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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package gitdiff
import (
"fmt"
"strings"
"testing"
"github.com/sergi/go-diff/diffmatchpatch"
"github.com/stretchr/testify/assert"
)
func TestDiffWithHighlight(t *testing.T) {
hcd := NewHighlightCodeDiff()
diffs := hcd.diffWithHighlight(
"main.v", "",
" run('<>')\n",
" run(db)\n",
)
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>`
output := diffToHTML(nil, diffs, DiffLineDel)
assert.Equal(t, expected, output)
expected = ` <span class="n">run</span><span class="o">(</span><span class="added-code"><span class="n">db</span></span><span class="o">)</span>`
output = diffToHTML(nil, diffs, DiffLineAdd)
assert.Equal(t, expected, output)
hcd = NewHighlightCodeDiff()
hcd.PlaceholderTokenMap['O'] = "<span>"
hcd.PlaceholderTokenMap['C'] = "</span>"
diff := diffmatchpatch.Diff{}
diff.Text = "OC"
hcd.recoverOneDiff(&diff)
assert.Equal(t, "<span></span>", diff.Text)
diff.Text = "O"
hcd.recoverOneDiff(&diff)
assert.Equal(t, "<span></span>", diff.Text)
diff.Text = "C"
hcd.recoverOneDiff(&diff)
assert.Equal(t, "", diff.Text)
}
func TestDiffWithHighlightPlaceholder(t *testing.T) {
hcd := NewHighlightCodeDiff()
diffs := hcd.diffWithHighlight(
"main.js", "",
"a='\U00100000'",
"a='\U0010FFFD''",
)
assert.Equal(t, "", hcd.PlaceholderTokenMap[0x00100000])
assert.Equal(t, "", hcd.PlaceholderTokenMap[0x0010FFFD])
expected := fmt.Sprintf(`<span class="nx">a</span><span class="o">=</span><span class="s1">'</span><span class="removed-code">%s</span>'`, "\U00100000")
output := diffToHTML(hcd.lineWrapperTags, diffs, DiffLineDel)
assert.Equal(t, expected, output)
hcd = NewHighlightCodeDiff()
diffs = hcd.diffWithHighlight(
"main.js", "",
"a='\U00100000'",
"a='\U0010FFFD'",
)
expected = fmt.Sprintf(`<span class="nx">a</span><span class="o">=</span><span class="s1">'</span><span class="added-code">%s</span>'`, "\U0010FFFD")
output = diffToHTML(nil, diffs, DiffLineAdd)
assert.Equal(t, expected, output)
}
func TestDiffWithHighlightPlaceholderExhausted(t *testing.T) {
hcd := NewHighlightCodeDiff()
hcd.placeholderMaxCount = 0
diffs := hcd.diffWithHighlight(
"main.js", "",
"'",
``,
)
output := diffToHTML(nil, diffs, DiffLineDel)
expected := fmt.Sprintf(`<span class="removed-code">%s#39;</span>`, "\uFFFD")
assert.Equal(t, expected, output)
hcd = NewHighlightCodeDiff()
hcd.placeholderMaxCount = 0
diffs = hcd.diffWithHighlight(
"main.js", "",
"a < b",
"a > b",
)
output = diffToHTML(nil, diffs, DiffLineDel)
expected = fmt.Sprintf(`a %s<span class="removed-code">l</span>t; b`, "\uFFFD")
assert.Equal(t, expected, output)
output = diffToHTML(nil, diffs, DiffLineAdd)
expected = fmt.Sprintf(`a %s<span class="added-code">g</span>t; b`, "\uFFFD")
assert.Equal(t, expected, output)
}
func TestDiffWithHighlightTagMatch(t *testing.T) {
totalOverflow := 0
for i := 0; i < 100; i++ {
hcd := NewHighlightCodeDiff()
hcd.placeholderMaxCount = i
diffs := hcd.diffWithHighlight(
"main.js", "",
"a='1'",
"b='2'",
)
totalOverflow += hcd.placeholderOverflowCount
output := diffToHTML(nil, diffs, DiffLineDel)
c1 := strings.Count(output, "<span")
c2 := strings.Count(output, "</span")
assert.Equal(t, c1, c2)
output = diffToHTML(nil, diffs, DiffLineAdd)
c1 = strings.Count(output, "<span")
c2 = strings.Count(output, "</span")
assert.Equal(t, c1, c2)
}
assert.NotZero(t, totalOverflow)
}
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