fix(field): added Date support to InteractionStateMixin

Author: tlouisse

packages/field/src/InteractionStateMixin.js

@@ -60,7 +60,7 @@ export const InteractionStateMixin = dedupeMixin(
           value = modelValue.viewValue;
         }
         // Checks for empty platform types: Objects, Arrays, Dates
-        if (typeof value === 'object' && value !== null) {
+        if (typeof value === 'object' && value !== null && !(value instanceof Date)) {
           return !!Object.keys(value).length;
         }
         // eslint-disable-next-line no-mixed-operators

packages/field/test-suites/InteractionStateMixin.suite.js

@@ -14,7 +14,7 @@ import { InteractionStateMixin } from '../src/InteractionStateMixin.js';
 export function runInteractionStateMixinSuite(customConfig) {
   const cfg = {
     tagString: null,
-    allowedModelValueTypes: [Array, Object, Number, Boolean, String],
+    allowedModelValueTypes: [Array, Object, Number, Boolean, String, Date],
     suffix: '',
     ...customConfig,
   };
@@ -154,6 +154,10 @@ export function runInteractionStateMixinSuite(customConfig) {
         changeModelValueAndLeave('');
         expect(el.prefilled, 'empty string should not be "prefilled"').to.be.false;
       }
+      if (cfg.allowedModelValueTypes.includes(Date)) {
+        changeModelValueAndLeave(new Date());
+        expect(el.prefilled, 'Dates should be "prefilled"').to.be.true;
+      }
 
       // Not prefilled
       changeModelValueAndLeave(null);