com.google.common.collect.testing.google.AbstractBiMapTester Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of guava-testlib Show documentation

Guava testlib is a set of java classes used for more convenient unit testing - particularly to assist the tests for Guava itself.

There is a newer version: 33.2.0-jre

Show newest version

/*
 * Copyright (C) 2012 The Guava Authors
 *
 * 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.common.collect.testing.google;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.BiMap;
import com.google.common.collect.testing.AbstractMapTester;
import com.google.common.collect.testing.Helpers;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map.Entry;
import org.junit.Ignore;

/** Skeleton for a tester of a {@code BiMap}. */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public abstract class AbstractBiMapTester extends AbstractMapTester {

  @Override
  protected BiMap getMap() {
    return (BiMap) super.getMap();
  }

  static  Entry reverseEntry(Entry entry) {
    return Helpers.mapEntry(entry.getValue(), entry.getKey());
  }

  @Override
  protected void expectContents(Collection> expected) {
    super.expectContents(expected);
    List> reversedEntries = new ArrayList<>();
    for (Entry entry : expected) {
      reversedEntries.add(reverseEntry(entry));
    }
    Helpers.assertEqualIgnoringOrder(getMap().inverse().entrySet(), reversedEntries);

    for (Entry entry : expected) {
      assertEquals(
          "Wrong key for value " + entry.getValue(),
          entry.getKey(),
          getMap().inverse().get(entry.getValue()));
    }
  }

  @Override
  protected void expectMissing(Entry... entries) {
    super.expectMissing(entries);
    for (Entry entry : entries) {
      Entry reversed = reverseEntry(entry);
      BiMap inv = getMap().inverse();
      assertFalse(
          "Inverse should not contain entry " + reversed, inv.entrySet().contains(reversed));
      assertFalse(
          "Inverse should not contain key " + reversed.getKey(),
          inv.containsKey(reversed.getKey()));
      assertFalse(
          "Inverse should not contain value " + reversed.getValue(),
          inv.containsValue(reversed.getValue()));
      /*
       * TODO(cpovirk): This is a bit stronger than super.expectMissing(), which permits a  pair.
       */
      assertNull(
          "Inverse should not return a mapping for key " + reversed.getKey(),
          inv.get(reversed.getKey()));
    }
  }
}