license_plate_test.go

package record

import (
	"errors"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestValidLicensePlate(t *testing.T) {
	tests := map[string]struct {
		input            string
		wantLicencePlate *LicensePlate
		wantErr          error
	}{
		"simple":                          {input: "12345678", wantLicencePlate: &LicensePlate{"12345678"}, wantErr: nil},
		"standard norwegian":              {input: "ÆÅ 12345", wantLicencePlate: &LicensePlate{"ÆÅ12345"}, wantErr: nil},
		"standard german":                 {input: "AB CD 1234", wantLicencePlate: &LicensePlate{"ABCD1234"}, wantErr: nil},
		"leading and trailing whitespace": {input: " AB12345 ", wantLicencePlate: &LicensePlate{"AB12345"}, wantErr: nil},
		"whitespace separated":            {input: " A B 1 2 3 4 5 6 ", wantLicencePlate: &LicensePlate{"AB123456"}, wantErr: nil},
		"upper and lower case":            {input: "aB 12345", wantLicencePlate: &LicensePlate{"AB12345"}, wantErr: nil},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			lp := NewLicensePlate(test.input)
			nlp, err := lp.Normalize()
			assert.Equal(t, test.wantErr, err)
			assert.Equal(t, test.wantLicencePlate, nlp)
		})
	}
}

func TestInvalidLicensePlate(t *testing.T) {
	tests := map[string]struct {
		input            string
		wantLicencePlate *LicensePlate
		wantErr          error
	}{
		"special characters":  {input: "\xf0\x9f\x90\x94", wantLicencePlate: nil, wantErr: errors.New("invalid character U+1F414 '🐔' at byte position 0")},
		"too many characters": {input: "123456789", wantLicencePlate: nil, wantErr: errors.New("more than 8 characters")},
		"all whitespace":      {input: "       ", wantLicencePlate: nil, wantErr: errors.New("no alphanumerics")},
		"empty":               {input: "", wantLicencePlate: nil, wantErr: errors.New("empty string")},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			lp := NewLicensePlate(test.input)
			nlp, err := lp.Normalize()
			assert.Equal(t, test.wantErr, err)
			assert.Equal(t, test.wantLicencePlate, nlp)
		})
	}
}