Add integration tests for rebasing to the initial commit

pkg/integration/tests/interactive_rebase/fixup_second_commit.go

@@ -0,0 +1,44 @@
+package interactive_rebase
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var FixupSecondCommit = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Fixup the second commit into the first (initial)",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.
+			CreateNCommits(3)
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("commit 03"),
+				Contains("commit 02"),
+				Contains("commit 01"),
+			).
+			NavigateToListItem(Contains("commit 02")).
+			Press(keys.Commits.MarkCommitAsFixup).
+			Tap(func() {
+				t.ExpectPopup().Confirmation().
+					Title(Equals("Fixup")).
+					Content(Equals("Are you sure you want to 'fixup' this commit? It will be merged into the commit below")).
+					Confirm()
+			}).
+			Lines(
+				Contains("commit 03"),
+				Contains("commit 01").IsSelected(),
+			)
+
+		t.Views().Main().
+			Content(Contains("commit 01")).
+			Content(DoesNotContain("commit 02")).
+			Content(Contains("+file01 content")).
+			Content(Contains("+file02 content"))
+	},
+})