code: /*
   * 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.skywalking.oap.server.library.datacarrier;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import uk.org.webcompere.systemstubs.environment.EnvironmentVariables;
  import uk.org.webcompere.systemstubs.jupiter.SystemStub;
  import uk.org.webcompere.systemstubs.jupiter.SystemStubsExtension;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  @ExtendWith(SystemStubsExtension.class)
  public class EnvUtilTest {
      @SystemStub
      private final EnvironmentVariables environmentVariables = new EnvironmentVariables();
  
      @BeforeEach
      public void before() {
          environmentVariables.set("myInt", "123");
          environmentVariables.set("wrongInt", "wrong123");
          environmentVariables.set("myLong", "12345678901234567");
          environmentVariables.set("wrongLong", "wrong123");
      }
  
      @Test
      public void getInt() {
          assertEquals(123, EnvUtil.getInt("myInt", 234));
          assertEquals(234, EnvUtil.getLong("wrongInt", 234));
      }
  
      @Test
      public void getLong() {
          assertEquals(12345678901234567L, EnvUtil.getLong("myLong", 123L));
          assertEquals(987654321987654321L, EnvUtil.getLong("wrongLong", 987654321987654321L));
      }
  }
  