Add integration test for amending from the files panel

pkg/integration/tests/commit/amend.go

@@ -0,0 +1,41 @@
+package commit
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var Amend = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Amends the last commit from the files panel",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFileAndAdd("myfile", "myfile content\n")
+		shell.Commit("first commit")
+		shell.UpdateFileAndAdd("myfile", "myfile content\nmore content\n")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Lines(
+				Contains("first commit"),
+			)
+
+		t.Views().Files().
+			Focus().
+			Press(keys.Commits.AmendToCommit)
+
+		t.ExpectPopup().Confirmation().Title(
+			Equals("Amend Last Commit")).
+			Content(Contains("Are you sure you want to amend last commit?")).
+			Confirm()
+
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("first commit"),
+			)
+
+		t.Views().Main().Content(Contains("+myfile content").Contains("+more content"))
+	},
+})

pkg/integration/tests/test_list.go

@@ -44,6 +44,7 @@ var tests = []*components.IntegrationTest{
 	branch.Suggestions,
 	cherry_pick.CherryPick,
 	cherry_pick.CherryPickConflicts,
+	commit.Amend,
 	commit.Commit,
 	commit.CommitMultiline,
 	commit.CreateTag,