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  package org.apache.cayenne.crypto.transformer.bytes;
  
  import org.apache.cayenne.crypto.unit.CryptoUnitUtils;
  import org.junit.Test;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertNotNull;
  
  public class GzipDecryptorTest {
  
  	@Test
  	public void testGunzip() throws IOException {
  
  		byte[] input1 = CryptoUnitUtils.hexToBytes("1f8b0800000000000000f348cdc9c957f0409000a91a078c11000000");
  		byte[] output1 = GzipDecryptor.gunzip(input1);
  		byte[] expectedOutput1 = "Hello Hello Hello".getBytes("UTF8");
  
  		assertArrayEquals(expectedOutput1, output1);
  	}
  
  	@Test
  	public void testGunzip_Large() throws IOException {
  
  		byte[] input1 = readResource("plain.gz");
  		byte[] output1 = GzipDecryptor.gunzip(input1);
  		byte[] expectedOutput1 = readResource("plain");
  
  		assertArrayEquals(expectedOutput1, output1);
  	}
  
  	private byte[] readResource(String name) throws IOException {
  
  		ByteArrayOutputStream out = new ByteArrayOutputStream();
  
  		try (InputStream in = getClass().getResourceAsStream(name);) {
  
  			assertNotNull(in);
  			int read;
  			byte[] buffer = new byte[1024];
  			while ((read = in.read(buffer)) > 0) {
  				out.write(buffer, 0, read);
  			}
  		}
  
  		return out.toByteArray();
  	}
  }
  