/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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 com.intellij.ide.plugins;

import com.intellij.openapi.updateSettings.impl.PluginDownloader;
import com.intellij.openapi.util.text.StringUtil;
import junit.framework.TestCase;

public class VersionCompareTest extends TestCase {
  private static int compareVersions(String v1, String v2) {
    return PluginDownloader.comparePluginVersions(v1, v2);
  }

  public static void ascending(String... versions) {
    assertTrue(versions.length > 1);
    for (int i = 0; i < versions.length - 1; i++) {
      assertTrue(versions[i] + " is greater then " + versions[i + 1],
                 compareVersions(versions[i], versions[i + 1]) < 0);
    }
  }

  public void testEqual() {
    String v1 = "0.0.1";
    String v2 = "0.0.1";

    assertTrue("Version is not equal", compareVersions(v1, v2) == 0);
  }

  public void testGreat() {
    String v1 = "0.0.2";
    String v2 = "0.0.1";

    assertTrue("Version 1 is not great than Version 2",
               compareVersions(v1, v2) > 0);
  }

  public void testLess() {
    String v1 = "0.0.1";
    String v2 = "0.0.2";

    assertTrue("Version 1 is not less than Version 2",
               compareVersions(v1, v2) < 0);
  }

  public void testGreatDiff() {
    String v1 = "0.0.2.0";
    String v2 = "0.0.1.0";

    assertTrue("Version 1 is not great than Version 2",
               compareVersions(v1, v2) > 0);
  }

  public void testLessDiff() {
    String v1 = "0.0.1.1";
    String v2 = "0.0.2.0";

    assertTrue("Version 1 is not less than Version 2",
               compareVersions(v1, v2) < 0);
  }

  public void testDifferentNumberOfParts() {
    assertEquals(0, compareVersions("1.0.0", "1.0"));
    assertEquals(0, compareVersions("1.0.0", "1"));

    assertEquals(0, compareVersions("1.0.0", "1.0."));
    assertEquals(0, compareVersions("1.0.0", "1."));

    assertEquals(0, compareVersions("1.0.", "1.0.0"));
    assertEquals(0, compareVersions("1.", "1.0.0"));

    assertEquals(0, compareVersions("1.0", "1.0.0"));
    assertEquals(0, compareVersions("1", "1.0.0"));

    assertEquals(1, compareVersions("1.0.1", "1.0"));
    assertEquals(1, compareVersions("1.0.1", "1"));
    assertEquals(-1, compareVersions("1.0", "1.0.1"));
    assertEquals(-1, compareVersions("1", "1.0.1"));

    assertTrue(compareVersions("1.0.00", "1.0") == 0);
    assertTrue(compareVersions("1.0.01", "1") > 0);
  }

  public void testWord() {
    String v1 = "0.0.1a";
    String v2 = "0.0.2";

    assertTrue("Version 1 is not less than Version 2",
               compareVersions(v1, v2) < 0);
  }

  public void testNewest() {
    String serverVer = "1.0.10";
    String userVer = "1.0.9";

    assertTrue("Server version is not great than user version",
               compareVersions(serverVer, userVer) > 0);
  }

  public void testJira() {
    assertTrue(compareVersions("3.6.2", "3.7") < 0);
    assertTrue(compareVersions("3.7.1", "3.13.4") < 0);
  }

  /**
   * See http://semver.org/
   */
  public void testSemver() {
    ascending("0.1.2", "0.1.11", "0.1.11-2", "1.0.0-alpha", "1.0.0-alpha.1", "1.0.0-beta",
              "1.0.0-beta.2", "1.0.0-beta.11", "1.0.0-rc.1", "1.0.0");
  }

  // Some real world examples from IDEA plugin repository

  public void testPythonPlugin() {
    ascending("3.1 Beta", "3.1 Beta 2", "3.1", "3.1.1.134.1462", "3.4.Beta.135.1",
              "3.4.135.21", "4.0 Beta 139.3", "4.0 Beta 139.58", "4.0.12",
              "4.1 141.4 EAP", "4.1 141.39 EAP", "4.5 141.82"
    );
    ascending("4.1", "142.175 v4.5", "142.175 v4.5.1");
  }

  public void testRubyPlugin() {
    assertTrue(compareVersions("7.1.0.20150520", "7.1.0.20150501") > 0);
  }

  public void testScalaPlugin() {
    assertTrue(compareVersions("1.3.3.16-14.1", "1.3.3.15-14.1") > 0);
  }

  public void testBashPlugin() {
    assertTrue(compareVersions("1.1beta16", "1.1beta8") > 0);
    assertTrue(compareVersions("1.5.0.142-beta2", "1.5.0.142-beta1") > 0);
  }
}