VersionTest.java

/*
 * Copyright (C) 2011 Laurent Caillette
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.novelang;

import org.junit.Test;
import static org.junit.Assert.*;

/**
 * Tests for the {@link Version} class.
 * 
 * @author Laurent Caillette
 */
public class VersionTest {
  
  @Test
  public void defaultsForSnapshot() {
    final Version snapshot = Version.SNAPSHOT ;
    assertTrue( snapshot.isSnapshot() ) ;
    assertEquals( "SNAPSHOT", snapshot.getName() ) ;
  }
  
  @Test
  public void parseSnapshot() throws VersionFormatException {
    assertTrue( Version.parse( "${" + "project.version}" ).isSnapshot() ) ;
    assertTrue( Version.parse( "SNAPSHOT" ).isSnapshot() ) ;
    assertTrue( Version.parse( Version.SNAPSHOT.getName() ).isSnapshot() ) ;
  }
  
  @Test
  public void parse0_1_23() throws VersionFormatException {
    final Version version = Version.parse( "0.1.23" ) ;
    assertFalse( version.isSnapshot() ) ;
    assertEquals(  0, version.getMajor() ) ;
    assertEquals(  1, version.getMinor() ) ;
    assertEquals( 23, version.getFix() ) ;
    assertEquals( "0.1.23", version.getName() ) ;
  }
  
  @Test
  public void normalNumberedVersion() {
    final Version version = new Version( 0, 12, 3 ) ;
    assertFalse( version.isSnapshot() ) ;
    assertEquals( 0, version.getMajor() ) ;
    assertEquals( 12, version.getMinor() ) ;
    assertEquals( 3, version.getFix() ) ;
  }
  
  @Test( expected = VersionFormatException.class )
  public void rejectUnparseableString() throws VersionFormatException {
    Version.parse( "0" ) ;
  }
  
  @Test( expected = IllegalArgumentException.class )
  public void rejectWrongMajorNumber() throws VersionFormatException {
    new Version( -1, 2, 3 ) ;
  }
  
  @Test( expected = IllegalArgumentException.class )
  public void rejectWrongMinorNumber() throws VersionFormatException {
    new Version( 1, -2, 3 ) ;
  }
  
  @Test( expected = IllegalArgumentException.class )
  public void rejectWrongFixNumber() throws VersionFormatException {
    new Version( 1, 2, -3 ) ;
  }
  
  @Test( expected = IllegalStateException.class )
  public void noMajorNumberForSnapshot() {
    Version.SNAPSHOT.getMajor() ;
  }
  
  @Test( expected = IllegalStateException.class )
  public void noMinorNumberForSnapshot() {
    Version.SNAPSHOT.getMinor() ;
  }
  
  @Test( expected = IllegalStateException.class )
  public void noFixNumberForSnapshot() {
    Version.SNAPSHOT.getFix() ;
  }
  
  @Test
  public void compare() {
    final Version vSnapshotA = Version.SNAPSHOT ;
    final Version v3_1_1 = new Version( 3, 1, 1 ) ;
    final Version v3_1_1b = new Version( 3, 1, 1 ) ;
    final Version v2_3_1 = new Version( 2, 3, 1 ) ;
    final Version v2_1_3 = new Version( 2, 1, 3 ) ;
    final Version v1_3_3 = new Version( 1, 3, 3 ) ;
    final Version v1_3_4 = new Version( 1, 3, 4 ) ;
    
    compare(  0, null,       null ) ;
    
    compare( -1, null,       vSnapshotA ) ;
    compare(  1, vSnapshotA, null ) ;
    
    compare(  0, vSnapshotA, vSnapshotA ) ;
    compare(  0, v3_1_1,     v3_1_1b ) ;
    compare(  0, v3_1_1,     v3_1_1b ) ;
    compare(  0, v3_1_1b,    v3_1_1 ) ;

    compare(  1, vSnapshotA, v1_3_3 ) ;
    compare( -1, v1_3_3,     vSnapshotA ) ;
   
    compare( -1, v2_3_1, v3_1_1 ) ;
    compare(  1, v3_1_1, v2_3_1 ) ;
    
    compare( -1, v2_1_3, v2_3_1 ) ;
    compare(  1, v2_3_1, v2_1_3 ) ;
    
    compare( -1, v1_3_3, v1_3_4 ) ;
    compare(  1, v1_3_4, v1_3_3 ) ;
  }
  
// =======  
// Fixture  
// =======
  
  private static void compare( 
      final int expected, 
      final Version version1, 
      final Version version2 
  ) {
    if( expected == 0 ) {
      assertEquals( expected, Version.COMPARATOR.compare( version1, version2 ) ) ;
    } else {
      final int result =  Version.COMPARATOR.compare( version1, version2 ) ;
      if( expected < 0 ) {
        assertTrue( "Got " + result, result < 0 ) ;
      } else {
        assertTrue( "Got " + result, result > 0 ) ;
      }
    }
  }

}