Add a test for not adding the vim swap file

Author: vHanda

common/commit_test.go

@@ -78,6 +78,21 @@ func Test_OneFileChange(t *testing.T) {
 	HasHeadCommit(t, repoPath, "28cc969d97ddb7640f5e1428bbc8f2947d1ffd57", " M 1.md\n")
 }
 
+func Test_VimSwapFile(t *testing.T) {
+	repoPath := PrepareFixture(t, "vim_swap_file")
+
+	err := commit(repoPath)
+	assert.NilError(t, err)
+
+	r, err := git.PlainOpen(repoPath)
+	assert.NilError(t, err)
+
+	head, err := r.Head()
+	assert.NilError(t, err)
+
+	assert.Equal(t, head.Hash(), plumbing.NewHash("28cc969d97ddb7640f5e1428bbc8f2947d1ffd57"))
+}
+
 func Test_MultipleFileChange(t *testing.T) {
 	repoPath := PrepareFixture(t, "multiple_file_change")
 

common/testdata/vim_swap_file/.1.md.swp

@@ -0,0 +1 @@
+ref: refs/heads/master

common/testdata/vim_swap_file/.gitted/HEAD

@@ -0,0 +1,5 @@
+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = false
+	logallrefupdates = true

common/testdata/vim_swap_file/.gitted/branches/.gitignore

@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.

common/testdata/vim_swap_file/.gitted/config

@@ -0,0 +1,2 @@
+# pack-refs with: peeled fully-peeled sorted 
+28cc969d97ddb7640f5e1428bbc8f2947d1ffd57 refs/heads/master