fix: ensure users imported from LDAP have fields validated (#923)

backend/internal/dto/user_dto_test.go

@@ -0,0 +1,89 @@
+package dto
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestUserCreateDto_Validate(t *testing.T) {
+	testCases := []struct {
+		name    string
+		input   UserCreateDto
+		wantErr string
+	}{
+		{
+			name: "valid input",
+			input: UserCreateDto{
+				Username:  "testuser",
+				Email:     "test@example.com",
+				FirstName: "John",
+				LastName:  "Doe",
+			},
+			wantErr: "",
+		},
+		{
+			name: "missing username",
+			input: UserCreateDto{
+				Email:     "test@example.com",
+				FirstName: "John",
+				LastName:  "Doe",
+			},
+			wantErr: "Field validation for 'Username' failed on the 'required' tag",
+		},
+		{
+			name: "username contains invalid characters",
+			input: UserCreateDto{
+				Username:  "test/ser",
+				Email:     "test@example.com",
+				FirstName: "John",
+				LastName:  "Doe",
+			},
+			wantErr: "Field validation for 'Username' failed on the 'username' tag",
+		},
+		{
+			name: "invalid email",
+			input: UserCreateDto{
+				Username:  "testuser",
+				Email:     "not-an-email",
+				FirstName: "John",
+				LastName:  "Doe",
+			},
+			wantErr: "Field validation for 'Email' failed on the 'email' tag",
+		},
+		{
+			name: "first name too short",
+			input: UserCreateDto{
+				Username:  "testuser",
+				Email:     "test@example.com",
+				FirstName: "",
+				LastName:  "Doe",
+			},
+			wantErr: "Field validation for 'FirstName' failed on the 'required' tag",
+		},
+		{
+			name: "last name too long",
+			input: UserCreateDto{
+				Username:  "testuser",
+				Email:     "test@example.com",
+				FirstName: "John",
+				LastName:  "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz",
+			},
+			wantErr: "Field validation for 'LastName' failed on the 'max' tag",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.input.Validate()
+
+			if tc.wantErr == "" {
+				require.NoError(t, err)
+				return
+			}
+
+			require.Error(t, err)
+			require.ErrorContains(t, err, tc.wantErr)
+		})
+	}
+}