mirror of
https://github.com/go-gitea/gitea.git
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3310dd1d19
Use Unicode placeholders to replace HTML tags and HTML entities first, then do diff, then recover the HTML tags and HTML entities. Now the code diff with highlight has stable behavior, and won't emit broken tags.
127 lines
3.8 KiB
Go
127 lines
3.8 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package gitdiff
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/sergi/go-diff/diffmatchpatch"
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"github.com/stretchr/testify/assert"
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)
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func TestDiffWithHighlight(t *testing.T) {
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hcd := newHighlightCodeDiff()
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diffs := hcd.diffWithHighlight(
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"main.v", "",
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" run('<>')\n",
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" run(db)\n",
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)
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expected := ` <span class="n">run</span><span class="o">(</span><span class="removed-code"><span class="k">'</span><span class="o"><</span><span class="o">></span><span class="k">'</span></span><span class="o">)</span>` + "\n"
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output := diffToHTML(nil, diffs, DiffLineDel)
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assert.Equal(t, expected, output)
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expected = ` <span class="n">run</span><span class="o">(</span><span class="added-code"><span class="n">db</span></span><span class="o">)</span>` + "\n"
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output = diffToHTML(nil, diffs, DiffLineAdd)
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assert.Equal(t, expected, output)
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hcd = newHighlightCodeDiff()
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hcd.placeholderTokenMap['O'] = "<span>"
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hcd.placeholderTokenMap['C'] = "</span>"
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diff := diffmatchpatch.Diff{}
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diff.Text = "OC"
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hcd.recoverOneDiff(&diff)
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assert.Equal(t, "<span></span>", diff.Text)
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diff.Text = "O"
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hcd.recoverOneDiff(&diff)
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assert.Equal(t, "<span></span>", diff.Text)
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diff.Text = "C"
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hcd.recoverOneDiff(&diff)
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assert.Equal(t, "", diff.Text)
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}
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func TestDiffWithHighlightPlaceholder(t *testing.T) {
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hcd := newHighlightCodeDiff()
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diffs := hcd.diffWithHighlight(
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"main.js", "",
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"a='\U00100000'",
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"a='\U0010FFFD''",
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)
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assert.Equal(t, "", hcd.placeholderTokenMap[0x00100000])
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assert.Equal(t, "", hcd.placeholderTokenMap[0x0010FFFD])
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expected := fmt.Sprintf(`<span class="line"><span class="cl"><span class="nx">a</span><span class="o">=</span><span class="s1">'</span><span class="removed-code">%s</span>'</span></span>`, "\U00100000")
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output := diffToHTML(hcd.lineWrapperTags, diffs, DiffLineDel)
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assert.Equal(t, expected, output)
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hcd = newHighlightCodeDiff()
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diffs = hcd.diffWithHighlight(
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"main.js", "",
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"a='\U00100000'",
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"a='\U0010FFFD'",
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)
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expected = fmt.Sprintf(`<span class="nx">a</span><span class="o">=</span><span class="s1">'</span><span class="added-code">%s</span>'`, "\U0010FFFD")
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output = diffToHTML(nil, diffs, DiffLineAdd)
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assert.Equal(t, expected, output)
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}
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func TestDiffWithHighlightPlaceholderExhausted(t *testing.T) {
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hcd := newHighlightCodeDiff()
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hcd.placeholderMaxCount = 0
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diffs := hcd.diffWithHighlight(
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"main.js", "",
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"'",
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``,
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)
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output := diffToHTML(nil, diffs, DiffLineDel)
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expected := fmt.Sprintf(`<span class="removed-code">%s#39;</span>`, "\uFFFD")
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assert.Equal(t, expected, output)
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hcd = newHighlightCodeDiff()
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hcd.placeholderMaxCount = 0
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diffs = hcd.diffWithHighlight(
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"main.js", "",
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"a < b",
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"a > b",
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)
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output = diffToHTML(nil, diffs, DiffLineDel)
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expected = fmt.Sprintf(`a %s<span class="removed-code">l</span>t; b`, "\uFFFD")
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assert.Equal(t, expected, output)
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output = diffToHTML(nil, diffs, DiffLineAdd)
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expected = fmt.Sprintf(`a %s<span class="added-code">g</span>t; b`, "\uFFFD")
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assert.Equal(t, expected, output)
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}
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func TestDiffWithHighlightTagMatch(t *testing.T) {
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totalOverflow := 0
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for i := 0; i < 100; i++ {
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hcd := newHighlightCodeDiff()
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hcd.placeholderMaxCount = i
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diffs := hcd.diffWithHighlight(
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"main.js", "",
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"a='1'",
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"b='2'",
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)
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totalOverflow += hcd.placeholderOverflowCount
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output := diffToHTML(nil, diffs, DiffLineDel)
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c1 := strings.Count(output, "<span")
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c2 := strings.Count(output, "</span")
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assert.Equal(t, c1, c2)
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output = diffToHTML(nil, diffs, DiffLineAdd)
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c1 = strings.Count(output, "<span")
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c2 = strings.Count(output, "</span")
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assert.Equal(t, c1, c2)
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}
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assert.NotZero(t, totalOverflow)
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}
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