// Copyright 2014 The Gogs Authors. All rights reserved.// Copyright 2019 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package gitdiff import (	"strconv"	"strings"	"testing" 	"forgejo.org/models/db"	issues_model "forgejo.org/models/issues"	"forgejo.org/models/unittest"	user_model "forgejo.org/models/user"	"forgejo.org/modules/git"	"forgejo.org/modules/json"	"forgejo.org/modules/setting" 	dmp "github.com/sergi/go-diff/diffmatchpatch"	"github.com/stretchr/testify/assert"	"github.com/stretchr/testify/require") func TestDiffToHTML(t *testing.T) {	assert.Equal(t, "foo <span class=\"added-code\">bar</span> biz", diffToHTML(nil, []dmp.Diff{		{Type: dmp.DiffEqual, Text: "foo "},		{Type: dmp.DiffInsert, Text: "bar"},		{Type: dmp.DiffDelete, Text: " baz"},		{Type: dmp.DiffEqual, Text: " biz"},	}, DiffLineAdd)) 	assert.Equal(t, "foo <span class=\"removed-code\">bar</span> biz", diffToHTML(nil, []dmp.Diff{		{Type: dmp.DiffEqual, Text: "foo "},		{Type: dmp.DiffDelete, Text: "bar"},		{Type: dmp.DiffInsert, Text: " baz"},		{Type: dmp.DiffEqual, Text: " biz"},	}, DiffLineDel))} func TestParsePatch_skipTo(t *testing.T) {	type testcase struct {		name        string		gitdiff     string		wantErr     bool		addition    int		deletion    int		oldFilename string		filename    string		skipTo      string	}	tests := []testcase{		{			name: "readme.md2readme.md",			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 offdiff --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",			skipTo:      "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",			skipTo:      "A \\ B",		},		{			name: "A \\ B",			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 offdiff --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",			skipTo:      "A \\ B",		},		{			name: "readme.md2readme.md",			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 offdiff --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 offdiff --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",			skipTo:      "README.md",		},	}	for _, testcase := range tests {		t.Run(testcase.name, func(t *testing.T) {			got, err := ParsePatch(db.DefaultContext, setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), testcase.skipTo)			if (err != nil) != testcase.wantErr {				t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)				return			} 			gotMarshaled, _ := json.MarshalIndent(got, "", "  ")			if got.NumFiles != 1 {				t.Errorf("ParsePath(%q) did not receive 1 file:\n%s", testcase.name, string(gotMarshaled))				return			}			if got.TotalAddition != testcase.addition {				t.Errorf("ParsePath(%q) does not have correct totalAddition %d, wanted %d", testcase.name, got.TotalAddition, testcase.addition)			}			if got.TotalDeletion != testcase.deletion {				t.Errorf("ParsePath(%q) did not have correct totalDeletion %d, wanted %d", testcase.name, got.TotalDeletion, testcase.deletion)			}			file := got.Files[0]			if file.Addition != testcase.addition {				t.Errorf("ParsePath(%q) does not have correct file addition %d, wanted %d", testcase.name, file.Addition, testcase.addition)			}			if file.Deletion != testcase.deletion {				t.Errorf("ParsePath(%q) did not have correct file deletion %d, wanted %d", testcase.name, file.Deletion, testcase.deletion)			}			if file.OldName != testcase.oldFilename {				t.Errorf("ParsePath(%q) did not have correct OldName %q, wanted %q", testcase.name, file.OldName, testcase.oldFilename)			}			if file.Name != testcase.filename {				t.Errorf("ParsePath(%q) did not have correct Name %q, wanted %q", testcase.name, file.Name, testcase.filename)			}		})	}} 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 100644index 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/filerename 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: "ambiguous deleted",			gitdiff: `diff --git a/b b/b b/b b/bdeleted file mode 100644index 92e798b..0000000--- a/b b/b` + "\t" + `+++ /dev/null@@ -1 +0,0 @@-b b/b`,			oldFilename: "b b/b",			filename:    "b b/b",			addition:    0,			deletion:    1,		},		{			name: "ambiguous addition",			gitdiff: `diff --git a/b b/b b/b b/bnew file mode 100644index 0000000..92e798b--- /dev/null+++ b/b b/b` + "\t" + `@@ -0,0 +1 @@+b b/b`,			oldFilename: "b b/b",			filename:    "b b/b",			addition:    1,			deletion:    0,		},		{			name: "rename",			gitdiff: `diff --git a/b b/b b/b b/b b/b b/bsimilarity index 100%rename from b b/b b/b b/b b/brename to b`,			oldFilename: "b b/b b/b b/b b/b",			filename:    "b",		},		{			name: "ambiguous 1",			gitdiff: `diff --git a/b b/b b/b b/b b/b b/bsimilarity index 100%rename from b b/b b/b b/b b/brename to b`,			oldFilename: "b b/b b/b b/b b/b",			filename:    "b",		},		{			name: "ambiguous 2",			gitdiff: `diff --git a/b b/b b/b b/b b/b b/bsimilarity index 100%rename from b b/b b/b b/brename to b b/b`,			oldFilename: "b b/b b/b b/b",			filename:    "b b/b",		},		{			name: "minuses-and-pluses",			gitdiff: `diff --git a/minuses-and-pluses b/minuses-and-plusesindex 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(db.DefaultContext, setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), "")			if (err != nil) != testcase.wantErr {				t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)				return			} 			gotMarshaled, _ := json.MarshalIndent(got, "", "  ")			if got.NumFiles != 1 {				t.Errorf("ParsePath(%q) did not receive 1 file:\n%s", testcase.name, string(gotMarshaled))				return			}			if got.TotalAddition != testcase.addition {				t.Errorf("ParsePath(%q) does not have correct totalAddition %d, wanted %d", testcase.name, got.TotalAddition, testcase.addition)			}			if got.TotalDeletion != testcase.deletion {				t.Errorf("ParsePath(%q) did not have correct totalDeletion %d, wanted %d", testcase.name, got.TotalDeletion, testcase.deletion)			}			file := got.Files[0]			if file.Addition != testcase.addition {				t.Errorf("ParsePath(%q) does not have correct file addition %d, wanted %d", testcase.name, file.Addition, testcase.addition)			}			if file.Deletion != testcase.deletion {				t.Errorf("ParsePath(%q) did not have correct file deletion %d, wanted %d", testcase.name, file.Deletion, testcase.deletion)			}			if file.OldName != testcase.oldFilename {				t.Errorf("ParsePath(%q) did not have correct OldName %q, wanted %q", testcase.name, file.OldName, testcase.oldFilename)			}			if file.Name != testcase.filename {				t.Errorf("ParsePath(%q) did not have correct Name %q, wanted %q", testcase.name, file.Name, testcase.filename)			}		})	} 	// Test max lines	diffBuilder := &strings.Builder{} 	diff := `diff --git a/newfile2 b/newfile2new file mode 100644index 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(db.DefaultContext, 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(db.DefaultContext, 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(db.DefaultContext, 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/newfile2new file mode 100644index 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(db.DefaultContext, 20, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")	if err != nil {		t.Errorf("There should not be an error: %v", err)	}

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