// Copyright 2025 The Forgejo Authors. All rights reserved.// SPDX-License-Identifier: GPL-3.0-or-later package markup import (	"bytes"	"errors"	"strings"	"testing" 	"forgejo.org/modules/test" 	"github.com/stretchr/testify/assert"	"github.com/stretchr/testify/require") type failReader struct{} func (*failReader) Read(p []byte) (n int, err error) {	return 0, errors.New("FAIL")} func TestRender_postProcessOrCopy(t *testing.T) {	renderContext := &RenderContext{Ctx: t.Context()} 	t.Run("CopyOK", func(t *testing.T) {		input := "SOMETHING"		output := &bytes.Buffer{}		require.NoError(t, postProcessOrCopy(renderContext, nil, strings.NewReader(input), output))		assert.Equal(t, input, output.String())	}) 	renderer := GetRendererByType("markdown") 	t.Run("PostProcessOK", func(t *testing.T) {		input := "SOMETHING"		output := &bytes.Buffer{}		defer test.MockVariableValue(&defaultProcessors, []processor{})()		require.NoError(t, postProcessOrCopy(renderContext, renderer, strings.NewReader(input), output))		assert.Equal(t, input, output.String())	}) 	t.Run("PostProcessError", func(t *testing.T) {		input := &failReader{}		defer test.MockVariableValue(&defaultProcessors, []processor{})()		assert.ErrorContains(t, postProcessOrCopy(renderContext, renderer, input, &bytes.Buffer{}), "FAIL")	})}