From df3b2605e33d8b426c67946e010b1c35ff027f44 Mon Sep 17 00:00:00 2001
From: eugenp <hanriseldon@gmail.com>
Date: Sat, 21 Jun 2014 18:31:20 +0300
Subject: [PATCH] file conversion work

---
 core-java/src/main/resources/targetFile.tmp   |  2 +
 .../java/io/JavaInputStreamToXUnitTest.java   | 43 +++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 core-java/src/main/resources/targetFile.tmp

diff --git a/core-java/src/main/resources/targetFile.tmp b/core-java/src/main/resources/targetFile.tmp
new file mode 100644
index 0000000000..20f137b416
--- /dev/null
+++ b/core-java/src/main/resources/targetFile.tmp
@@ -0,0 +1,2 @@
+line 1
+a second line
\ No newline at end of file
diff --git a/core-java/src/test/java/org/baeldung/java/io/JavaInputStreamToXUnitTest.java b/core-java/src/test/java/org/baeldung/java/io/JavaInputStreamToXUnitTest.java
index eb1215fdc6..7247ab1eb9 100644
--- a/core-java/src/test/java/org/baeldung/java/io/JavaInputStreamToXUnitTest.java
+++ b/core-java/src/test/java/org/baeldung/java/io/JavaInputStreamToXUnitTest.java
@@ -7,15 +7,20 @@ import static org.junit.Assert.assertThat;
 
 import java.io.BufferedReader;
 import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStream;
 import java.io.Reader;
 import java.io.StringWriter;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.util.Scanner;
 
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
 import org.junit.Test;
 import org.slf4j.Logger;
@@ -25,6 +30,7 @@ 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 com.google.common.io.InputSupplier;
 
 @SuppressWarnings("unused")
@@ -140,4 +146,41 @@ public class JavaInputStreamToXUnitTest {
         final byte[] targetArray = IOUtils.toByteArray(initialStream);
     }
 
+    // tests - InputStream to File
+
+    @Test
+    public final void givenUsingPlainJava_whenConvertingAnInputStreamToAFile_thenCorrect() throws IOException {
+        final InputStream initialStream = new FileInputStream(new File("src/main/resources/sample.txt"));
+        final byte[] buffer = new byte[initialStream.available()];
+        initialStream.read(buffer);
+
+        final File targetFile = new File("src/main/resources/targetFile.tmp");
+        final OutputStream outStream = new FileOutputStream(targetFile);
+        outStream.write(buffer);
+
+        IOUtils.closeQuietly(initialStream);
+        IOUtils.closeQuietly(outStream);
+    }
+
+    @Test
+    public final void givenUsingGuava_whenConvertingAnInputStreamToAFile_thenCorrect() throws IOException {
+        final InputStream initialStream = new FileInputStream(new File("src/main/resources/sample.txt"));
+        final byte[] buffer = new byte[initialStream.available()];
+        initialStream.read(buffer);
+
+        final File targetFile = new File("src/main/resources/targetFile.tmp");
+        Files.write(buffer, targetFile);
+
+        IOUtils.closeQuietly(initialStream);
+    }
+
+    @Test
+    public final void givenUsingCommonsIO_whenConvertingAnInputStreamToAFile_thenCorrect() throws IOException {
+        final InputStream initialStream = FileUtils.openInputStream(new File("src/main/resources/sample.txt"));
+
+        final File targetFile = new File("src/main/resources/targetFile.tmp");
+
+        FileUtils.copyInputStreamToFile(initialStream, targetFile);
+    }
+
 }