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BAEL-4010 Add test for InputStream.readAllBytes() (#9265)

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* BAEL-4010 Add test for InputStream.readAllBytes()

* BAEL-4010 Refactor: Move "InputStream to Bytes" to Java 9 specific module

The issue BAEL-4010 introduces a new example to the article "Java
InputStream to Byte Array and ByteBuffer". The example is about
  byte[] InputStream.readAllBytes()
which was added with Java 9.

To be consistent, all examples for this article were moved to a module
which is compiled with at least Java 9.
This commit is contained in:
Roland Weisleder
2020-05-19 22:24:05 +02:00
committed by GitHub
parent 01f9b06656
commit 2ce056b0f2
6 changed files with 64 additions and 39 deletions
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1
core-java-modules/core-java-io-conversions-2/README.md
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@@ -4,6 +4,5 @@ This module contains articles about core Java input/output(IO) conversions.
### Relevant Articles:
- [Java InputStream to String](https://www.baeldung.com/convert-input-stream-to-string)
- [Java InputStream to Byte Array and ByteBuffer](https://www.baeldung.com/convert-input-stream-to-array-of-bytes)
- [Java – Write an InputStream to a File](https://www.baeldung.com/convert-input-stream-to-a-file)
- More articles: [[<-- prev]](/core-java-modules/core-java-io-conversions)

56
core-java-modules/core-java-io-conversions-2/src/test/java/com/baeldung/inputstreamtobytes/InputStreamToByteBufferUnitTest.java
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@@ -1,56 +0,0 @@
package com.baeldung.inputstreamtobytes;
import com.google.common.io.ByteSource;
import com.google.common.io.ByteStreams;
import org.apache.commons.io.IOUtils;
import org.junit.Test;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;
import static java.nio.channels.Channels.newChannel;
import static org.junit.Assert.assertEquals;
public class InputStreamToByteBufferUnitTest {
@Test
public void givenUsingCoreClasses_whenByteArrayInputStreamToAByteBuffer_thenLengthMustMatch() throws IOException {
byte[] input = new byte[] { 0, 1, 2 };
InputStream initialStream = new ByteArrayInputStream(input);
ByteBuffer byteBuffer = ByteBuffer.allocate(3);
while (initialStream.available() > 0) {
byteBuffer.put((byte) initialStream.read());
}
assertEquals(byteBuffer.position(), input.length);
}
@Test
public void givenUsingGuava__whenByteArrayInputStreamToAByteBuffer_thenLengthMustMatch() throws IOException {
InputStream initialStream = ByteSource
.wrap(new byte[] { 0, 1, 2 })
.openStream();
byte[] targetArray = ByteStreams.toByteArray(initialStream);
ByteBuffer bufferByte = ByteBuffer.wrap(targetArray);
while (bufferByte.hasRemaining()) {
bufferByte.get();
}
assertEquals(bufferByte.position(), targetArray.length);
}
@Test
public void givenUsingCommonsIo_whenByteArrayInputStreamToAByteBuffer_thenLengthMustMatch() throws IOException {
byte[] input = new byte[] { 0, 1, 2 };
InputStream initialStream = new ByteArrayInputStream(input);
ByteBuffer byteBuffer = ByteBuffer.allocate(3);
ReadableByteChannel channel = newChannel(initialStream);
IOUtils.readFully(channel, byteBuffer);
assertEquals(byteBuffer.position(), input.length);
}
}

37
core-java-modules/core-java-io-conversions-2/src/test/java/com/baeldung/inputstreamtostring/JavaInputStreamToXUnitTest.java
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@@ -2,7 +2,6 @@ package com.baeldung.inputstreamtostring;
import com.google.common.base.Charsets;
import com.google.common.io.ByteSource;
import com.google.common.io.ByteStreams;
import com.google.common.io.CharStreams;
import com.google.common.io.Files;
import org.apache.commons.io.FileUtils;
@@ -152,42 +151,6 @@ public class JavaInputStreamToXUnitTest {
assertThat(result, equalTo(originalString));
}
// tests - InputStream to byte[]
@Test
public final void givenUsingPlainJavaOnFixedSizeStream_whenConvertingAnInputStreamToAByteArray_thenCorrect() throws IOException {
final InputStream initialStream = new ByteArrayInputStream(new byte[] { 0, 1, 2 });
final byte[] targetArray = new byte[initialStream.available()];
initialStream.read(targetArray);
}
@Test
public final void givenUsingPlainJavaOnUnknownSizeStream_whenConvertingAnInputStreamToAByteArray_thenCorrect() throws IOException {
final InputStream is = new ByteArrayInputStream(new byte[] { 0, 1, 2 });
final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
final byte[] data = new byte[1024];
while ((nRead = is.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
final byte[] byteArray = buffer.toByteArray();
}
@Test
public final void givenUsingGuava_whenConvertingAnInputStreamToAByteArray_thenCorrect() throws IOException {
final InputStream initialStream = ByteSource.wrap(new byte[] { 0, 1, 2 }).openStream();
final byte[] targetArray = ByteStreams.toByteArray(initialStream);
}
@Test
public final void givenUsingCommonsIO_whenConvertingAnInputStreamToAByteArray_thenCorrect() throws IOException {
final InputStream initialStream = new ByteArrayInputStream(new byte[] { 0, 1, 2 });
final byte[] targetArray = IOUtils.toByteArray(initialStream);
}
// tests - InputStream to File
@Test