diff --git a/core-java/src/test/java/com/baeldung/copyfiles/FileCopierTest.java b/core-java/src/test/java/com/baeldung/copyfiles/FileCopierTest.java
new file mode 100644
index 0000000000..973436a26a
--- /dev/null
+++ b/core-java/src/test/java/com/baeldung/copyfiles/FileCopierTest.java
@@ -0,0 +1,70 @@
+package com.baeldung.copyfiles;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+
+import org.apache.commons.io.FileUtils;
+import org.junit.Before;
+import org.junit.Test;
+import static org.assertj.core.api.Assertions.*;
+
+public class FileCopierTest {
+	File original = new File("src/test/resources/original.txt");
+
+	@Before
+	public void init() throws IOException {
+		if (!original.exists())
+			Files.createFile(original.toPath());
+	}
+
+	@Test
+	public void givenIoAPI_whenCopied_thenCopyExistsWithSameContents() throws IOException {
+		File copied = new File("src/test/resources/copiedWithIo.txt");
+		try (InputStream in = new BufferedInputStream(new FileInputStream(original));
+				OutputStream out = new BufferedOutputStream(new FileOutputStream(copied))) {
+			byte[] buffer = new byte[1024];
+			int lengthRead;
+			while ((lengthRead = in.read(buffer)) > 0) {
+				out.write(buffer, 0, lengthRead);
+				out.flush();
+			}
+		}
+		assertThat(copied).exists();
+		assertThat(Files.readAllLines(original.toPath()).equals(Files.readAllLines(copied.toPath())));
+	}
+
+	@Test
+	public void givenCommonsIoAPI_whenCopied_thenCopyExistsWithSameContents() throws IOException {
+		File copied = new File("src/test/resources/copiedWithApacheCommons.txt");
+		FileUtils.copyFile(original, copied);
+		assertThat(copied).exists();
+		assertThat(Files.readAllLines(original.toPath()).equals(Files.readAllLines(copied.toPath())));
+	}
+
+	@Test
+	public void givenNIO2_whenCopied_thenCopyExistsWithSameContents() throws IOException {
+		Path copied = Paths.get("src/test/resources/copiedWithNio.txt");
+		Path originalPath = original.toPath();
+		Files.copy(originalPath, copied, StandardCopyOption.REPLACE_EXISTING);
+		assertThat(copied).exists();
+		assertThat(Files.readAllLines(originalPath).equals(Files.readAllLines(copied)));
+	}
+
+	@Test
+	public void givenGuava_whenCopied_thenCopyExistsWithSameContents() throws IOException {
+		File copied = new File("src/test/resources/copiedWithApacheCommons.txt");
+		com.google.common.io.Files.copy(original, copied);
+		assertThat(copied).exists();
+		assertThat(Files.readAllLines(original.toPath()).equals(Files.readAllLines(copied.toPath())));
+	}
+}
diff --git a/core-java/src/test/resources/original.txt b/core-java/src/test/resources/original.txt
new file mode 100644
index 0000000000..cf8c89d389
--- /dev/null
+++ b/core-java/src/test/resources/original.txt
@@ -0,0 +1,2 @@
+#Copy a File with Java (www.Baeldung.com)
+Copying Files with Java is Fun!
\ No newline at end of file