Add integration tests for rebasing to the initial commit

pkg/integration/tests/interactive_rebase/edit_first_commit.go

@@ -0,0 +1,38 @@
+package interactive_rebase
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var EditFirstCommit = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Edits the first commit, just to show that it's possible",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.
+			CreateNCommits(2)
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("commit 02"),
+				Contains("commit 01"),
+			).
+			NavigateToListItem(Contains("commit 01")).
+			Press(keys.Universal.Edit).
+			Lines(
+				Contains("commit 02"),
+				MatchesRegexp("YOU ARE HERE.*commit 01").IsSelected(),
+			).
+			Tap(func() {
+				t.Actions().ContinueRebase()
+			}).
+			Lines(
+				Contains("commit 02"),
+				Contains("commit 01"),
+			)
+	},
+})