@Test
void shouldHaveEmptyReports() {

    History history = mock(History.class);
    when(history.getBuild()).thenReturn(Optional.empty());
    Report report = new Report();
    DeltaReport deltaReport = new DeltaReport(report, history, 0);
    assertThat(deltaReport)
            .isEmpty()
            .hasNoAllIssues()
            .hasNoOutstandingIssues()
            .hasNoNewIssues()
            .hasNoFixedIssues()
            .hasReferenceBuildId(StringUtils.EMPTY);
}