Add tests for clone from wiki (#15513)

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

integrations/git_clone_wiki_test.go

@@ -0,0 +1,51 @@
+// Copyright 2021 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 integrations
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net/url"
+	"path/filepath"
+	"testing"
+
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/util"
+	"github.com/stretchr/testify/assert"
+)
+
+func assertFileExist(t *testing.T, p string) {
+	exist, err := util.IsExist(p)
+	assert.NoError(t, err)
+	assert.True(t, exist)
+}
+
+func assertFileEqual(t *testing.T, p string, content []byte) {
+	bs, err := ioutil.ReadFile(p)
+	assert.NoError(t, err)
+	assert.EqualValues(t, content, bs)
+}
+
+func TestRepoCloneWiki(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, u *url.URL) {
+		defer prepareTestEnv(t)()
+
+		dstPath, err := ioutil.TempDir("", "clone_wiki")
+		assert.NoError(t, err)
+
+		r := fmt.Sprintf("%suser2/repo1.wiki.git", u.String())
+		u, _ = url.Parse(r)
+		u.User = url.UserPassword("user2", userPassword)
+		t.Run("Clone", func(t *testing.T) {
+			assert.NoError(t, git.CloneWithArgs(context.Background(), u.String(), dstPath, allowLFSFilters(), git.CloneRepoOptions{}))
+			assertFileEqual(t, filepath.Join(dstPath, "Home.md"), []byte("# Home page\n\nThis is the home page!\n"))
+			assertFileExist(t, filepath.Join(dstPath, "Page-With-Image.md"))
+			assertFileExist(t, filepath.Join(dstPath, "Page-With-Spaced-Name.md"))
+			assertFileExist(t, filepath.Join(dstPath, "images"))
+			assertFileExist(t, filepath.Join(dstPath, "jpeg.jpg"))
+		})
+	})
+}