feat(crud): add utils for crud package

Author: maniac-en

internal/crud/utils.go

@@ -0,0 +1,24 @@
+package crud
+
+import (
+	"fmt"
+	"strings"
+)
+
+func ValidateName(name string) error {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return fmt.Errorf("name cannot be empty")
+	}
+	if len(name) > 100 {
+		return fmt.Errorf("name cannot exceed 100 characters")
+	}
+	return nil
+}
+
+func ValidateID(id int64) error {
+	if id <= 0 {
+		return fmt.Errorf("ID must be positive")
+	}
+	return nil
+}

internal/crud/utils_test.go

@@ -0,0 +1,48 @@
+package crud
+
+import "testing"
+
+func TestValidateName(t *testing.T) {
+	tests := []struct {
+		name  string
+		valid bool
+	}{
+		{"valid-name", true},
+		{"", false},
+		{"   ", false},
+		{string(make([]byte, 101)), false},
+		{"normal name", true},
+	}
+
+	for _, test := range tests {
+		err := ValidateName(test.name)
+		if test.valid && err != nil {
+			t.Errorf("expected %q to be valid, got error: %v", test.name, err)
+		}
+		if !test.valid && err == nil {
+			t.Errorf("expected %q to be invalid, got no error", test.name)
+		}
+	}
+}
+
+func TestValidateID(t *testing.T) {
+	tests := []struct {
+		id    int64
+		valid bool
+	}{
+		{1, true},
+		{100, true},
+		{0, false},
+		{-1, false},
+	}
+
+	for _, test := range tests {
+		err := ValidateID(test.id)
+		if test.valid && err != nil {
+			t.Errorf("expected ID %d to be valid, got error: %v", test.id, err)
+		}
+		if !test.valid && err == nil {
+			t.Errorf("expected ID %d to be invalid, got no error", test.id)
+		}
+	}
+}