ECDSA sign error

[superzoeyian]

my test code is like this :
@test
public void loadTest() {
String privString = "c85ef7d79691fe79573b1a7064c19c1a9819ebdbd1faaab1a8ec92344438aaf4";
BigInteger privateKey = new BigInteger(privString, 16);
String exampleMessage = "This is an example of a signed message.";
ECKey key = ECKey.fromPrivate(privateKey);
byte[] messageHash = HashUtil.sha3(exampleMessage.getBytes());
ECDSASignature signature = key.sign(messageHash);
String output = signature.toHex();
System.out.println("Signature\t: " + output + " (Hex, length: " + output.length() + ")");
}

and i got tests failed msg below:

java.lang.NoClassDefFoundError: org/spongycastle/asn1/rosstandart/RosstandartObjectIdentifiers

at org.spongycastle.jcajce.provider.digest.GOST3411$Mappings.configure(GOST3411.java:170)
at org.spongycastle.jce.provider.BouncyCastleProvider.loadAlgorithms(BouncyCastleProvider.java:225)
at org.spongycastle.jce.provider.BouncyCastleProvider.setup(BouncyCastleProvider.java:154)
at org.spongycastle.jce.provider.BouncyCastleProvider.access$000(BouncyCastleProvider.java:54)
at org.spongycastle.jce.provider.BouncyCastleProvider$1.run(BouncyCastleProvider.java:146)
at java.security.AccessController.doPrivileged(Native Method)
at org.spongycastle.jce.provider.BouncyCastleProvider.<init>(BouncyCastleProvider.java:142)
at org.ethereum.crypto.jce.SpongyCastleProvider$Holder.<clinit>(SpongyCastleProvider.java:33)
at org.ethereum.crypto.jce.SpongyCastleProvider.getInstance(SpongyCastleProvider.java:41)
at org.ethereum.crypto.ECKey.<init>(ECKey.java:276)
at org.ethereum.crypto.ECKey.fromPrivate(ECKey.java:317)
at org.ethereum.crypto.ECKey.<clinit>(ECKey.java:141)
at IIDUtilTest.loadTest(IIDUtilTest.java:175)
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.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$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)

could someone help me out with this error,

[erockoms]

这是来自QQ邮箱的假期自动回复邮件。您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。