/*
* Copyright 2002-2013 the original author or authors.
*
* 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 org.springframework.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Random;
import java.util.UUID;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import static org.mockito.BDDMockito.*;
/**
* Tests for {@link StreamUtils}.
*
* @author Phillip Webb
*/
public class StreamUtilsTests {
private byte[] bytes = new byte[StreamUtils.BUFFER_SIZE + 10];
private String string = "";
@Before
public void setup() {
new Random().nextBytes(bytes);
while (string.length() < StreamUtils.BUFFER_SIZE + 10) {
string += UUID.randomUUID().toString();
}
}
@Test
public void copyToByteArray() throws Exception {
InputStream inputStream = spy(new ByteArrayInputStream(bytes));
byte[] actual = StreamUtils.copyToByteArray(inputStream);
assertThat(actual, equalTo(bytes));
verify(inputStream, never()).close();
}
@Test
public void copyToString() throws Exception {
Charset charset = Charset.defaultCharset();
InputStream inputStream = spy(new ByteArrayInputStream(string.getBytes(charset)));
String actual = StreamUtils.copyToString(inputStream, charset);
assertThat(actual, equalTo(string));
verify(inputStream, never()).close();
}
@Test
public void copyBytes() throws Exception {
ByteArrayOutputStream out = spy(new ByteArrayOutputStream());
StreamUtils.copy(bytes, out);
assertThat(out.toByteArray(), equalTo(bytes));
verify(out, never()).close();
}
@Test
public void copyString() throws Exception {
Charset charset = Charset.defaultCharset();
ByteArrayOutputStream out = spy(new ByteArrayOutputStream());
StreamUtils.copy(string, charset, out);
assertThat(out.toByteArray(), equalTo(string.getBytes(charset)));
verify(out, never()).close();
}
@Test
public void copyStream() throws Exception {
ByteArrayOutputStream out = spy(new ByteArrayOutputStream());
StreamUtils.copy(new ByteArrayInputStream(bytes), out);
assertThat(out.toByteArray(), equalTo(bytes));
verify(out, never()).close();
}
@Test
public void copyRange() throws Exception {
ByteArrayOutputStream out = spy(new ByteArrayOutputStream());
StreamUtils.copyRange(new ByteArrayInputStream(bytes), out, 0, 100);
byte[] range = Arrays.copyOfRange(bytes, 0, 101);
assertThat(out.toByteArray(), equalTo(range));
verify(out, never()).close();
}
@Test
public void nonClosingInputStream() throws Exception {
InputStream source = mock(InputStream.class);
InputStream nonClosing = StreamUtils.nonClosing(source);
nonClosing.read();
nonClosing.read(bytes);
nonClosing.read(bytes, 1, 2);
nonClosing.close();
InOrder ordered = inOrder(source);
ordered.verify(source).read();
ordered.verify(source).read(bytes, 0, bytes.length);
ordered.verify(source).read(bytes, 1, 2);
ordered.verify(source, never()).close();
}
@Test
public void nonClosingOutputStream() throws Exception {
OutputStream source = mock(OutputStream.class);
OutputStream nonClosing = StreamUtils.nonClosing(source);
nonClosing.write(1);
nonClosing.write(bytes);
nonClosing.write(bytes, 1, 2);
nonClosing.close();
InOrder ordered = inOrder(source);
ordered.verify(source).write(1);
ordered.verify(source).write(bytes, 0, bytes.length);
ordered.verify(source).write(bytes, 1, 2);
ordered.verify(source, never()).close();
}
}