with all headers etc as well.

/Johan