Golang ile kullanıcı şifresinin beklentileri karşılayıp karşılamadığını kontrol etmek

package validator

import (
	"unicode"
)

// Password validates plain password against the rules defined below.
//
// upp: at least one upper case letter.
// low: at least one lower case letter.
// num: at least one digit.
// sym: at least one special character.
// tot: at least eight characters long.
// No empty string or whitespace.
func Password(pass string) bool {
	var (
		upp, low, num, sym bool
		tot                uint8
	)

	for _, char := range pass {
		switch {
		case unicode.IsUpper(char):
			upp = true
			tot++
		case unicode.IsLower(char):
			low = true
			tot++
		case unicode.IsNumber(char):
			num = true
			tot++
		case unicode.IsPunct(char) || unicode.IsSymbol(char):
			sym = true
			tot++
		default:
			return false
		}
	}

	if !upp || !low || !num || !sym || tot < 8 {
		return false
	}

	return true
}

package validator

import (
	"testing"
)

func TestPassword(t *testing.T) {
	tests := []struct {
		name  string
		pass  string
		valid bool
	}{
		{
			"NoCharacterAtAll",
			"",
			false,
		},
		{
			"JustEmptyStringAndWhitespace",
			" \n\t\r\v\f ",
			false,
		},
		{
			"MixtureOfEmptyStringAndWhitespace",
			"U u\n1\t?\r1\v2\f34",
			false,
		},
		{
			"MissingUpperCaseString",
			"uu1?1234",
			false,
		},
		{
			"MissingLowerCaseString",
			"UU1?1234",
			false,
		},
		{
			"MissingNumber",
			"Uua?aaaa",
			false,
		},
		{
			"MissingSymbol",
			"Uu101234",
			false,
		},
		{
			"LessThanRequiredMinimumLength",
			"Uu1?123",
			false,
		},
		{
			"ValidPassword",
			"Uu1?1234",
			true,
		},
	}

	for _, c := range tests {
		t.Run(c.name, func(t *testing.T) {
			if c.valid != Password(c.pass) {
				t.Fatal("invalid password")
			}
		})
	}
}

=== RUN   TestPassword
=== RUN   TestPassword/NoCharacterAtAll
=== RUN   TestPassword/JustEmptyStringAndWhitespace
=== RUN   TestPassword/MixtureOfEmptyStringAndWhitespace
=== RUN   TestPassword/MissingUpperCaseString
=== RUN   TestPassword/MissingLowerCaseString
=== RUN   TestPassword/MissingNumber
=== RUN   TestPassword/MissingSymbol
=== RUN   TestPassword/LessThanRequiredMinimumLength
=== RUN   TestPassword/ValidPassword
--- PASS: TestPassword (0.00s)
    --- PASS: TestPassword/NoCharacterAtAll (0.00s)
    --- PASS: TestPassword/JustEmptyStringAndWhitespace (0.00s)
    --- PASS: TestPassword/MixtureOfEmptyStringAndWhitespace (0.00s)
    --- PASS: TestPassword/MissingUpperCaseString (0.00s)
    --- PASS: TestPassword/MissingLowerCaseString (0.00s)
    --- PASS: TestPassword/MissingNumber (0.00s)
    --- PASS: TestPassword/MissingSymbol (0.00s)
    --- PASS: TestPassword/LessThanRequiredMinimumLength (0.00s)
    --- PASS: TestPassword/ValidPassword (0.00s)
PASS
ok  	internal/pkg/validator	0.010s