package db

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func AssertForeignKeyError[T ForeignKey](t *testing.T, err error, field string, val T) {
	t.Helper()

	var fkErr ForeignKeyError[T]
	require.Error(t, err)
	require.ErrorIs(t, err, ErrForeignKeyViolation)
	// ErrorAs produces terrible error messages if it's a ForeignKeyError with a different type
	// parameter (i.e., if it was a different field that failed).
	require.ErrorAs(t, err, &fkErr, "expected error field: %q", field)
	assert.Equal(t, field, fkErr.Field)
	assert.Equal(t, val, fkErr.FkValue)
}