fix(radio-group): reset also if selected value is behind initial value

.changeset/polite-grapes-attack.md

@@ -0,0 +1,9 @@
+---
+'@lion/checkbox-group': patch
+'@lion/form-core': patch
+'@lion/radio-group': patch
+---
+
+- (RadioGroup) fix reset bug when selected value was behind inital value
+- Add ChoiceInputMixin test suite
+- Make use of ChoiceGroupMixin test suite

packages/radio-group/src/LionRadioGroup.js

@@ -10,4 +10,26 @@ export class LionRadioGroup extends ChoiceGroupMixin(FormGroupMixin(LitElement))
     super.connectedCallback();
     this.setAttribute('role', 'radiogroup');
   }
+
+  /**
+   * @override FormGroupMixin, during a reset if the current checked value is behind
+   * the initial checked value, they both got unchecked
+   */
+  resetGroup() {
+    let initValue;
+    this.formElements.forEach(child => {
+      if (typeof child.resetGroup === 'function') {
+        child.resetGroup();
+      } else if (typeof child.reset === 'function') {
+        child.reset();
+        // If the value was initially checked save this
+        if (child.checked) {
+          initValue = child.value;
+        }
+      }
+    });
+    this.modelValue = initValue;
+
+    this.resetInteractionState();
+  }
 }

packages/radio-group/test/lion-radio-group.test.js

@@ -1,5 +1,4 @@
 import { expect, fixture as _fixture, html } from '@open-wc/testing';
-
 import '../lion-radio-group.js';
 import '../lion-radio.js';