com.google.eclipse.protobuf.junit/src/com/google/eclipse/protobuf/junit/matchers/EnumHasLiterals.java

/*
 * Copyright (c) 2011 Google Inc.
 *
 * All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse
 * Public License v1.0 which accompanies this distribution, and is available at
 *
 * http://www.eclipse.org/legal/epl-v10.html
 */
package com.google.eclipse.protobuf.junit.matchers;

import java.util.*;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;

import com.google.eclipse.protobuf.protobuf.Enum;
import com.google.eclipse.protobuf.protobuf.Literal;

/**
 * @author alruiz@google.com (Alex Ruiz)
 */
public class EnumHasLiterals extends BaseMatcher<Enum> {

  private final String[] literalNames;

  public static EnumHasLiterals hasLiterals(String... literalNames) {
    return new EnumHasLiterals(literalNames);
  }
  
  private EnumHasLiterals(String... literalNames) {
    this.literalNames = literalNames;
  }
  
  /** {@inheritDoc} */
  public boolean matches(Object arg) {
    if (!(arg instanceof Enum)) return false;
    Enum anEnum = (Enum) arg;
    List<String> actualNames = literalNames(anEnum);
    for (String name : literalNames) actualNames.remove(name);
    return actualNames.isEmpty();
  }

  private List<String> literalNames(Enum anEnum) {
    List<String> names = new ArrayList<String>();
    for (Literal literal : anEnum.getLiterals()) names.add(literal.getName());
    return names;
  }
  
  /** {@inheritDoc} */
  public void describeTo(Description description) {
    description.appendValue(Arrays.toString(literalNames));
  }
}