feat: add set method on state collections

src/common/BaseSharedStateCollection.js

@@ -75,6 +75,18 @@ class BaseSharedStateCollection {
     return this._states.map(state => state.get(name));
   }
 
+  /**
+   * Update all states of the collection with given values.
+   * @param {object} updates - key / value pairs of updates to apply to the state.
+   * @param {mixed} [context=null] - optionnal contextual object that will be propagated
+   *   alongside the updates of the state. The context is valid only for the
+   *   current call and will be passed as third argument to all update listeners.
+   */
+  async set(updates, context = null) {
+    const promises = this._states.map(state => state.set(updates, context));
+    return Promise.all(promises);
+  }
+
   /**
    * Subscribe to any state update of the collection.
    *

tests/common.state-manager.spec.js

@@ -1407,6 +1407,18 @@ describe(`common::StateManager`, () => {
       state.delete();
     });
 
+    it.only(`collection.set(updates, context = null)`, async () => {
+      const state = await client.stateManager.create('a');
+      const collection = await clients[1].stateManager.getCollection('a');
+
+      const results = await collection.set({ bool: true });
+      const expected = [ { bool: true } ];
+
+      assert.deepEqual(expected, results);
+
+      state.delete();
+    });
+
     it(`collection.onUpdate(callback)`, async () => {
       const state = await client.stateManager.create('a');