first-commit

services/gitdiff/csv_test.go

@@ -0,0 +1,223 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package gitdiff
+
+import (
+	"encoding/csv"
+	"strings"
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	csv_module "code.gitea.io/gitea/modules/csv"
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCSVDiff(t *testing.T) {
+	cases := []struct {
+		diff  string
+		base  string
+		head  string
+		cells [][]TableDiffCellType
+	}{
+		// case 0 - initial commit of a csv
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -0,0 +1,2 @@
++col1,col2
++a,a`,
+			base: "",
+			head: `col1,col2
+a,a`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellAdd, TableDiffCellAdd},
+				{TableDiffCellAdd, TableDiffCellAdd},
+			},
+		},
+		// case 1 - adding 1 row at end
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,2 +1,3 @@
+ col1,col2
+-a,a
++a,a
++b,b`,
+			base: `col1,col2
+a,a`,
+			head: `col1,col2
+a,a
+b,b`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellUnchanged, TableDiffCellUnchanged},
+				{TableDiffCellUnchanged, TableDiffCellUnchanged},
+				{TableDiffCellAdd, TableDiffCellAdd},
+			},
+		},
+		// case 2 - row deleted
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,3 +1,2 @@
+ col1,col2
+-a,a
+ b,b`,
+			base: `col1,col2
+a,a
+b,b`,
+			head: `col1,col2
+b,b`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellUnchanged, TableDiffCellUnchanged},
+				{TableDiffCellDel, TableDiffCellDel},
+				{TableDiffCellUnchanged, TableDiffCellUnchanged},
+			},
+		},
+		// case 3 - row changed
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,2 +1,2 @@
+ col1,col2
+-b,b
++b,c`,
+			base: `col1,col2
+b,b`,
+			head: `col1,col2
+b,c`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellUnchanged, TableDiffCellUnchanged},
+				{TableDiffCellUnchanged, TableDiffCellChanged},
+			},
+		},
+		// case 4 - all deleted
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,2 +0,0 @@
+-col1,col2
+-b,c`,
+			base: `col1,col2
+b,c`,
+			head: "",
+			cells: [][]TableDiffCellType{
+				{TableDiffCellDel, TableDiffCellDel},
+				{TableDiffCellDel, TableDiffCellDel},
+			},
+		},
+		// case 5 - renames first column
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,3 +1,3 @@
+-col1,col2,col3
++cola,col2,col3
+ a,b,c`,
+			base: `col1,col2,col3
+a,b,c`,
+			head: `cola,col2,col3
+a,b,c`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellDel, TableDiffCellAdd, TableDiffCellUnchanged, TableDiffCellUnchanged},
+				{TableDiffCellDel, TableDiffCellAdd, TableDiffCellUnchanged, TableDiffCellUnchanged},
+			},
+		},
+		// case 6 - inserts a column after first, deletes last column
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,2 +1,2 @@
+-col1,col2,col3
+-a,b,c
++col1,col1a,col2
++a,d,b`,
+			base: `col1,col2,col3
+a,b,c`,
+			head: `col1,col1a,col2
+a,d,b`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellUnchanged, TableDiffCellAdd, TableDiffCellDel, TableDiffCellMovedUnchanged},
+				{TableDiffCellUnchanged, TableDiffCellAdd, TableDiffCellDel, TableDiffCellMovedUnchanged},
+			},
+		},
+		// case 7 - deletes first column, inserts column after last
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,2 +1,2 @@
+-col1,col2,col3
+-a,b,c
++col2,col3,col4
++b,c,d`,
+			base: `col1,col2,col3
+a,b,c`,
+			head: `col2,col3,col4
+b,c,d`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellDel, TableDiffCellUnchanged, TableDiffCellUnchanged, TableDiffCellAdd},
+				{TableDiffCellDel, TableDiffCellUnchanged, TableDiffCellUnchanged, TableDiffCellAdd},
+			},
+		},
+		// case 8 - two columns deleted, 2 added
+		{
+			diff: `diff --git a/unittest.csv b/unittest.csv
+--- a/unittest.csv
++++ b/unittest.csv
+@@ -1,2 +1,2 @@
+-col1,col2,col
+-a,b,c
++col3,col4,col5
++c,d,e`,
+			base: `col1,col2,col3
+a,b,c`,
+			head: `col3,col4,col5
+c,d,e`,
+			cells: [][]TableDiffCellType{
+				{TableDiffCellDel, TableDiffCellMovedUnchanged, TableDiffCellDel, TableDiffCellAdd, TableDiffCellAdd},
+				{TableDiffCellDel, TableDiffCellMovedUnchanged, TableDiffCellDel, TableDiffCellAdd, TableDiffCellAdd},
+			},
+		},
+	}
+
+	for n, c := range cases {
+		diff, err := ParsePatch(db.DefaultContext, setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(c.diff), "")
+		assert.NoError(t, err)
+
+		var baseReader *csv.Reader
+		if len(c.base) > 0 {
+			baseReader, err = csv_module.CreateReaderAndDetermineDelimiter(nil, strings.NewReader(c.base))
+			assert.NoError(t, err)
+		}
+
+		var headReader *csv.Reader
+		if len(c.head) > 0 {
+			headReader, err = csv_module.CreateReaderAndDetermineDelimiter(nil, strings.NewReader(c.head))
+			assert.NoError(t, err)
+		}
+
+		result, err := CreateCsvDiff(diff.Files[0], baseReader, headReader)
+		assert.NoError(t, err)
+		assert.Len(t, result, 1, "case %d: should be one section", n)
+
+		section := result[0]
+		assert.Len(t, section.Rows, len(c.cells), "case %d: should be %d rows", n, len(c.cells))
+
+		for i, row := range section.Rows {
+			assert.Len(t, row.Cells, len(c.cells[i]), "case %d: row %d should have %d cells", n, i, len(c.cells[i]))
+			for j, cell := range row.Cells {
+				assert.Equal(t, c.cells[i][j], cell.Type, "case %d: row %d cell %d should be equal", n, i, j)
+			}
+		}
+	}
+}