@Override
  public CloseableIterator<ScannerReport.LineCoverage> readComponentCoverage(int fileRef) {
    ensureInitialized();
    return delegate.readComponentCoverage(fileRef);
  }
@Test
  public void readComponentCoverage_returns_empty_CloseableIterator_when_file_does_not_exist() {
    assertThat(underTest.readComponentCoverage(COMPONENT_REF)).isExhausted();
  }