Error when using mockSchemaregistry

[chinchu chinchu]

Hey folks,
I am  getting the below exception when using a mockSchemaRegsitry in a
junit test . I appreciate your help.I am  using confluent 4.0


  private  SchemaRegistryClient schemaRegistry;
  private  KafkaAvroSerializer avroSerializer;

Properties defaultConfig = new Properties();
defaultConfig.put(KafkaAvroDeserializerConfig.SCHEMA_REGISTRY_URL_CONFIG, "
http://fake-url";);
defaultConfig.put("auto.register.schemas", false);
    schemaRegistry = new MockSchemaRegistryClient();
    avroSerializer = new KafkaAvroSerializer(schemaRegistry, new
HashMap(defaultConfig));
 Map<String, Object> senderProps  =
KafkaTestUtils.producerProps(embeddedKafka);
senderProps.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
StringSerializer.class);
senderProps.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,avroSerializer.getClass());
KafkaProducer<String, Log> producer = new
KafkaProducer<String,Log>(senderProps);
ProducerRecord<String,Log> record =new
ProducerRecord<String,Log>("test2","1",log);
try {
producer.send(record).get();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Error
==============
org.apache.kafka.common.KafkaException: Failed to construct kafka producer
at
org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:441)
at
org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:268)
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.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
Caused by: io.confluent.common.config.ConfigException: Missing required
configuration "schema.registry.url" which has no default value.
at io.confluent.common.config.ConfigDef.parse(ConfigDef.java:243)
at io.confluent.common.config.AbstractConfig.<init>(AbstractConfig.java:78)
at
io.confluent.kafka.serializers.AbstractKafkaAvroSerDeConfig.<init>(AbstractKafkaAvroSerDeConfig.java:61)
at
io.confluent.kafka.serializers.KafkaAvroSerializerConfig.<init>(KafkaAvroSerializerConfig.java:32)
at
io.confluent.kafka.serializers.KafkaAvroSerializer.configure(KafkaAvroSerializer.java:48)
at
org.apache.kafka.common.serialization.ExtendedSerializer$Wrapper.configure(ExtendedSerializer.java:60)
at
org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:360)
... 28 more