Refactor phone number provider

providers/phonenumber/phonenumber.go

@@ -6,12 +6,14 @@ import (
 	"time"
 )
 
-// RandomPersianMobileNumber generates a Persian mobile phonenumber.
-func RandomPersianMobileNumber() string {
-	prefixes := []string{"0912", "0913", "0914", "0915", "0916"}
+var rng = rand.New(rand.NewSource(time.Now().UnixNano()))
+
+type phoneNumber struct {
+}
 
-	src := rand.NewSource(time.Now().UnixNano())
-	rng := rand.New(src)
+// GeneratePersianMobileNumber generates a Persian mobile phone number.
+func (phoneNumber) GeneratePersianMobileNumber() string {
+	prefixes := []string{"0912", "0913", "0914", "0915", "0916"}
 
 	prefix := prefixes[rng.Intn(len(prefixes))]
 

providers/phonenumber/phonenumber_test.go

@@ -4,12 +4,13 @@ import (
 	"testing"
 )
 
-// TestRandomPersianMobileNumber checks if the generated mobile phonenumber is correctly formatted.
-func TestRandomPersianMobileNumber(t *testing.T) {
-	generatedNumber := RandomPersianMobileNumber()
+// TestGeneratePersianMobileNumber checks if the generated mobile phone number is correctly formatted.
+func TestGeneratePersianMobileNumber(t *testing.T) {
+	phoneNumber := &phoneNumber{}
+	generatedNumber := phoneNumber.GeneratePersianMobileNumber()
 
 	if len(generatedNumber) != 11 {
-		t.Errorf("Expected mobile phonenumber length of 11, but got %d", len(generatedNumber))
+		t.Errorf("Expected mobile phone number length of 11, but got %d", len(generatedNumber))
 	}
 
 	validPrefixes := []string{"0912", "0913", "0914", "0915", "0916"}
@@ -24,12 +25,12 @@ func TestRandomPersianMobileNumber(t *testing.T) {
 	}
 
 	if !found {
-		t.Errorf("Generated mobile phonenumber has an invalid prefix: %s", prefix)
+		t.Errorf("Generated mobile phone number has an invalid prefix: %s", prefix)
 	}
 
 	for _, c := range generatedNumber[4:] {
 		if c < '0' || c > '9' {
-			t.Errorf("Generated mobile phonenumber contains non-digit characters: %s", generatedNumber)
+			t.Errorf("Generated mobile phone number contains non-digit characters: %s", generatedNumber)
 			break
 		}
 	}