/*
    * 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.reflect;
  
  import static com.google.common.truth.Truth.assertThat;
  
  import com.google.common.collect.ImmutableList;
  import com.google.common.collect.Maps;
  import com.google.common.collect.testing.MapTestSuiteBuilder;
  import com.google.common.collect.testing.SampleElements;
  import com.google.common.collect.testing.TestMapGenerator;
  import com.google.common.collect.testing.features.CollectionFeature;
  import com.google.common.collect.testing.features.CollectionSize;
  import com.google.common.collect.testing.features.MapFeature;
  
  import junit.framework.Test;
  import junit.framework.TestCase;
  import junit.framework.TestSuite;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  
  /**
   * Unit test for {@link ImmutableTypeToInstanceMap}.
   *
   * @author Ben Yu
   */
  public class ImmutableTypeToInstanceMapTest extends TestCase {
  
    public static Test suite() {
      TestSuite suite = new TestSuite();
      suite.addTestSuite(ImmutableTypeToInstanceMapTest.class);
  
      suite.addTest(MapTestSuiteBuilder
          .using(new TestTypeToInstanceMapGenerator() {
            // Other tests will verify what real, warning-free usage looks like
            // but here we have to do some serious fudging
            @Override
            @SuppressWarnings("unchecked")
            public Map<TypeToken, Object> create(Object... elements) {
              ImmutableTypeToInstanceMap.Builder<Object> builder
                  = ImmutableTypeToInstanceMap.builder();
              for (Object object : elements) {
                Entry<TypeToken, Object> entry = (Entry<TypeToken, Object>) object;
                builder.put(entry.getKey(), entry.getValue());
              }
              return (Map) builder.build();
            }
          })
          .named("ImmutableTypeToInstanceMap")
          .withFeatures(
              MapFeature.REJECTS_DUPLICATES_AT_CREATION,
              MapFeature.RESTRICTS_KEYS,
              CollectionFeature.KNOWN_ORDER,
              CollectionSize.ANY,
              MapFeature.ALLOWS_ANY_NULL_QUERIES)
          .createTestSuite());
  
      return suite;
    }
  
    public void testEmpty() {
      assertEquals(0, ImmutableTypeToInstanceMap.of().size());
    }
  
    public void testPrimitiveAndWrapper() {
      ImmutableTypeToInstanceMap<Number> map = ImmutableTypeToInstanceMap.<Number>builder()
          .put(Integer.class, 0)
          .put(int.class, 1)
          .build();
      assertEquals(2, map.size());
  
      assertEquals(0, (int) map.getInstance(Integer.class));
      assertEquals(0, (int) map.getInstance(TypeToken.of(Integer.class)));
      assertEquals(1, (int) map.getInstance(int.class));
      assertEquals(1, (int) map.getInstance(TypeToken.of(int.class)));
    }
  
    public void testParameterizedType() {
      TypeToken<ImmutableList<Integer>> type = new TypeToken<ImmutableList<Integer>>() {};
      ImmutableTypeToInstanceMap<Iterable<?>> map = ImmutableTypeToInstanceMap.<Iterable<?>>builder()
          .put(type, ImmutableList.of(1))
          .build();
      assertEquals(1, map.size());
     assertEquals(ImmutableList.of(1), map.getInstance(type));
   }
 
   public void testGeneriArrayType() {
     @SuppressWarnings("unchecked") // Trying to test generic array
     ImmutableList<Integer>[] array = new ImmutableList[] {ImmutableList.of(1)};
     TypeToken<ImmutableList<Integer>[]> type = new TypeToken<ImmutableList<Integer>[]>() {};
     ImmutableTypeToInstanceMap<Iterable<?>[]> map =
         ImmutableTypeToInstanceMap.<Iterable<?>[]>builder()
             .put(type, array)
             .build();
     assertEquals(1, map.size());
     assertThat(map.getInstance(type)).asList().has().exactly(array[0]).inOrder();
   }
 
   public void testWildcardType() {
     TypeToken<ImmutableList<?>> type = new TypeToken<ImmutableList<?>>() {};
     ImmutableTypeToInstanceMap<Iterable<?>> map = ImmutableTypeToInstanceMap.<Iterable<?>>builder()
             .put(type, ImmutableList.of(1))
             .build();
     assertEquals(1, map.size());
     assertEquals(ImmutableList.of(1), map.getInstance(type));
   }
 
   public void testGetInstance_containsTypeVariable() {
     ImmutableTypeToInstanceMap<Iterable<Number>> map = ImmutableTypeToInstanceMap.of();
     try {
       map.getInstance(this.<Number>anyIterableType());
       fail();
     } catch (IllegalArgumentException expected) {}
   }
 
   public void testPut_containsTypeVariable() {
     ImmutableTypeToInstanceMap.Builder<Iterable<Integer>> builder =
         ImmutableTypeToInstanceMap.builder();
     try {
       builder.put(this.<Integer>anyIterableType(), ImmutableList.of(1));
       fail();
     } catch (IllegalArgumentException expected) {}
   }
 
   private <T> TypeToken<Iterable<T>> anyIterableType() {
     return new TypeToken<Iterable<T>>() {};
   }
 
   abstract static class TestTypeToInstanceMapGenerator
       implements TestMapGenerator<TypeToken, Object> {
 
     @Override public TypeToken[] createKeyArray(int length) {
       return new TypeToken[length];
     }
 
     @Override public Object[] createValueArray(int length) {
       return new Object[length];
     }
 
     @Override
     public SampleElements<Entry<TypeToken, Object>> samples() {
       Entry<TypeToken, Object> entry1 =
           Maps.immutableEntry((TypeToken) TypeToken.of(Integer.class), (Object) 0);
       Entry<TypeToken, Object> entry2 =
           Maps.immutableEntry((TypeToken) TypeToken.of(Number.class), (Object) 1);
       Entry<TypeToken, Object> entry3 =
           Maps.immutableEntry((TypeToken) new TypeToken<ImmutableList<Integer>>() {},
               (Object) ImmutableList.of(2));
       Entry<TypeToken, Object> entry4 =
           Maps.immutableEntry((TypeToken) new TypeToken<int[]>() {}, (Object) new int[] {3});
       Entry<TypeToken, Object> entry5 =
           Maps.immutableEntry((TypeToken) new TypeToken<Iterable<?>>() {},
               (Object) ImmutableList.of("4"));
       return new SampleElements<Entry<TypeToken, Object>>(
           entry1, entry2, entry3, entry4, entry5
       );
     }
 
     @Override
     @SuppressWarnings("unchecked")
     public Entry<TypeToken, Object>[] createArray(int length) {
       return new Entry[length];
     }
 
     @Override
     public Iterable<Entry<TypeToken, Object>> order(List<Entry<TypeToken, Object>> insertionOrder) {
       return insertionOrder;
     }
   }
 }