feat: add firing of procedure events. (#6604)

* feat: add empty implementations of events

* chore: register all events

* chore: change assertions to shallow match properties

* feat: add firing events from the observable procedure map

* fix: make event not fired assertions actually fail

* chore: fixup typos in tests

* feat: add firing procedure model events

* feat: add firing parameter create and parameter delete events

* chore: reorganize event tests into suites

* feat: add firing parameter rename events

* chore: format

* chore: use tripple equals

core/interfaces/i_observable.ts

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright 2022 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+/**
+ * An object that fires events optionally.
+ *
+ * @internal
+ */
+export interface IObservable {
+  startPublishing(): void;
+  stopPublishing(): void;
+}
+
+/**
+ * Type guard for checking if an object fulfills IObservable.
+ *
+ * @internal
+ */
+export function isObservable(obj: any): obj is IObservable {
+  return obj.startPublishing !== undefined && obj.stopPublishing !== undefined;
+}

core/interfaces/i_parameter_model.ts

@@ -4,11 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/**
- * The interface for the data model of a procedure parameter.
- *
- * @namespace Blockly.IParameterModel
- */
+import {IProcedureModel} from './i_procedure_model';
 
 
 /**
@@ -42,4 +38,7 @@ export interface IParameterModel {
    * over time.
    */
   getId(): string;
+
+  /** Sets the procedure model this parameter is associated with. */
+  setProcedureModel(model: IProcedureModel): this;
 }