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Java example source code file (ShortArrayAsListTest.java)

This example Java source code file (ShortArrayAsListTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

gwt, list, listtestsuitebuilder, override, sampleelements, sampleshorts, short, shortsaslistgenerator, shortsaslistheadsublistgenerator, shortsaslistmiddlesublistgenerator, shortsaslisttailsublistgenerator, testlistgenerator, testshortlistgenerator, testsuite, util

The ShortArrayAsListTest.java Java example source code

/*
 * Copyright (C) 2008 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.primitives;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.testing.ListTestSuiteBuilder;
import com.google.common.collect.testing.SampleElements;
import com.google.common.collect.testing.TestListGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.ListFeature;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import java.util.List;

/**
 * Test suite covering {@link Shorts#asList(short[])}.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible(emulated = true)
public class ShortArrayAsListTest extends TestCase {

  private static List<Short> asList(Short[] values) {
    short[] temp = new short[values.length];
    for (short i = 0; i < values.length; i++) {
      temp[i] = checkNotNull(values[i]);  // checkNotNull for GWT (do not optimize).
    }
    return Shorts.asList(temp);
  }

  @GwtIncompatible // suite
  public static Test suite() {
    List<ListTestSuiteBuilder builders =
        ImmutableList.of(
            ListTestSuiteBuilder.using(new ShortsAsListGenerator())
                .named("Shorts.asList"),

            ListTestSuiteBuilder.using(new ShortsAsListHeadSubListGenerator())
                .named("Shorts.asList, head subList"),

            ListTestSuiteBuilder.using(new ShortsAsListTailSubListGenerator())
                .named("Shorts.asList, tail subList"),

            ListTestSuiteBuilder.using(new ShortsAsListMiddleSubListGenerator())
                .named("Shorts.asList, middle subList")
            );

    TestSuite suite = new TestSuite();
    for (ListTestSuiteBuilder<Short> builder : builders) {
      suite.addTest(
          builder
          .withFeatures(CollectionSize.ONE,
                        CollectionSize.SEVERAL,
                        CollectionFeature.RESTRICTS_ELEMENTS,
                        ListFeature.SUPPORTS_SET)
          .createTestSuite());
    }
    return suite;
  }

  // Test generators.  To let the GWT test suite generator access them, they need to be
  // public named classes with a public default constructor.

  public static final class ShortsAsListGenerator extends TestShortListGenerator {
    @Override protected List<Short> create(Short[] elements) {
      return asList(elements);
    }
  }

  public static final class ShortsAsListHeadSubListGenerator extends TestShortListGenerator {
    @Override protected List<Short> create(Short[] elements) {
      Short[] suffix = {Short.MIN_VALUE, Short.MAX_VALUE};
      Short[] all = concat(elements, suffix);
      return asList(all).subList(0, elements.length);
    }
  }

  public static final class ShortsAsListTailSubListGenerator extends TestShortListGenerator {
    @Override protected List<Short> create(Short[] elements) {
      Short[] prefix = {(short) 86, (short) 99};
      Short[] all = concat(prefix, elements);
      return asList(all).subList(2, elements.length + 2);
    }
  }

  public static final class ShortsAsListMiddleSubListGenerator extends TestShortListGenerator {
    @Override protected List<Short> create(Short[] elements) {
      Short[] prefix = {Short.MIN_VALUE, Short.MAX_VALUE};
      Short[] suffix = {(short) 86, (short) 99};
      Short[] all = concat(concat(prefix, elements), suffix);
      return asList(all).subList(2, elements.length + 2);
    }
  }

  private static Short[] concat(Short[] left, Short[] right) {
    Short[] result = new Short[left.length + right.length];
    System.arraycopy(left, 0, result, 0, left.length);
    System.arraycopy(right, 0, result, left.length, right.length);
    return result;
  }

  public static abstract class TestShortListGenerator
      implements TestListGenerator<Short> {
    @Override
    public SampleElements<Short> samples() {
      return new SampleShorts();
    }

    @Override
    public List<Short> create(Object... elements) {
      Short[] array = new Short[elements.length];
      short i = 0;
      for (Object e : elements) {
        array[i++] = (Short) e;
      }
      return create(array);
    }

    /**
     * Creates a new collection containing the given elements; implement this
     * method instead of {@link #create(Object...)}.
     */
    protected abstract List<Short> create(Short[] elements);

    @Override
    public Short[] createArray(int length) {
      return new Short[length];
    }

    /** Returns the original element list, unchanged. */
    @Override
    public List<Short> order(List insertionOrder) {
      return insertionOrder;
    }
  }

  public static class SampleShorts extends SampleElements<Short> {
    public SampleShorts() {
      super((short) 0, (short) 1, (short) 2, (short) 3, (short) 4);
    }
  }
}

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