hadoop-hdds/common/src/test/java/org/apache/hadoop/hdds/tracing/TestStringCodec.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hdds.tracing;

import io.jaegertracing.internal.JaegerSpanContext;
import io.jaegertracing.internal.exceptions.EmptyTracerStateStringException;
import io.jaegertracing.internal.exceptions.MalformedTracerStateStringException;
import org.apache.hadoop.test.LambdaTestUtils;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertTrue;

class TestStringCodec {

  @Test
  void testExtract() throws Exception {
    StringCodec codec = new StringCodec();

    LambdaTestUtils.intercept(EmptyTracerStateStringException.class,
        () -> codec.extract(null));

    StringBuilder sb = new StringBuilder().append("123");
    LambdaTestUtils.intercept(MalformedTracerStateStringException.class,
        "String does not match tracer state format",
        () -> codec.extract(sb));

    sb.append(":456:789");
    LambdaTestUtils.intercept(MalformedTracerStateStringException.class,
        "String does not match tracer state format",
        () -> codec.extract(sb));
    sb.append(":66");
    JaegerSpanContext context = codec.extract(sb);
    String expectedContextString = new String("123:456:789:66");
    assertTrue(context.getTraceId().equals("123"));
    assertTrue(context.toString().equals(expectedContextString));
  }
}