Add integration test for dropping a todo commit when there's an update-ref

The test shows how we are accidentally dropping the wrong commit in this case.
We'll fix that in the next commit.

pkg/integration/components/shell.go

@@ -192,7 +192,11 @@ func (self *Shell) DeleteFileAndAdd(fileName string) *Shell {
 // The reason for padding with zeroes is so that it's easier to do string
 // matches on the commit messages when there are many of them
 func (self *Shell) CreateNCommits(n int) *Shell {
-	for i := 1; i <= n; i++ {
+	return self.CreateNCommitsStartingAt(n, 1)
+}
+
+func (self *Shell) CreateNCommitsStartingAt(n, startIndex int) *Shell {
+	for i := startIndex; i < startIndex+n; i++ {
 		self.CreateFileAndAdd(
 			fmt.Sprintf("file%02d.txt", i),
 			fmt.Sprintf("file%02d content", i),

pkg/integration/tests/interactive_rebase/drop_todo_commit_with_update_ref.go

@@ -0,0 +1,72 @@
+package interactive_rebase
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var DropTodoCommitWithUpdateRef = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Drops a commit during interactive rebase when there is an update-ref in the git-rebase-todo file",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	GitVersion:   From("2.38.0"),
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.
+			CreateNCommits(3).
+			NewBranch("mybranch").
+			CreateNCommitsStartingAt(3, 4)
+
+		shell.SetConfig("rebase.updateRefs", "true")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("(*) commit 06").IsSelected(),
+				Contains("commit 05"),
+				Contains("commit 04"),
+				Contains("(*) commit 03"),
+				Contains("commit 02"),
+				Contains("commit 01"),
+			).
+			// Once "e" is fixed we can just hit "e", but for now we need to
+			// manually do a command-line rebase
+			// NavigateToLine(Contains("commit 01")).
+			// Press(keys.Universal.Edit).
+			Tap(func() {
+				t.GlobalPress(keys.Universal.ExecuteCustomCommand)
+				t.ExpectPopup().Prompt().
+					Title(Equals("Custom Command:")).
+					Type(`git -c core.editor="perl -i -lpe 'print \"break\" if $.==1'" rebase -i HEAD~5`).
+					Confirm()
+			}).
+			Focus().
+			Lines(
+				Contains("pick").Contains("(*) commit 06"),
+				Contains("pick").Contains("commit 05"),
+				Contains("pick").Contains("commit 04"),
+				Contains("update-ref").Contains("master"),
+				Contains("pick").Contains("(*) commit 03"),
+				Contains("pick").Contains("commit 02"),
+				Contains("<-- YOU ARE HERE --- commit 01"),
+			).
+			NavigateToLine(Contains("commit 05")).
+			Press(keys.Universal.Remove)
+
+		t.Common().ContinueRebase()
+
+		t.Views().Commits().
+			IsFocused().
+			Lines(
+				Contains("(*) commit 06"),
+				/* EXPECTED:
+				Contains("commit 04"),
+				ACTUAL: */
+				Contains("commit 05"),
+				Contains("(*) commit 03"),
+				Contains("commit 02"),
+				Contains("commit 01"),
+			)
+	},
+})

pkg/integration/tests/test_list.go

@@ -87,6 +87,7 @@ var tests = []*components.IntegrationTest{
 	interactive_rebase.AmendHeadCommitDuringRebase,
 	interactive_rebase.AmendMerge,
 	interactive_rebase.AmendNonHeadCommitDuringRebase,
+	interactive_rebase.DropTodoCommitWithUpdateRef,
 	interactive_rebase.EditFirstCommit,
 	interactive_rebase.EditNonTodoCommitDuringRebase,
 	interactive_rebase.FixupFirstCommit,