@Test
void shouldHaveNoRootFoldersWhenCreated() {

    WarningsPluginConfiguration configuration = createConfiguration();
    assertThat(configuration.getSourceDirectories()).isEmpty();
    assertThat(get(configuration, "")).isEqualTo(NORMALIZED);
    assertThat(get(configuration, "-")).isEqualTo(NORMALIZED);
    assertThat(get(configuration, ABSOLUTE_NOT_EXISTING)).isEqualTo(NORMALIZED);
    assertThat(get(configuration, RELATIVE)).isEqualTo(getWorkspaceChild(RELATIVE));
}