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"""Caption-request wording per sub-tier and the ``--legacy-caption-wording`` switch.
"""
import pytest

gen = pytest.importorskip("strangebench.generation.gen_sd35l_e2e")

TYPICAL = ("in a natural everyday context", "are commonly seen together")
ATYPICAL = ("in an unusual or unexpected context", "are unusually paired")


def scene(sub_tier, n):
    return {"sub_tier": sub_tier, "n_partners": n}


@pytest.mark.parametrize("label,n", [("tier2_1atypical", 1), ("tier5_4atypical", 4), ("tier6_5atypical", 5),
                                     ("tier2_1atypical__small_anchor", 1)])
def test_atypical_arms(label, n):
    assert gen.tier_descriptor(scene(label, n)) == ATYPICAL
    assert gen.tier_descriptor(scene(label, n), legacy_wording=True) == TYPICAL


@pytest.mark.parametrize("label,n", [("tier2_1typical", 1), ("tier6_5typical", 5), ("tier_never", 2),
                                     ("tier_never_k3", 3), ("tier1_natural_bg", 0), ("tier1_atypical_bg", 0)])
def test_other_tiers_unchanged_by_switch(label, n):
    assert gen.tier_descriptor(scene(label, n)) == gen.tier_descriptor(scene(label, n), legacy_wording=True)


def test_never_and_background_wording():
    assert gen.tier_descriptor(scene("tier_never", 2))[1] == "would normally never appear together"
    assert gen.tier_descriptor(scene("tier1_atypical_bg", 0))[0] == "set in an unusual or unexpected environment"