TempDirExample.java

@TestMethodOrder(OrderAnnotation.class)
public class TestTempDir {

	@TempDir
	static Path classTempDir;
	
	@TempDir
	static File classTempDirAsFile;

	@Test
	@Order(1)
	public void useAsClassValue() throws IOException {
		File file = classTempDir.resolve("temp.txt").toFile();
		FileUtils.write(file, "A", StandardCharsets.ISO_8859_1, true);
		assertEquals("A", FileUtils.readFileToString(file, StandardCharsets.ISO_8859_1));
	}

	@Test
	@Order(2)
	public void useAsClassValuePart2() throws IOException {
		File file = classTempDir.resolve("temp.txt").toFile();
		FileUtils.write(file, "B", StandardCharsets.ISO_8859_1, true);
		assertEquals("AB", FileUtils.readFileToString(file, StandardCharsets.ISO_8859_1));
	}

	@Test
	@Order(3)
	public void injectAsMethodValue(@TempDir Path argumentTempDir) throws IOException {
		File file = argumentTempDir.resolve("temp.txt").toFile();
		FileUtils.write(file, "C", StandardCharsets.ISO_8859_1, true);
		assertEquals("ABC", FileUtils.readFileToString(file, StandardCharsets.ISO_8859_1));
	}
	
	@Test
	@Order(4)
	public void injectAsMethodValuePart2(@TempDir Path argumentTempDir) throws IOException {
		File file = argumentTempDir.resolve("temp.txt").toFile();
		FileUtils.write(file, "D", StandardCharsets.ISO_8859_1, true);
		assertEquals("ABCD", FileUtils.readFileToString(file, StandardCharsets.ISO_8859_1));
	}
	
	@Test
	@Order(5)
	public void useAsClassFileValue() throws IOException {
		File file = new File(classTempDirAsFile, "temp.txt");
		FileUtils.write(file, "E", StandardCharsets.ISO_8859_1, true);
		assertEquals("ABCDE", FileUtils.readFileToString(file, StandardCharsets.ISO_8859_1));
	}
	
	@Test
	@Order(6)
	public void injectAsMethodFileValue(@TempDir File tempFile) throws IOException {
		File file = new File(classTempDirAsFile, "temp.txt");
		FileUtils.write(file, "F", StandardCharsets.ISO_8859_1, true);
		assertEquals("ABCDEF", FileUtils.readFileToString(file, StandardCharsets.ISO_8859_1));
	}
}