fetch: Demonstrate that we're writing FETCH_HEAD

Extend tests which use git-fetch(1) to demonstrate that we're writing
the FETCH_HEAD file.

3 files changed, 7 insertions, 1 deletions

diff --git a/internal/git/localrepo/remote_extra_test.go b/internal/git/localrepo/remote_extra_test.go
index 5c40c9290..eb834325b 100644
--- a/internal/git/localrepo/remote_extra_test.go
+++ b/internal/git/localrepo/remote_extra_test.go
@@ -79,6 +79,8 @@ func TestRepo_FetchInternal(t *testing.T) {
 
 		// Assert that we're using the expected Git protocol version, which is protocol v2.
 		require.Equal(t, "GIT_PROTOCOL=version=2\n", readGitProtocol())
+
+		require.FileExists(t, filepath.Join(repoPath, "FETCH_HEAD"))
 	})
 
 	t.Run("refspec without tags", func(t *testing.T) {
diff --git a/internal/git/localrepo/remote_test.go b/internal/git/localrepo/remote_test.go
index 3a0eb19b0..ed83b8e3b 100644
--- a/internal/git/localrepo/remote_test.go
+++ b/internal/git/localrepo/remote_test.go
@@ -63,7 +63,7 @@ func TestRepo_FetchRemote(t *testing.T) {
 	})
 
 	t.Run("ok", func(t *testing.T) {
-		repo, _ := initBareWithRemote(t, "origin")
+		repo, repoPath := initBareWithRemote(t, "origin")
 
 		var stderr bytes.Buffer
 		require.NoError(t, repo.FetchRemote(ctx, "origin", FetchOpts{Stderr: &stderr}))
@@ -78,6 +78,8 @@ func TestRepo_FetchRemote(t *testing.T) {
 		sha, err := repo.ResolveRevision(ctx, git.Revision("refs/remotes/origin/master^{commit}"))
 		require.NoError(t, err, "the object from remote should exists in local after fetch done")
 		require.Equal(t, git.ObjectID("1e292f8fedd741b75372e19097c76d327140c312"), sha)
+
+		require.FileExists(t, filepath.Join(repoPath, "FETCH_HEAD"))
 	})
 
 	t.Run("with env", func(t *testing.T) {
diff --git a/internal/git/objectpool/fetch_test.go b/internal/git/objectpool/fetch_test.go
index d650be1da..eedf1513e 100644
--- a/internal/git/objectpool/fetch_test.go
+++ b/internal/git/objectpool/fetch_test.go
@@ -226,6 +226,8 @@ func TestFetchFromOrigin_refs(t *testing.T) {
 		},
 		strings.Split(text.ChompBytes(gittest.Exec(t, cfg, "-C", poolPath, "for-each-ref", "--format=%(refname)")), "\n"),
 	)
+
+	require.FileExists(t, filepath.Join(poolPath, "FETCH_HEAD"))
 }
 
 func resolveRef(t *testing.T, cfg config.Cfg, repo string, ref string) string {