package handlers

import "testing"

func TestValidPairCode(t *testing.T) {
	tests := []struct {
		name string
		code string
		want bool
	}{
		{name: "valid", code: "AB23CD", want: true},
		{name: "ambiguous characters rejected", code: "AB01CD", want: false},
		{name: "lowercase rejected before normalization", code: "ab12cd", want: false},
		{name: "wrong length", code: "AB12C", want: false},
		{name: "unicode rejected", code: "ＡB12CD", want: false},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := validPairCode(tt.code); got != tt.want {
				t.Fatalf("validPairCode(%q) = %v, want %v", tt.code, got, tt.want)
			}
		})
	}
}