Add Unit Tests for uuid.go in utils package

utils/uuid_test.go

@@ -0,0 +1,44 @@
+package utils
+
+import (
+	"testing"
+)
+
+// TestNewUUID tests the NewUUID function to ensure that it returns
+// a valid UUID string of the expected length and format
+func TestNewUUID(t *testing.T) {
+	uuidStr, err := NewUUID()
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+
+	if len(uuidStr) != 36 {
+		t.Fatalf("expected UUID length of 36, got %d", len(uuidStr))
+	}
+
+	expectedFormat := "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+	if !matchesFormat(uuidStr, expectedFormat) {
+		t.Fatalf("UUID does not match expected format, got %v", uuidStr)
+	}
+}
+
+// matchesFormat checks whether the given UUID string
+// matches the expected format
+func matchesFormat(uuidStr, format string) bool {
+	if len(uuidStr) != len(format) {
+		return false
+	}
+	for i := range uuidStr {
+		if format[i] == 'x' && !isHex(uuidStr[i]) {
+			return false
+		} else if format[i] == '-' && uuidStr[i] != '-' {
+			return false
+		}
+	}
+	return true
+}
+
+// isHex checks whether the given character is hexadecimal or not
+func isHex(char byte) bool {
+	return (char >= '0' && char <= '9') || (char >= 'a' && char <= 'f')
+}