/*
    * 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 Floats#asList(float[])})}.
   *
   * @author Kevin Bourrillion
   */
  @GwtCompatible(emulated = true)
  public class FloatArrayAsListTest extends TestCase {
  
    private static List<Float> asList(Float[] values) {
      float[] temp = new float[values.length];
      for (int i = 0; i < values.length; i++) {
        temp[i] = checkNotNull(values[i]);  // checkNotNull for GWT (do not optimize).
      }
      return Floats.asList(temp);
    }
  
    @GwtIncompatible("suite")
    public static Test suite() {
      List<ListTestSuiteBuilder<Float>> builders =
          ImmutableList.of(
              ListTestSuiteBuilder.using(new FloatsAsListGenerator())
                  .named("Floats.asList"),
  
              ListTestSuiteBuilder.using(new FloatsAsListHeadSubListGenerator())
                  .named("Floats.asList, head subList"),
  
              ListTestSuiteBuilder.using(new FloatsAsListTailSubListGenerator())
                  .named("Floats.asList, tail subList"),
  
              ListTestSuiteBuilder.using(new FloatsAsListMiddleSubListGenerator())
                  .named("Floats.asList, middle subList")
              );
  
      TestSuite suite = new TestSuite();
      for (ListTestSuiteBuilder<Float> 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 FloatsAsListGenerator extends TestFloatListGenerator {
      @Override protected List<Float> create(Float[] elements) {
        return asList(elements);
      }
    }
  
    public static final class FloatsAsListHeadSubListGenerator extends TestFloatListGenerator {
      @Override protected List<Float> create(Float[] elements) {
        Float[] suffix = {Float.MIN_VALUE, Float.MAX_VALUE};
        Float[] all = concat(elements, suffix);
        return asList(all).subList(0, elements.length);
      }
    }
  
   public static final class FloatsAsListTailSubListGenerator extends TestFloatListGenerator {
     @Override protected List<Float> create(Float[] elements) {
       Float[] prefix = {(float) 86, (float) 99};
       Float[] all = concat(prefix, elements);
       return asList(all).subList(2, elements.length + 2);
     }
   }
 
   public static final class FloatsAsListMiddleSubListGenerator extends TestFloatListGenerator {
     @Override protected List<Float> create(Float[] elements) {
       Float[] prefix = {Float.MIN_VALUE, Float.MAX_VALUE};
       Float[] suffix = {(float) 86, (float) 99};
       Float[] all = concat(concat(prefix, elements), suffix);
       return asList(all).subList(2, elements.length + 2);
     }
   }
 
   private static Float[] concat(Float[] left, Float[] right) {
     Float[] result = new Float[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 TestFloatListGenerator
       implements TestListGenerator<Float> {
     @Override
     public SampleElements<Float> samples() {
       return new SampleFloats();
     }
 
     @Override
     public List<Float> create(Object... elements) {
       Float[] array = new Float[elements.length];
       int i = 0;
       for (Object e : elements) {
         array[i++] = (Float) e;
       }
       return create(array);
     }
 
     /**
      * Creates a new collection containing the given elements; implement this
      * method instead of {@link #create(Object...)}.
      */
     protected abstract List<Float> create(Float[] elements);
 
     @Override
     public Float[] createArray(int length) {
       return new Float[length];
     }
 
     /** Returns the original element list, unchanged. */
     @Override
     public List<Float> order(List<Float> insertionOrder) {
       return insertionOrder;
     }
   }
 
   public static class SampleFloats extends SampleElements<Float> {
     public SampleFloats() {
       super((float) 0, (float) 1, (float) 2, (float) 3, (float) 4);
     }
   }
 }