package lookup

import "testing"

// The district only ever reaches the log if it has the RIGHT SHAPE. HamQTH's
// oblast field is filled by hand, so it arrives in whatever form the operator's
// editor encouraged — and anything that is not a district reference must yield
// nothing at all rather than a reference no list contains.
func TestRDARef(t *testing.T) {
	for _, c := range []struct{ in, want string }{
		{"KE-29", "KE-29"},
		{"ke-29", "KE-29"},
		{"  KE-29  ", "KE-29"},
		{"KE-29 Kemerovskaya obl.", "KE-29"},
		{"Kemerovskaya obl. (KE-29)", "KE-29"},
		{"", ""},
		{"Kemerovskaya oblast", ""}, // a name, not a reference
		{"KE", ""},                  // the oblast alone carries no district
		{"KE-1", ""},                // one digit is not an RDA
		{"KE-291", ""},              // three digits is not one either
		{"650000", ""},              // a postal code
		{"EU-064", ""},              // an IOTA reference in the wrong field
	} {
		if got := rdaRef(c.in); got != c.want {
			t.Errorf("rdaRef(%q) = %q, want %q", c.in, got, c.want)
		}
	}
	// oblast wins over district; an empty first field falls through to the next.
	if got := rdaRef("", "MO-19"); got != "MO-19" {
		t.Errorf("fallback to district = %q, want MO-19", got)
	}
	if got := rdaRef("KE-29", "MO-19"); got != "KE-29" {
		t.Errorf("oblast must win, got %q", got)
	}
}