content: /*******************************************************************************
   * Copyright 2014 Trevor Robinson
   * 
   * 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.scurrilous.circe.impl;
  
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertEquals;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.ArgumentMatchers.eq;
  import static org.mockito.Mockito.atLeast;
  import static org.mockito.Mockito.doAnswer;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.List;
  import org.junit.Test;
  import org.mockito.Mockito;
  
  @SuppressWarnings("javadoc")
  public class AbstractStatefulHashTest {
  
      private AbstractStatefulHash hash;
  
      public AbstractStatefulHashTest() {
          this.hash = mock(AbstractStatefulHash.class, Mockito.CALLS_REAL_METHODS);
      }
  
      @Test
      public void testUpdateByteArray() {
          final byte[] input = new byte[42];
  
          hash.update(input);
  
          verify(hash, times(1))
              .updateUnchecked(eq(input), eq(0), eq(input.length));
      }
  
      @Test
      public void testUpdateByteArrayIntInt() {
          final byte[] input = new byte[42];
  
          hash.update(input, 5, 10);
  
          verify(hash, times(1))
              .updateUnchecked(eq(input), eq(5), eq(10));
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testUpdateByteArrayIntNegInt() {
          final byte[] input = new byte[42];
  
          hash.update(input, 1, -1);
      }
  
      @Test(expected = IndexOutOfBoundsException.class)
      public void testUpdateByteArrayNegIntInt() {
          final byte[] input = new byte[42];
  
          hash.update(input, -1, 10);
      }
  
      @Test(expected = IndexOutOfBoundsException.class)
      public void testUpdateByteArrayIntIntOverflow() {
          final byte[] input = new byte[42];
  
          hash.update(input, 40, 3);
      }
  
      @Test
      public void testUpdateByteBuffer() {
          final ByteBuffer input = ByteBuffer.allocate(20);
          input.position(5);
          input.limit(15);
  
          hash.update(input);
          assertEquals(input.limit(), input.position());
  
          verify(hash, times(1))
              .updateUnchecked(eq(input.array()), eq(input.arrayOffset() + 5), eq(10));
      }
  
      @Test
      public void testUpdateReadOnlyByteBuffer() {
          final ByteBuffer input = ByteBuffer.allocate(20).asReadOnlyBuffer();
          input.position(5);
          input.limit(15);
  
          hash.update(input);
          assertEquals(input.limit(), input.position());
  
          verify(hash, times(1))
              .updateUnchecked(any(byte[].class), eq(0), eq(10));
      }
  
      @Test
      public void testGetBytes() {
          final List<byte[]> captures = new ArrayList<>();
  
          when(hash.length()).thenReturn(5);
  
          doAnswer(invocationOnMock -> {
              captures.add(invocationOnMock.getArgument(0));
              return invocationOnMock.callRealMethod();
          }).when(hash).writeBytes(any(byte[].class), eq(0), eq(5));
  
          hash.getBytes();
          assertEquals(5, captures.get(0).length);
      }
  
      @Test
      public void testGetBytesByteArrayInt() {
          final byte[] output = new byte[5];
  
          when(hash.length()).thenReturn(output.length);
          when(hash.getLong()).thenReturn(0x1234567890L);
  
          hash.getBytes(output, 0, output.length);
          assertArrayEquals(new byte[] { (byte) 0x90, 0x78, 0x56, 0x34, 0x12 }, output);
      }
  
      @Test(expected = IndexOutOfBoundsException.class)
      public void testGetBytesByteArrayNegInt() {
          final byte[] output = new byte[5];
  
          when(hash.length()).thenReturn(output.length);
  
          hash.getBytes(output, -1, output.length);
  
          verify(hash, atLeast(0)).length();
      }
  
      @Test(expected = IndexOutOfBoundsException.class)
      public void testGetBytesByteArrayIntOverflow() {
          final byte[] output = new byte[5];
  
          hash.getBytes(output, 0, output.length + 1);
      }
  
      @Test
      public void testGetBytesByteArrayIntPartial() {
          final byte[] output = new byte[5];
  
          when(hash.length()).thenReturn(output.length + 1);
  
          hash.getBytes(output, 0, output.length);
  
          verify(hash, times(1)).writeBytes(eq(output), eq(0), eq(output.length));
      }
  
      @Test
      public void testGetByte() {
          when(hash.getInt()).thenReturn(0x12345678);
  
          assertEquals(0x78, hash.getByte());
      }
  
      @Test
      public void testGetShort() {
          when(hash.getInt()).thenReturn(0x12345678);
  
          assertEquals(0x5678, hash.getShort());
      }
  }
  