@Test
public void fileExistsTest() {

    FileExists fileExists = new FileExists().relative("/src/main/resources/application.properties");
    TUExecutionResult executionResult = fileExists.execution(transformedAppFolder, transformationContext);
    Assert.assertEquals(executionResult.getType(), TUExecutionResult.Type.VALUE);
    Assert.assertNotNull(executionResult.getValue());
    Assert.assertTrue((Boolean) executionResult.getValue());
    Assert.assertEquals(fileExists.getDescription(), "Check if file or folder '/src/main/resources/application.properties' exists");
}