android – 运行单元测试用例时的Multidex限制命中

Error:Error converting bytecode to dex:
Cause: com.android.dex.DexIndexOverflowException: field ID not in [0,0xffff]: 65536

Error:Execution Failed for task ':news-app:transformClassesWithDexForDebugAndroidTest'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_79\bin\java.exe'' finished with non-zero exit value 2

这个例外显然是因为达到了multidex限制.但是我已经为调试版本启用了multi-dex.我想当运行检测测试用例时,它们以调试模式运行.那为什么会发生这种异常呢？

我附加了build.gradle文件

apply plugin: 'com.android.application'
apply plugin: 'io.fabric'


android {
  compileSdkVersion 22
  buildToolsversion 22.0.1

  defaultConfig {
    minSdkVersion 14
    targetSdkVersion 22
    applicationId "com.xyz"
  }


  buildTypes {

    debug {
      minifyEnabled false
      shrinkResources false
      multiDexEnabled true
    }

    release {
      minifyEnabled true
      shrinkResources true
      multiDexEnabled false
    }
  }

  lintOptions {
    warning 'InvalidPackage','GradleCompatible'
  }

  dexOptions {
    preDexLibraries true
    incremental true
    jumboMode = true
    javaMaxHeapSize "4g"
  }


  }
}

}