import pubrules as PR


def test_identical_and_faithful_rewrites_pass():
    o = "The value rose to 5 % at 20 °C, which suggests a thermal effect."
    assert PR.violations(o, o) == []
    assert PR.violations(o, "The value rose to 5% at 20°C, suggesting a thermal effect.") == []


def test_numbers_and_units():
    assert "numbers or units changed" in PR.violations("The drop was 5 ms.", "The drop was 5 s.")
    assert "numbers or units changed" in PR.violations("We used 30 samples.", "We used 31 samples.")


def test_negation_direction_and_strength():
    assert "negation changed" in PR.violations("The filter does not remove noise.", "The filter removes noise.")
    assert any(v.startswith("direction reversed") for v in
               PR.violations("The error increased with depth.", "The error decreased with depth."))
    assert "hedging removed (claim made stronger)" in PR.violations("This may reduce drift.", "This reduces drift.")
    assert "claim made stronger" in PR.violations("The model reduces drift.", "The model clearly reduces drift.")


def test_reporting_verbs_are_not_hedges():
    # "indicate" -> "show" is a normal paraphrase; "suggests" -> "shows" strengthens the claim
    assert PR.violations("The results indicate that X does not moderate Y.",
                         "The results show that X does not moderate Y.") == []
    assert PR.violations("This suggests that X moderates Y.", "This shows that X moderates Y.") == \
        ["hedging removed (claim made stronger)"]
    assert PR.violations("This suggests that X moderates Y.", "This implies that X moderates Y.") == []


def test_one_sentence_in_one_out_and_acronyms():
    assert "sentence split or merged" in PR.violations("The CNN works and it is fast.", "The CNN works. It is fast.")
    assert "acronym dropped" in PR.violations("The CNN works well here.", "The network works well here.")
    assert "acronym added" in PR.violations("The network works well here.", "The CNN works well here.")


def test_no_added_cause_or_voice():
    o = "The findings reveal that support mediates this relationship, suggesting that supported staff stay engaged."
    assert "causal link added" in PR.violations(o, "Because support mediates this relationship, supported staff "
                                                   "are likely to stay engaged.")
    assert "first person plural added" in PR.violations("This study examines 412 workers.", "We examine 412 workers.")
    assert PR.violations("We examine 412 workers because data exist.", "We study 412 workers because data exist.") == []