Add option to copy commit message body

pkg/integration/tests/commit/disable_copy_commit_message_body.go

@@ -0,0 +1,33 @@
+package commit
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var DisableCopyCommitMessageBody = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Disables copy commit message body when there is no body",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+
+	SetupRepo: func(shell *Shell) {
+		shell.EmptyCommit("commit")
+	},
+
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("commit").IsSelected(),
+			).
+			Press(keys.Commits.CopyCommitAttributeToClipboard)
+
+		t.ExpectPopup().Menu().
+			Title(Equals("Copy to clipboard")).
+			Select(Contains("Commit message body")).
+			Confirm()
+
+		t.ExpectToast(Equals("Disabled: Commit has no message body"))
+	},
+})