Junit 5 temp directory quick start

The tempDirectory extension makes it quite handy to test file reading/writing functions.

Maven dependency

<dependency>
   <groupId>org.junit-pioneer</groupId>
   <artifactId>junit-pioneer</artifactId>
   <version>0.1.2</version>
   <scope>test</scope>
</dependency>

Java

@Test
@ExtendWith(TempDirectory.class)
void withProperties(@TempDir Path tempDir) throws IOException {
    Path path = tempDir.resolve("env.properties");
    String properties = "a=b";
    Files.write(path, properties.getBytes());
    Map<String, Object> props = EnvPropertiesLoader.loadEnvProperties();
    assertThat(props.get("a"), is("b"));
}