/*
 * Copyright 2010 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.resources.css;

import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.resources.css.ast.CssStylesheet;
import com.google.gwt.resources.rg.CssTestCase;

import java.util.ArrayList;
import java.util.Arrays;

/**
 * Tests {@link ExternalClassesCollector}.
 */
public class CssExternalTest extends CssTestCase {

  public void testExternal() throws UnableToCompleteException {
    CssStylesheet sheet = GenerateCssAst.exec(TreeLogger.NULL,
        getClass().getClassLoader().getResource(
            "com/google/gwt/resources/css/external.css"));
    assertNotNull(sheet);

    ExternalClassesCollector v = new ExternalClassesCollector();
    v.accept(sheet);

    assertEquals(Arrays.asList("a", "b", "c", "glob-a", "glob-b", "no*effect"),
        new ArrayList<String>(v.getClasses()));
  }

  /**
   * Make sure the short-circuit logic for <code>{@literal @external} *</code> works correctly.
   */
  public void testExternalStar() throws UnableToCompleteException {
    CssStylesheet sheet = GenerateCssAst.exec(TreeLogger.NULL,
        getClass().getClassLoader().getResource(
            "com/google/gwt/resources/css/external_star.css"),
        getClass().getClassLoader().getResource(
            "com/google/gwt/resources/css/external.css"));
    assertNotNull(sheet);

    ExternalClassesCollector v = new ExternalClassesCollector();
    v.accept(sheet);

    assertEquals(Arrays.asList("a", "c", "d", "glob-a", "glob-b", "no-effect"),
        new ArrayList<String>(v.getClasses()));
  }
}