Jan Novak
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Three-pass regex parser matching python/czech_utils.py parse_month_references: 1. Numeric slash notation — "11+12/2025", "01/26"; 2-digit year → +2000 2. Dot notation — "12.2025" (4-digit year only) 3. Czech month names — range walk (listopad-leden wrap logic) then standalone with m≥10 → defaultYear-1 heuristic; longest-match alternation (sorted desc by name length) handles cervenec vs cerven 35 table-driven tests, all expected outputs verified against live Python on 2026-05-05 before locking. Plan at docs/plans/2026-05-05-2337-go-rewrite-m2-2-parse-month-references.md. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
245 lines
6.4 KiB
Go
245 lines
6.4 KiB
Go
package czech
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import (
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"reflect"
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"testing"
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)
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func TestParseMonthReferences(t *testing.T) {
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t.Parallel()
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// All expected outputs verified against live Python implementation on 2026-05-05:
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// PYTHONPATH=scripts:. python -c 'from czech_utils import parse_month_references; print(parse_month_references("<input>", 2026))'
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tests := []struct {
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name string
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input string
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defaultYear int
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want []string
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}{
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{
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name: "empty",
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input: "",
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defaultYear: 2026,
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want: []string{},
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},
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{
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name: "numeric plus-split two months full year",
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input: "11+12/2025",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12"},
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},
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{
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name: "numeric single month full year",
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input: "1/2026",
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defaultYear: 2026,
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want: []string{"2026-01"},
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},
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{
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name: "numeric 2-digit year",
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input: "01/26",
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defaultYear: 2026,
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want: []string{"2026-01"},
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},
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{
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name: "numeric plus-split with 2-digit year",
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input: "11+12/25",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12"},
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},
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{
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name: "numeric three months sorted",
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input: "12+1+2/2026",
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defaultYear: 2026,
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want: []string{"2026-01", "2026-02", "2026-12"},
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},
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{
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name: "dot pattern",
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input: "12.2025",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "dot pattern requires 4-digit year",
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input: "1.26",
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defaultYear: 2026,
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want: []string{},
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},
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{
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name: "standalone month below m10 threshold",
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input: "leden",
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defaultYear: 2026,
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want: []string{"2026-01"},
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},
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{
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name: "standalone month m10 heuristic",
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input: "prosinec",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "declension prosince",
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input: "prosince",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "declension lednu",
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input: "lednu",
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defaultYear: 2026,
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want: []string{"2026-01"},
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},
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{
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name: "standalone m10 boundary (rijen = October)",
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input: "rijen",
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defaultYear: 2026,
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want: []string{"2025-10"},
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},
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{
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name: "standalone m9 just below boundary (zari = September)",
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input: "zari",
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defaultYear: 2026,
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want: []string{"2026-09"},
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},
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{
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name: "range wrap Nov-Jan",
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input: "listopad-leden",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12", "2026-01"},
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},
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{
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name: "range wrap starting at October",
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input: "rijen-leden",
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defaultYear: 2026,
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want: []string{"2025-10", "2025-11", "2025-12", "2026-01"},
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},
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{
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name: "range no wrap",
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input: "unor-kveten",
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defaultYear: 2026,
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want: []string{"2026-02", "2026-03", "2026-04", "2026-05"},
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},
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{
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name: "degenerate range same month",
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input: "leden-leden",
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defaultYear: 2026,
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want: []string{"2026-01"},
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},
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{
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name: "range spanning m10 — heuristic does NOT fire for range members",
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input: "unor-listopad",
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defaultYear: 2026,
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want: []string{"2026-02", "2026-03", "2026-04", "2026-05", "2026-06", "2026-07", "2026-08", "2026-09", "2026-10", "2026-11"},
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},
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{
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name: "longest-match alternation cervenec beats cerven",
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input: "cervenec-srpen",
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defaultYear: 2026,
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want: []string{"2026-07", "2026-08"},
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},
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{
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name: "range plus standalone — range excludes, dedup",
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input: "listopad-leden, prosinec",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12", "2026-01"},
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},
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{
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name: "two standalones no range",
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input: "prosinec leden",
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defaultYear: 2026,
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want: []string{"2025-12", "2026-01"},
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},
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{
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name: "numeric plus range mix",
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input: "11+12/2025, leden-brezen",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12", "2026-01", "2026-02", "2026-03"},
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},
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{
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name: "dedup across numeric and standalone passes",
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input: "11+12/25 a listopad",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12"},
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},
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{
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name: "no digits before slash — standalone fires instead",
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input: "prosince/2025",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "range with trailing slash-year — numeric fails, range wins",
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input: "listopad-prosinec/2025",
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defaultYear: 2026,
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want: []string{"2026-11", "2026-12"},
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},
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{
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name: "dot pattern only — numeric matches but month out of 1-12 range",
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input: "01.2026 / 02.2026",
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defaultYear: 2026,
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want: []string{"2026-01", "2026-02"},
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},
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{
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name: "leading slash — numeric matches at second slash",
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input: "/12/2025",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "uppercase input normalized",
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input: "PROSINEC",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "diacritics stripped by Normalize",
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input: "Žluťoučký prosinec",
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defaultYear: 2026,
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want: []string{"2025-12"},
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},
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{
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name: "diacritics in range with spaces around dash",
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input: "Únor - květen",
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defaultYear: 2026,
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want: []string{"2026-02", "2026-03", "2026-04", "2026-05"},
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},
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{
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name: "natural language mixed with numeric and standalone",
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input: "platba 11/2025 a leden",
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defaultYear: 2026,
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want: []string{"2025-11", "2026-01"},
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},
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{
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name: "English month name not recognized",
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input: "December",
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defaultYear: 2026,
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want: []string{},
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},
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{
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name: "duplicate input deduped",
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input: "11+12/2025 11+12/2025",
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defaultYear: 2026,
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want: []string{"2025-11", "2025-12"},
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},
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{
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name: "trailing year without separator ignored",
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input: "leden 2026",
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defaultYear: 2026,
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want: []string{"2026-01"},
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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got := ParseMonthReferences(tc.input, tc.defaultYear)
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if got == nil {
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got = []string{}
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}
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if !reflect.DeepEqual(got, tc.want) {
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t.Errorf("ParseMonthReferences(%q, %d)\n got %v\n want %v",
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tc.input, tc.defaultYear, got, tc.want)
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}
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})
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}
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}
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