patchwork

package slug

import (
	"encoding/json"
	"os"
	"testing"
)

// testdata/parity.json is generated by running moonflower's JavaScript slug
// code over tricky file names; the Go rule must agree on every row.
func TestDatestripSlugifyParity(t *testing.T) {
	raw, err := os.ReadFile("testdata/parity.json")
	if err != nil {
		t.Fatal(err)
	}
	var rows []struct{ File, Slug string }
	if err := json.Unmarshal(raw, &rows); err != nil {
		t.Fatal(err)
	}
	if len(rows) == 0 {
		t.Fatal("empty parity table")
	}
	for _, row := range rows {
		if got := DatestripSlugify(row.File); got != row.Slug {
			t.Errorf("DatestripSlugify(%q) = %q, want %q", row.File, got, row.Slug)
		}
	}
}

func TestPath(t *testing.T) {
	cases := map[string]string{
		"notes/Ação.md":         "notes/acao",
		"a/b/2026-01-01-x.md":   "a/b/2026-01-01-x",
		"top.md":                "top",
		"🌙/only-dir-dropped.md": "only-dir-dropped",
	}
	for in, want := range cases {
		if got := Path(in); got != want {
			t.Errorf("Path(%q) = %q, want %q", in, got, want)
		}
	}
}

func TestDatePrefix(t *testing.T) {
	cases := map[string]string{
		"2026-06-21-bem-vindo.md":        "2026-06-21",
		"2026-06-21 título.md":           "2026-06-21",
		"2026-13-45-invalid.md":          "",
		"2026-06-21.md":                  "",
		"jardim-de-agentes-autonomos.md": "",
	}
	for in, want := range cases {
		got, ok := DatePrefix(in)
		if got != want || ok != (want != "") {
			t.Errorf("DatePrefix(%q) = %q, %v", in, got, ok)
		}
	}
}

func TestLookup(t *testing.T) {
	if _, err := Lookup("datestrip-slugify"); err != nil {
		t.Fatal(err)
	}
	if _, err := Lookup("nope"); err == nil {
		t.Fatal("want error for unknown rule")
	}
}