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23 
24 /**
25  * @test
26  * @bug 8187898
27  * @summary Test of writeBytes(byte[])
28  */
29 package test.java.io.PrintStream;
30 
31 import java.io.BufferedOutputStream;
32 import java.io.ByteArrayOutputStream;
33 import java.io.OutputStream;
34 import java.io.PrintStream;
35 import java.util.Arrays;
36 
37 import org.testng.annotations.Test;
38 import static org.testng.Assert.assertEquals;
39 import static org.testng.Assert.assertTrue;
40 
41 public class WriteBytes {
42 
43     @Test
testWriteBytes()44     public void testWriteBytes() {
45         ByteArrayOutputStream baos = new ByteArrayOutputStream();
46         OutputStream out = new BufferedOutputStream(baos, 512);
47         PrintStream ps = new PrintStream(out, false);
48 
49         byte[] buf = new byte[128];
50         for (int i = 0; i < buf.length; i++) {
51             buf[i] = (byte)i;
52         }
53 
54         ps.writeBytes(buf);
55         assertEquals(baos.size(), 0, "Buffer should not have been flushed");
56         ps.close();
57         assertEquals(baos.size(), buf.length, "Stream size " + baos.size() +
58             " but expected " + buf.length);
59 
60         ps = new PrintStream(out, true);
61         ps.writeBytes(buf);
62         assertEquals(baos.size(), 2*buf.length, "Stream size " + baos.size() +
63             " but expected " + 2*buf.length);
64 
65         byte[] arr = baos.toByteArray();
66         assertEquals(arr.length, 2*buf.length, "Array length " + arr.length +
67             " but expected " + 2*buf.length);
68         assertTrue(Arrays.equals(buf, 0, buf.length, arr, 0, buf.length),
69             "First write not equal");
70         assertTrue(Arrays.equals(buf, 0, buf.length, arr, buf.length,
71             2*buf.length), "Second write not equal");
72 
73         ps.close();
74         ps.writeBytes(buf);
75         assertTrue(ps.checkError(), "Error condition should be true");
76     }
77 
78 }
79