Added tentacle updater.

internal/app/tentacle_management_test.go

@@ -404,3 +404,25 @@ func TestManagedTentacleCancellationDuringBindingsRollsBack(t *testing.T) {
 		t.Fatalf("incorrect persisted rollback: %+v %v", disk, err)
 	}
 }
+
+// Updating an entry must preserve the user's enabled preference.
+func TestUpdatePreservesEnabledState(t *testing.T) {
+	for _, enabled := range []bool{false, true} {
+		current := tentacle.Entry{ID: "example", Program: []string{"/bin/true"}, Enabled: enabled, Version: "0.1.3"}
+		replacement := tentacle.Entry{ID: "example", Program: []string{"/bin/true"}, Enabled: !enabled, Version: "0.1.4"}
+		next, err := change_tentacle_entries(
+			[]tentacle.Entry{current},
+			tentacle.ManagementRequest{
+				Action: "update",
+				ID:     current.ID,
+				Entry:  &replacement,
+			},
+		)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if len(next) != 1 || next[0].Enabled != enabled || next[0].Version != "0.1.4" {
+			t.Fatalf("enabled=%v: unexpected result: %+v", enabled, next)
+		}
+	}
+}