@Test
public void testCopy() {
AsciiInputStream in = new AsciiInputStream("input");
StringOutputStream out = new StringOutputStream();
try {
StreamUtil.copy(in, out);
} catch (IOException ioex) {
fail("StreamUtil.copy " + ioex.toString());
}
assertEquals("input", out.toString());
StreamUtil.close(out);
StreamUtil.close(in);
}
@Test
public void testCompare() {
try {
File file = new File(dataRoot, "file/a.txt");
FileInputStream in1 = new FileInputStream(file);
String content = "test file\r\n";
if (file.length() == 10) {
content = StringUtil.remove(content, '\r');
}
AsciiInputStream in2 = new AsciiInputStream(content);
assertTrue(StreamUtil.compare(in1, in2));
StreamUtil.close(in2);
StreamUtil.close(in1);
} catch (FileNotFoundException e) {
fail("StreamUtil.testCloneCompare " + e.toString());
} catch (IOException e) {
fail("StreamUtil.testCloneCompare " + e.toString());
}
}
/** Verify that using a ByteArrayInputStream does not allocate a new byte array. */
@Test
public void testByteArrayInputStream() throws Exception {
byte[] bytes = new byte[8];
InputStream input = new ByteArrayInputStream(bytes);
try {
byte[] bytesRead = StreamUtil.getBytesFromStream(input);
assertTrue(Arrays.equals(bytes, bytesRead));
} finally {
Closeables.close(input, true);
}
}
/** Verify that using an offset with ByteArrayInputStream still produces correct output. */
@Test
public void testByteArrayInputStreamWithOffset() throws Exception {
byte[] bytes = new byte[] {0, 1, 2, 3, 4};
InputStream input = new ByteArrayInputStream(bytes, 1, 4);
try {
byte[] bytesRead = StreamUtil.getBytesFromStream(input);
byte[] expectedBytes = new byte[] {1, 2, 3, 4};
assertTrue(Arrays.equals(expectedBytes, bytesRead));
} finally {
Closeables.close(input, true);
}
}
@Test
public void testGetBytes() {
try {
FileInputStream in = new FileInputStream(new File(dataRoot, "file/a.txt"));
byte[] data = StreamUtil.readBytes(in);
StreamUtil.close(in);
String s = new String(data);
s = StringUtil.remove(s, '\r');
assertEquals("test file\n", s);
in = new FileInputStream(new File(dataRoot, "file/a.txt"));
String str = new String(StreamUtil.readChars(in));
StreamUtil.close(in);
str = StringUtil.remove(str, '\r');
assertEquals("test file\n", str);
} catch (FileNotFoundException e) {
fail("StreamUtil.testGetBytes " + e.toString());
} catch (IOException e) {
fail("StreamUtil.testGetBytes " + e.toString());
}
}
@Test
public void testSuccessfulSkip() throws Exception {
InputStream inputStream = mock(InputStream.class);
when(inputStream.skip(anyLong())).thenReturn(2L);
assertEquals(10, StreamUtil.skip(inputStream, 10));
InOrder order = inOrder(inputStream);
order.verify(inputStream).skip(10);
order.verify(inputStream).skip(8);
order.verify(inputStream).skip(6);
order.verify(inputStream).skip(4);
order.verify(inputStream).skip(2);
verifyNoMoreInteractions(inputStream);
}
@Test
public void testUnsuccessfulSkip() throws Exception {
InputStream inputStream = mock(InputStream.class);
when(inputStream.skip(anyLong())).thenReturn(3L, 5L, 0L, 6L, 0L);
when(inputStream.read()).thenReturn(3, -1);
assertEquals(15, StreamUtil.skip(inputStream, 20));
InOrder order = inOrder(inputStream);
order.verify(inputStream).skip(20);
order.verify(inputStream).skip(17);
order.verify(inputStream).skip(12);
order.verify(inputStream).read();
order.verify(inputStream).skip(11);
order.verify(inputStream).skip(5);
order.verify(inputStream).read();
verifyNoMoreInteractions(inputStream);
}
private void checkFileInputStream(int size) throws IOException {
byte[] bytesToWrite = new byte[size];
for (int i = 0; i < size; i++) {
bytesToWrite[i] = (byte) i; // It's okay to truncate
}
File tmpFile = File.createTempFile("streamUtil", "test");
InputStream input = null;
OutputStream output = null;
try {
output = new FileOutputStream(tmpFile);
output.write(bytesToWrite);
output.close();
input = new FileInputStream(tmpFile);
byte[] bytesRead = StreamUtil.getBytesFromStream(input);
assertTrue(Arrays.equals(bytesToWrite, bytesRead));
} finally {
Closeables.close(input, true);
Closeables.close(output, false);
assertTrue(tmpFile.delete());
}
}