Regression test for moving custom patch to new commit from last commit of a stacked branch

I almost broke this during the development of this branch, so add a test to
guard against that. The point here is that the stack remains intact, i.e. the
newly created commit is the last commit of the lower branch, and thus shows the
"*".

pkg/integration/tests/patch_building/move_to_new_commit_in_last_commit_of_stacked_branch.go

@@ -0,0 +1,72 @@
+package patch_building
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var MoveToNewCommitInLastCommitOfStackedBranch = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Move a patch from a commit to a new commit, in the last commit of a branch in the middle of a stack",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	GitVersion:   AtLeast("2.38.0"),
+	SetupConfig: func(config *config.AppConfig) {
+		config.GetAppState().GitLogShowGraph = "never"
+	},
+	SetupRepo: func(shell *Shell) {
+		shell.
+			EmptyCommit("commit 01").
+			NewBranch("branch1").
+			EmptyCommit("commit 02").
+			CreateFileAndAdd("file1", "file1 content").
+			CreateFileAndAdd("file2", "file2 content").
+			Commit("commit 03").
+			NewBranch("branch2").
+			CreateNCommitsStartingAt(2, 4)
+
+		shell.SetConfig("rebase.updateRefs", "true")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("CI commit 05").IsSelected(),
+				Contains("CI commit 04"),
+				Contains("CI * commit 03"),
+				Contains("CI commit 02"),
+				Contains("CI commit 01"),
+			).
+			NavigateToLine(Contains("commit 03")).
+			PressEnter()
+
+		t.Views().CommitFiles().
+			IsFocused().
+			Lines(
+				Equals("▼ /").IsSelected(),
+				Equals("  A file1"),
+				Equals("  A file2"),
+			).
+			SelectNextItem().
+			PressPrimaryAction().
+			PressEscape()
+
+		t.Views().Information().Content(Contains("Building patch"))
+
+		t.Common().SelectPatchOption(Contains("Move patch into new commit"))
+
+		t.ExpectPopup().CommitMessagePanel().
+			InitialText(Equals("")).
+			Type("new commit").Confirm()
+
+		t.Views().Commits().
+			IsFocused().
+			Lines(
+				Contains("CI commit 05"),
+				Contains("CI commit 04"),
+				Contains("CI * new commit").IsSelected(),
+				Contains("CI commit 03"),
+				Contains("CI commit 02"),
+				Contains("CI commit 01"),
+			)
+	},
+})

pkg/integration/tests/test_list.go

@@ -311,6 +311,7 @@ var tests = []*components.IntegrationTest{
 	patch_building.MoveToNewCommit,
 	patch_building.MoveToNewCommitFromAddedFile,
 	patch_building.MoveToNewCommitFromDeletedFile,
+	patch_building.MoveToNewCommitInLastCommitOfStackedBranch,
 	patch_building.MoveToNewCommitPartialHunk,
 	patch_building.RemoveFromCommit,
 	patch_building.RemovePartsOfAddedFile,