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7ab6c77b41
gitea/services/gitdiff/gitdiff_test.go
zeripath beb2058186
Fix broken spans in diffs (#14678) 
Gitea runs diff on highlighted code fragment for each line in order to provide
code highlight diffs. Unfortunately this diff algorithm is not aware that span tags
and entities are atomic and cannot be split.

The current fixup code makes some attempt to fix these broken tags however, it cannot
handle situations where a tag is split over multiple blocks.

This PR provides a more algorithmic fixup mechanism whereby spans and entities are
completely coalesced into their respective blocks.

This may result in a incompletely reduced diff but - it will definitely prevent the
broken entities and spans that are currently possible.

As a result of this fixup several inconsistencies were discovered in our testcases
and these were also fixed.

Fix #14231

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-02-14 15:51:00 +01:00

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// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package gitdiff
import (
"encoding/json"
"fmt"
"html/template"
"strconv"
"strings"
"testing"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/highlight"
"code.gitea.io/gitea/modules/setting"
dmp "github.com/sergi/go-diff/diffmatchpatch"
"github.com/stretchr/testify/assert"
"gopkg.in/ini.v1"
)
func assertEqual(t *testing.T, s1 string, s2 template.HTML) {
if s1 != string(s2) {
t.Errorf("Did not receive expected results:\nExpected: %s\nActual: %s", s1, s2)
}
}
func TestDiffToHTML(t *testing.T) {
setting.Cfg = ini.Empty()
assertEqual(t, "foo <span class=\"added-code\">bar</span> biz", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "foo "},
{Type: dmp.DiffInsert, Text: "bar"},
{Type: dmp.DiffDelete, Text: " baz"},
{Type: dmp.DiffEqual, Text: " biz"},
}, DiffLineAdd))
assertEqual(t, "foo <span class=\"removed-code\">bar</span> biz", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "foo "},
{Type: dmp.DiffDelete, Text: "bar"},
{Type: dmp.DiffInsert, Text: " baz"},
{Type: dmp.DiffEqual, Text: " biz"},
}, DiffLineDel))
assertEqual(t, "<span class=\"k\">if</span> <span class=\"p\">!</span><span class=\"nx\">nohl</span> <span class=\"o\">&amp;&amp;</span> <span class=\"added-code\"><span class=\"p\">(</span></span><span class=\"nx\">lexer</span> <span class=\"o\">!=</span> <span class=\"kc\">nil</span><span class=\"added-code\"> <span class=\"o\">||</span> <span class=\"nx\">r</span><span class=\"p\">.</span><span class=\"nx\">GuessLanguage</span><span class=\"p\">)</span></span> <span class=\"p\">{</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "<span class=\"k\">if</span> <span class=\"p\">!</span><span class=\"nx\">nohl</span> <span class=\"o\">&amp;&amp;</span> <span class=\""},
{Type: dmp.DiffInsert, Text: "p\">(</span><span class=\""},
{Type: dmp.DiffEqual, Text: "nx\">lexer</span> <span class=\"o\">!=</span> <span class=\"kc\">nil"},
{Type: dmp.DiffInsert, Text: "</span> <span class=\"o\">||</span> <span class=\"nx\">r</span><span class=\"p\">.</span><span class=\"nx\">GuessLanguage</span><span class=\"p\">)"},
{Type: dmp.DiffEqual, Text: "</span> <span class=\"p\">{</span>"},
}, DiffLineAdd))
assertEqual(t, "<span class=\"nx\">tagURL</span> <span class=\"o\">:=</span> <span class=\"removed-code\"><span class=\"nx\">fmt</span><span class=\"p\">.</span><span class=\"nf\">Sprintf</span><span class=\"p\">(</span><span class=\"s\">&#34;## [%s](%s/%s/%s/%s?q=&amp;type=all&amp;state=closed&amp;milestone=%d) - %s&#34;</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">Milestone\"</span></span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">BaseURL</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">Owner</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">Repo</span><span class=\"p\">,</span> <span class=\"removed-code\"><span class=\"nx\">from</span><span class=\"p\">,</span> <span class=\"nx\">milestoneID</span><span class=\"p\">,</span> <span class=\"nx\">time</span><span class=\"p\">.</span><span class=\"nf\">Now</span><span class=\"p\">(</span><span class=\"p\">)</span><span class=\"p\">.</span><span class=\"nf\">Format</span><span class=\"p\">(</span><span class=\"s\">&#34;2006-01-02&#34;</span><span class=\"p\">)</span></span><span class=\"p\">)</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "<span class=\"nx\">tagURL</span> <span class=\"o\">:=</span> <span class=\"n"},
{Type: dmp.DiffDelete, Text: "x\">fmt</span><span class=\"p\">.</span><span class=\"nf\">Sprintf</span><span class=\"p\">(</span><span class=\"s\">&#34;## [%s](%s/%s/%s/%s?q=&amp;type=all&amp;state=closed&amp;milestone=%d) - %s&#34;</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">Milestone\""},
{Type: dmp.DiffInsert, Text: "f\">getGiteaTagURL</span><span class=\"p\">(</span><span class=\"nx\">client"},
{Type: dmp.DiffEqual, Text: "</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">BaseURL</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">Owner</span><span class=\"p\">,</span> <span class=\"nx\">ge</span><span class=\"p\">.</span><span class=\"nx\">Repo</span><span class=\"p\">,</span> <span class=\"nx\">"},
{Type: dmp.DiffDelete, Text: "from</span><span class=\"p\">,</span> <span class=\"nx\">milestoneID</span><span class=\"p\">,</span> <span class=\"nx\">time</span><span class=\"p\">.</span><span class=\"nf\">Now</span><span class=\"p\">(</span><span class=\"p\">)</span><span class=\"p\">.</span><span class=\"nf\">Format</span><span class=\"p\">(</span><span class=\"s\">&#34;2006-01-02&#34;</span><span class=\"p\">)"},
{Type: dmp.DiffInsert, Text: "ge</span><span class=\"p\">.</span><span class=\"nx\">Milestone</span><span class=\"p\">,</span> <span class=\"nx\">from</span><span class=\"p\">,</span> <span class=\"nx\">milestoneID"},
{Type: dmp.DiffEqual, Text: "</span><span class=\"p\">)</span>"},
}, DiffLineDel))
assertEqual(t, "<span class=\"nx\">r</span><span class=\"p\">.</span><span class=\"nf\">WrapperRenderer</span><span class=\"p\">(</span><span class=\"nx\">w</span><span class=\"p\">,</span> <span class=\"removed-code\"><span class=\"nx\">language</span><span class=\"p\">,</span> <span class=\"kc\">true</span><span class=\"p\">,</span> <span class=\"nx\">attrs</span></span><span class=\"p\">,</span> <span class=\"kc\">false</span><span class=\"p\">)</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "<span class=\"nx\">r</span><span class=\"p\">.</span><span class=\"nf\">WrapperRenderer</span><span class=\"p\">(</span><span class=\"nx\">w</span><span class=\"p\">,</span> <span class=\"nx\">"},
{Type: dmp.DiffDelete, Text: "language</span><span "},
{Type: dmp.DiffEqual, Text: "c"},
{Type: dmp.DiffDelete, Text: "lass=\"p\">,</span> <span class=\"kc\">true</span><span class=\"p\">,</span> <span class=\"nx\">attrs"},
{Type: dmp.DiffEqual, Text: "</span><span class=\"p\">,</span> <span class=\"kc\">false</span><span class=\"p\">)</span>"},
}, DiffLineDel))
assertEqual(t, "<span class=\"added-code\">language</span><span class=\"p\">,</span> <span class=\"kc\">true</span><span class=\"p\">,</span> <span class=\"nx\">attrs</span></span><span class=\"p\">,</span> <span class=\"kc\">false</span><span class=\"p\">)</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffInsert, Text: "language</span><span "},
{Type: dmp.DiffEqual, Text: "c"},
{Type: dmp.DiffInsert, Text: "lass=\"p\">,</span> <span class=\"kc\">true</span><span class=\"p\">,</span> <span class=\"nx\">attrs"},
{Type: dmp.DiffEqual, Text: "</span><span class=\"p\">,</span> <span class=\"kc\">false</span><span class=\"p\">)</span>"},
}, DiffLineAdd))
assertEqual(t, "<span class=\"k\">print</span><span class=\"added-code\"><span class=\"p\">(</span></span><span class=\"sa\"></span><span class=\"s2\">&#34;</span><span class=\"s2\">// </span><span class=\"s2\">&#34;</span><span class=\"p\">,</span> <span class=\"n\">sys</span><span class=\"o\">.</span><span class=\"n\">argv</span><span class=\"added-code\"><span class=\"p\">)</span></span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "<span class=\"k\">print</span>"},
{Type: dmp.DiffInsert, Text: "<span"},
{Type: dmp.DiffEqual, Text: " "},
{Type: dmp.DiffInsert, Text: "class=\"p\">(</span>"},
{Type: dmp.DiffEqual, Text: "<span class=\"sa\"></span><span class=\"s2\">&#34;</span><span class=\"s2\">// </span><span class=\"s2\">&#34;</span><span class=\"p\">,</span> <span class=\"n\">sys</span><span class=\"o\">.</span><span class=\"n\">argv</span>"},
{Type: dmp.DiffInsert, Text: "<span class=\"p\">)</span>"},
}, DiffLineAdd))
assertEqual(t, "sh <span class=\"added-code\">&#39;useradd -u $(stat -c &#34;%u&#34; .gitignore) jenkins&#39;</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "sh &#3"},
{Type: dmp.DiffDelete, Text: "4;useradd -u 111 jenkins&#34"},
{Type: dmp.DiffInsert, Text: "9;useradd -u $(stat -c &#34;%u&#34; .gitignore) jenkins&#39"},
{Type: dmp.DiffEqual, Text: ";"},
}, DiffLineAdd))
assertEqual(t, "<span class=\"x\"> &lt;h<span class=\"added-code\">4 class=&#34;release-list-title df ac&#34;</span>&gt;</span>", diffToHTML("", []dmp.Diff{
{Type: dmp.DiffEqual, Text: "<span class=\"x\"> &lt;h"},
{Type: dmp.DiffInsert, Text: "4 class=&#"},
{Type: dmp.DiffEqual, Text: "3"},
{Type: dmp.DiffInsert, Text: "4;release-list-title df ac&#34;"},
{Type: dmp.DiffEqual, Text: "&gt;</span>"},
}, DiffLineAdd))
}
func TestParsePatch_singlefile(t *testing.T) {
type testcase struct {
name string
gitdiff string
wantErr bool
addition int
deletion int
oldFilename string
filename string
}
tests := []testcase{
{
name: "readme.md2readme.md",
gitdiff: `diff --git "\\a/README.md" "\\b/README.md"
--- "\\a/README.md"
+++ "\\b/README.md"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
`,
addition: 4,
deletion: 1,
filename: "README.md",
oldFilename: "README.md",
},
{
name: "A \\ B",
gitdiff: `diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`,
addition: 4,
deletion: 1,
filename: "A \\ B",
oldFilename: "A \\ B",
},
{
name: "really weird filename",
gitdiff: `diff --git "\\a/a b/file b/a a/file" "\\b/a b/file b/a a/file"
index d2186f1..f5c8ed2 100644
--- "\\a/a b/file b/a a/file" ` + `
+++ "\\b/a b/file b/a a/file" ` + `
@@ -1,3 +1,2 @@
Create a weird file.
` + `
-and what does diff do here?
\ No newline at end of file`,
addition: 0,
deletion: 1,
filename: "a b/file b/a a/file",
oldFilename: "a b/file b/a a/file",
},
{
name: "delete file with blanks",
gitdiff: `diff --git "\\a/file with blanks" "\\b/file with blanks"
deleted file mode 100644
index 898651a..0000000
--- "\\a/file with blanks" ` + `
+++ /dev/null
@@ -1,5 +0,0 @@
-a blank file
-
-has a couple o line
-
-the 5th line is the last
`,
addition: 0,
deletion: 5,
filename: "file with blanks",
oldFilename: "file with blanks",
},
{
name: "rename a—as",
gitdiff: `diff --git "a/\360\243\220\265b\342\200\240vs" "b/a\342\200\224as"
similarity index 100%
rename from "\360\243\220\265b\342\200\240vs"
rename to "a\342\200\224as"
`,
addition: 0,
deletion: 0,
oldFilename: "𣐵b†vs",
filename: "a—as",
},
{
name: "rename with spaces",
gitdiff: `diff --git "\\a/a b/file b/a a/file" "\\b/a b/a a/file b/b file"
similarity index 100%
rename from a b/file b/a a/file
rename to a b/a a/file b/b file
`,
oldFilename: "a b/file b/a a/file",
filename: "a b/a a/file b/b file",
},
{
name: "minuses-and-pluses",
gitdiff: `diff --git a/minuses-and-pluses b/minuses-and-pluses
index 6961180..9ba1a00 100644
--- a/minuses-and-pluses
+++ b/minuses-and-pluses
@@ -1,4 +1,4 @@
--- 1st line
-++ 2nd line
--- 3rd line
-++ 4th line
+++ 1st line
+-- 2nd line
+++ 3rd line
+-- 4th line
`,
oldFilename: "minuses-and-pluses",
filename: "minuses-and-pluses",
addition: 4,
deletion: 4,
},
}
for _, testcase := range tests {
t.Run(testcase.name, func(t *testing.T) {
got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff))
if (err != nil) != testcase.wantErr {
t.Errorf("ParsePatch() error = %v, wantErr %v", err, testcase.wantErr)
return
}
gotMarshaled, _ := json.MarshalIndent(got, " ", " ")
if got.NumFiles != 1 {
t.Errorf("ParsePath() did not receive 1 file:\n%s", string(gotMarshaled))
return
}
if got.TotalAddition != testcase.addition {
t.Errorf("ParsePath() does not have correct totalAddition %d, wanted %d", got.TotalAddition, testcase.addition)
}
if got.TotalDeletion != testcase.deletion {
t.Errorf("ParsePath() did not have correct totalDeletion %d, wanted %d", got.TotalDeletion, testcase.deletion)
}
file := got.Files[0]
if file.Addition != testcase.addition {
t.Errorf("ParsePath() does not have correct file addition %d, wanted %d", file.Addition, testcase.addition)
}
if file.Deletion != testcase.deletion {
t.Errorf("ParsePath() did not have correct file deletion %d, wanted %d", file.Deletion, testcase.deletion)
}
if file.OldName != testcase.oldFilename {
t.Errorf("ParsePath() did not have correct OldName %s, wanted %s", file.OldName, testcase.oldFilename)
}
if file.Name != testcase.filename {
t.Errorf("ParsePath() did not have correct Name %s, wanted %s", file.Name, testcase.filename)
}
})
}
// Test max lines
diffBuilder := &strings.Builder{}
var diff = `diff --git a/newfile2 b/newfile2
new file mode 100644
index 0000000..6bb8f39
--- /dev/null
+++ b/newfile2
@@ -0,0 +1,35 @@
`
diffBuilder.WriteString(diff)
for i := 0; i < 35; i++ {
diffBuilder.WriteString("+line" + strconv.Itoa(i) + "\n")
}
diff = diffBuilder.String()
result, err := ParsePatch(20, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if !result.Files[0].IsIncomplete {
t.Errorf("Files should be incomplete! %v", result.Files[0])
}
result, err = ParsePatch(40, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if result.Files[0].IsIncomplete {
t.Errorf("Files should not be incomplete! %v", result.Files[0])
}
result, err = ParsePatch(40, 5, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if !result.Files[0].IsIncomplete {
t.Errorf("Files should be incomplete! %v", result.Files[0])
}
// Test max characters
diff = `diff --git a/newfile2 b/newfile2
new file mode 100644
index 0000000..6bb8f39
--- /dev/null
+++ b/newfile2
@@ -0,0 +1,35 @@
`
diffBuilder.Reset()
diffBuilder.WriteString(diff)
for i := 0; i < 33; i++ {
diffBuilder.WriteString("+line" + strconv.Itoa(i) + "\n")
}
diffBuilder.WriteString("+line33")
for i := 0; i < 512; i++ {
diffBuilder.WriteString("0123456789ABCDEF")
}
diffBuilder.WriteByte('\n')
diffBuilder.WriteString("+line" + strconv.Itoa(34) + "\n")
diffBuilder.WriteString("+line" + strconv.Itoa(35) + "\n")
diff = diffBuilder.String()
result, err = ParsePatch(20, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if !result.Files[0].IsIncomplete {
t.Errorf("Files should be incomplete! %v", result.Files[0])
}
result, err = ParsePatch(40, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if !result.Files[0].IsIncomplete {
t.Errorf("Files should be incomplete! %v", result.Files[0])
}
diff = `diff --git "a/README.md" "b/README.md"
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
println(result)
var diff2 = `diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2))
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
println(result)
var diff2a = `diff --git "a/A \\ B" b/A/B
--- "a/A \\ B"
+++ b/A/B
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2a))
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
println(result)
var diff3 = `diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff3))
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
println(result)
}
func setupDefaultDiff() *Diff {
return &Diff{
Files: []*DiffFile{
{
Name: "README.md",
Sections: []*DiffSection{
{
Lines: []*DiffLine{
{
LeftIdx: 4,
RightIdx: 4,
},
},
},
},
},
},
}
}
func TestDiff_LoadComments(t *testing.T) {
assert.NoError(t, models.PrepareTestDatabase())
issue := models.AssertExistsAndLoadBean(t, &models.Issue{ID: 2}).(*models.Issue)
user := models.AssertExistsAndLoadBean(t, &models.User{ID: 1}).(*models.User)
diff := setupDefaultDiff()
assert.NoError(t, diff.LoadComments(issue, user))
assert.Len(t, diff.Files[0].Sections[0].Lines[0].Comments, 2)
}
func TestDiffLine_CanComment(t *testing.T) {
assert.False(t, (&DiffLine{Type: DiffLineSection}).CanComment())
assert.False(t, (&DiffLine{Type: DiffLineAdd, Comments: []*models.Comment{{Content: "bla"}}}).CanComment())
assert.True(t, (&DiffLine{Type: DiffLineAdd}).CanComment())
assert.True(t, (&DiffLine{Type: DiffLineDel}).CanComment())
assert.True(t, (&DiffLine{Type: DiffLinePlain}).CanComment())
}
func TestDiffLine_GetCommentSide(t *testing.T) {
assert.Equal(t, "previous", (&DiffLine{Comments: []*models.Comment{{Line: -3}}}).GetCommentSide())
assert.Equal(t, "proposed", (&DiffLine{Comments: []*models.Comment{{Line: 3}}}).GetCommentSide())
}
func TestGetDiffRangeWithWhitespaceBehavior(t *testing.T) {
git.Debug = true
for _, behavior := range []string{"-w", "--ignore-space-at-eol", "-b", ""} {
diffs, err := GetDiffRangeWithWhitespaceBehavior("./testdata/academic-module", "559c156f8e0178b71cb44355428f24001b08fc68", "bd7063cc7c04689c4d082183d32a604ed27a24f9",
setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffFiles, behavior)
assert.NoError(t, err, fmt.Sprintf("Error when diff with %s", behavior))
for _, f := range diffs.Files {
assert.True(t, len(f.Sections) > 0, fmt.Sprintf("%s should have sections", f.Name))
}
}
}
func TestDiffToHTML_14231(t *testing.T) {
setting.Cfg = ini.Empty()
diffRecord := diffMatchPatch.DiffMain(highlight.Code("main.v", " run()\n"), highlight.Code("main.v", " run(db)\n"), true)
diffRecord = diffMatchPatch.DiffCleanupEfficiency(diffRecord)
expected := ` <span class="n">run</span><span class="added-code"><span class="o">(</span><span class="n">db</span></span><span class="o">)</span>`
output := diffToHTML("main.v", diffRecord, DiffLineAdd)
assertEqual(t, expected, output)
}
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