// Copyright (C) 2004 - 2011 Philip Aston
   // All rights reserved.
   //
   // This file is part of The Grinder software distribution. Refer to
   // the file LICENSE which is part of The Grinder distribution for
   // licensing details. The Grinder distribution is available on the
   // Internet at http://grinder.sourceforge.net/
   //
   // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  // OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package net.grinder.util;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  import static org.mockito.Matchers.contains;
  import static org.mockito.Matchers.isA;
  import static org.mockito.Matchers.same;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  
  import org.junit.Test;
  import org.slf4j.Logger;
  
  
  /**
   * Unit test case for {@link JVM}.
   *
   * @author Philip Aston
   */
  public class TestJVM {
  
    @Test public void testIsAtLeastVersion() throws Exception {
      final JVM jvm = JVM.getInstance();
  
      assertTrue(jvm.isAtLeastVersion(1, 1));
      assertTrue(jvm.isAtLeastVersion(1, 2));
      assertTrue(jvm.isAtLeastVersion(1, 3));
  
      assertFalse(jvm.isAtLeastVersion(3, 0));
      assertFalse(jvm.isAtLeastVersion(1, 9));
  
      final String[] badVersions = {
        "not parseable",
        "123123",
        "",
      };
  
      final String oldVersion = System.getProperty("java.version");
  
      try {
        for (int i = 0; i < badVersions.length; ++i) {
          System.setProperty("java.version", badVersions[i]);
  
          try {
            jvm.isAtLeastVersion(1, 3);
            fail("Expected JVM.VersionException");
          }
          catch (JVM.VersionException e) {
          }
        }
      }
      finally {
        System.setProperty("java.version", oldVersion);
      }
    }
  
    @Test public void testHaveRequisites() throws Exception {
      final Logger logger = mock(Logger.class);
      final JVM jvm = JVM.getInstance();
  
      assertTrue(jvm.haveRequisites(logger));
      verifyNoMoreInteractions(logger);
  
      final String oldVersion = System.getProperty("java.version");
  
      try {
        System.setProperty("java.version", "1.2");
  
        assertFalse(jvm.haveRequisites(logger));
        verify(logger).error(contains("incompatible version"),
                             same(jvm),
                             isA(String.class));
      }
      finally {
        System.setProperty("java.version", oldVersion);
      }
   }
 
   @Test public void testToString() throws Exception {
     final String result = JVM.getInstance().toString();
 
     assertTrue(result.indexOf(System.getProperty("java.vm.version")) > 0);
     assertTrue(result.indexOf(System.getProperty("os.version")) > 0);
   }
 }