feat: Beep when attempting constrained move on top-level block (#9635)

* feat: Beep when attempting constrained move on top-level block

* chore: Remove errant `only`

* refactor: Add and use `playErrorBeep()`

packages/blockly/core/dragging/block_drag_strategy.ts

@@ -380,6 +380,7 @@ export class BlockDragStrategy implements IDragStrategy {
 
       if (this.moveMode === MoveMode.CONSTRAINED) {
         showUnconstrainedMoveHint(this.workspace, true);
+        this.workspace.getAudioManager().playErrorBeep();
       }
     }
   }

packages/blockly/core/workspace_audio.ts

@@ -138,6 +138,13 @@ export class WorkspaceAudio {
     oscillator.stop(this.context.currentTime + duration);
   }
 
+  /**
+   * Plays a standard error beep.
+   */
+  async playErrorBeep() {
+    return this.beep(260);
+  }
+
   /**
    * Returns whether or not playing sounds is currently allowed.
    *

packages/blockly/tests/mocha/keyboard_movement_test.js

@@ -534,6 +534,7 @@ suite('Keyboard-driven movement', function () {
     suite('in constrained mode', function () {
       test('prompts to use unconstrained mode when no destinations are available', function () {
         const toastSpy = sinon.spy(Blockly.Toast, 'show');
+        const beepSpy = sinon.spy(this.workspace.getAudioManager(), 'beep');
         Blockly.getFocusManager().focusNode(this.element);
         const originalBounds = this.element.getBoundingRectangle();
         startMove(this.workspace);
@@ -547,6 +548,8 @@ suite('Keyboard-driven movement', function () {
             ? 'Hold ⌘ Command and use arrow keys to move freely, then Enter to accept the position'
             : 'Hold Ctrl and use arrow keys to move freely, then Enter to accept the position',
         );
+        sinon.assert.calledOnce(beepSpy);
+        beepSpy.restore();
         toastSpy.restore();
       });