@Test
public void verify_readFileSource() throws IOException {
File file = writer.getSourceFile(COMPONENT_REF);
FileUtils.writeLines(file, of("1", "2", "3"));
CloseableIterator<String> res = underTest.readFileSource(COMPONENT_REF).get();
assertThat(res).containsExactly("1", "2", "3");
res.close();
}
@Test
public void readFileSource_returns_absent_optional_when_file_does_not_exist() {
assertThat(underTest.readFileSource(COMPONENT_REF)).isAbsent();
}