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SlabUploader/backend/tests/test_thickness_band.py
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Python

"""Thickness band resolution (METADATA-15 / QUALITY-95).
The owner never picks the Woo thickness band in the UI — the server derives it
from the measured thickness_in against the live synced bands. These tests pin the
derivation on the real live band names (from the UAT taxonomy) and on the
quarter-inch slug fallback.
"""
import pytest
from backend.thickness_band import (
parse_inch_token,
resolve_thickness_band_id,
term_bounds,
)
# The live UAT Thickness attribute (pa_thk) as synced: name, slug.
LIVE_TERMS = [
{"id": 347, "name": "Under 1/2\"", "slug": "xthin"},
{"id": 348, "name": "1/2\" - 3/4\"", "slug": "2-3qtr"},
{"id": 349, "name": "3/4\" - 1\"", "slug": "3-4qtr"},
{"id": 350, "name": "1\"- 1 1/2\"", "slug": "4-6qtr"},
{"id": 351, "name": "1 1/2\" - 2\"", "slug": "6-8qtr"},
{"id": 352, "name": "2\" - 3\"", "slug": "8-12qtr"},
{"id": 353, "name": "Over 3\"", "slug": "12qtr"},
]
@pytest.mark.parametrize(
"text,expected",
[
("1 1/2", 1.5),
("3/4", 0.75),
("2", 2.0),
("1.75", 1.75),
("2\"", 2.0),
("1 1/2\"", 1.5),
],
)
def test_parse_inch_token(text, expected):
assert parse_inch_token(text) == pytest.approx(expected)
def test_parse_inch_token_rejects_junk():
assert parse_inch_token("") is None
assert parse_inch_token(" ") is None
def test_term_bounds_from_live_names():
assert term_bounds(LIVE_TERMS[0]) == (0.0, 0.5)
assert term_bounds(LIVE_TERMS[1]) == (0.5, 0.75)
assert term_bounds(LIVE_TERMS[3]) == (1.0, 1.5)
assert term_bounds(LIVE_TERMS[6]) == (3.0, float("inf"))
def test_term_bounds_falls_back_to_qtr_slug():
assert term_bounds({"id": 9, "name": "weird", "slug": "4-6qtr"}) == (1.0, 1.5)
assert term_bounds({"id": 9, "name": "weird", "slug": "12qtr"}) == (3.0, float("inf"))
assert term_bounds({"id": 9, "name": "weird", "slug": "xthin"}) == (0.0, 0.5)
@pytest.mark.parametrize(
"thickness,expected_id",
[
(0.25, 347), # Under 1/2"
(0.5, 348), # boundary rounds UP into 1/2"-3/4", not down
(0.625, 348),
(0.75, 349), # boundary rounds UP
(0.875, 349),
(1.0, 350), # QUALITY-95: 1 inch rounds up into 1"-1 1/2", not a hardcoded band
(1.25, 350),
(1.5, 351),
(1.75, 351), # the UAT sample thickness
(2.0, 352),
(2.75, 352),
(3.0, 353),
(4.0, 353),
],
)
def test_resolve_rounds_up_on_boundary(thickness, expected_id):
assert resolve_thickness_band_id(thickness, LIVE_TERMS) == expected_id
def test_resolve_handles_missing_inputs():
assert resolve_thickness_band_id(None, LIVE_TERMS) is None
assert resolve_thickness_band_id(-1, LIVE_TERMS) is None
assert resolve_thickness_band_id(1.0, []) is None
# A term with no parseable name/slug is skipped, never guessed at.
assert resolve_thickness_band_id(1.0, [{"id": 1, "name": "mystery", "slug": "mystery"}]) is None
def test_resolve_is_id_order_independent():
"""The result must not depend on the sync order of the terms."""
assert resolve_thickness_band_id(1.75, list(reversed(LIVE_TERMS))) == 351