/*
 * Copyright 2008 Google Inc.
 * 
 * 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.google.gwt.i18n.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.junit.client.GWTTestCase;

/**
 * Tests custom plural rules, including as an inner class.
 * 
 * <p>Captures issue 4175.
 */
public class CustomPluralsTest extends GWTTestCase {

  /**
   * Messages interface with a custom plural rule.
   */
  public interface MyMessages extends Messages {

    /**
     * A custom plural rule that returns "0", "1", or "other".
     */
    public static class CustomPluralRule implements PluralRule {
       @Override
      public PluralForm[] pluralForms() {
          return new PluralForm[] {
             new PluralForm("other", "other"),
             new PluralForm("0", "first"),
             new PluralForm("1", "second")
          };
       }

       @Override
      public int select(int n) {
          if (0 <= n && n <= 1) {
             return n + 1;
          }
          return 0;
       }
    }

    @DefaultMessage("other: {0}")
    @AlternateMessage({"0", "zero", "1", "one"})
    String customPlural(@PluralCount(CustomPluralRule.class) int cnt);
  }

  @Override
  public String getModuleName() {
    return "com.google.gwt.i18n.I18NTest";
  }

  public void testCustomPluralRule() {
    MyMessages m = GWT.create(MyMessages.class);
    assertEquals("zero", m.customPlural(0));
    assertEquals("one", m.customPlural(1));
    assertEquals("other: 2", m.customPlural(2));
  }
}