/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.test.type.descriptor.java;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.io.IOException;
import java.sql.Blob;
import java.sql.SQLException;

import org.hibernate.engine.jdbc.BlobImplementer;
import org.hibernate.engine.jdbc.BlobProxy;
import org.hibernate.testing.TestForIssue;
import org.hibernate.type.descriptor.java.BlobTypeDescriptor;
import org.hibernate.type.descriptor.java.DataHelper;
import org.hibernate.type.descriptor.java.PrimitiveByteArrayTypeDescriptor;
import org.junit.Test;

/**
 * @author Steve Ebersole
 */
public class BlobDescriptorTest extends AbstractDescriptorTest<Blob> {
	final Blob original = BlobProxy.generateProxy( new byte[] { 1, 2, 3 } );
	final Blob copy = BlobProxy.generateProxy( new byte[] { 1, 2, 3 } );
	final Blob different = BlobProxy.generateProxy( new byte[] { 3, 2, 1 } );

	public BlobDescriptorTest() {
		super( BlobTypeDescriptor.INSTANCE );
	}

	@Override
	protected Data<Blob> getTestData() {
		return new Data<Blob>( original, copy, different );
	}

	@Override
	protected boolean shouldBeMutable() {
		return false;
	}

	@Test
	@Override
	public void testEquality() {
		// blobs of the same internal value are not really comparable
		assertFalse( original == copy );
		assertTrue( BlobTypeDescriptor.INSTANCE.areEqual( original, original ) );
		assertFalse( BlobTypeDescriptor.INSTANCE.areEqual( original, copy ) );
		assertFalse( BlobTypeDescriptor.INSTANCE.areEqual( original, different ) );
	}

	@Test
	@Override
	public void testExternalization() {
		// blobs of the same internal value are not really comparable
		String externalized = BlobTypeDescriptor.INSTANCE.toString( original );
		Blob consumed = BlobTypeDescriptor.INSTANCE.fromString( externalized );
		try {
			PrimitiveByteArrayTypeDescriptor.INSTANCE.areEqual(
					DataHelper.extractBytes( original.getBinaryStream() ),
					DataHelper.extractBytes( consumed.getBinaryStream() )
			);
		}
		catch ( SQLException e ) {
			fail( "SQLException accessing blob : " + e.getMessage() );
		}
	}

	@Test
	@TestForIssue( jiraKey = "HHH-8193" )
	public void testStreamResetOnAccess() throws IOException {
		byte[] bytes = new byte[] { 1, 2, 3, 4 };
		BlobImplementer blob = (BlobImplementer) BlobProxy.generateProxy( bytes );
		int value = blob.getUnderlyingStream().getInputStream().read();
		// Call to BlobImplementer#getUnderlyingStream() should mark input stream for reset.
		assertEquals( bytes.length, blob.getUnderlyingStream().getInputStream().available() );
	}
}