TemporaryFolder in Junit

Dependencies:

    <dependency>

      <groupId>com.google.guava</groupId>

      <artifactId>guava</artifactId>

      <version>19.0</version>

    </dependency>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>4.12</version>

    </dependency>

Code:

import com.google.common.base.Charsets;

import com.google.common.io.Files;

import org.junit.Rule;

import org.junit.Test;

import org.junit.rules.TemporaryFolder;

import java.io.File;

public class TestTempFolder {

  // create temporary folder using Junit, it will be deleted automatically upon test success or failure

  // restriction: cannot be static

 // should be public

  @Rule

  public TemporaryFolder testFolder = new TemporaryFolder();

  @Test

  public void testTempFolder() throws Exception {

    // create file inside of temporary folder

    File mainFile = testFolder.newFile("main.csv");

    // write data into newly created file using guava lib

    Files.write("main data", mainFile, Charsets.UTF_8);

    // create folder inside of temporary folder

    File nestedFolder = testFolder.newFolder("nested");

    // create file inside of nested folder

    File nestedFile = new File(nestedFolder, "nested.csv");

    // write data into newly created file using guava lib

    Files.write("nested data", nestedFile, Charsets.UTF_8);

  }

}