code: /**
   * Copyright 2018 Alexey Ragozin
   *
   * Licensed 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.gridkit.jvmtool;
  
  import java.lang.management.ManagementFactory;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class JStackDumpParserTest {
  
      private static String PID;
      static {
          PID = ManagementFactory.getRuntimeMXBean().getName();
          PID = PID.substring(0, PID.indexOf('@'));
      }
  
      @Test
      public void ssa_jstack_dump_histo() {
          exec("ssa", "--histo", "-f", "src/test/resources/jstack.txt", "-X");
      }
  
      private void exec(String... cmd) {
          SJK sjk = new SJK();
          sjk.suppressSystemExit();
          StringBuilder sb = new StringBuilder();
          sb.append("SJK");
          for(String c: cmd) {
              sb.append(' ').append(escape(c));
          }
          System.out.println(sb);
          Assert.assertTrue(sjk.start(cmd));
      }
  
      @SuppressWarnings("unused")
      private void fail(String... cmd) {
          SJK sjk = new SJK();
          sjk.suppressSystemExit();
          StringBuilder sb = new StringBuilder();
          sb.append("SJK");
          for(String c: cmd) {
              sb.append(' ').append(escape(c));
          }
          System.out.println(sb);
          Assert.assertFalse(sjk.start(cmd));
      }
  
      private Object escape(String c) {
          if (c.split("\\s").length > 1) {
              return '\"' + c + '\"';
          }
          else {
              return c;
          }
      }
  }
  