Add isLoading prop to filter body and fix search box clear icon

ee/app/assets/javascripts/security_dashboard/components/filters/filter_body.vue

 <script>
-import { GlDropdown, GlSearchBoxByType, GlIcon, GlTruncate, GlDropdownText } from '@gitlab/ui';
+import {
+  GlDropdown,
+  GlSearchBoxByType,
+  GlIcon,
+  GlLoadingIcon,
+  GlTruncate,
+  GlDropdownText,
+} from '@gitlab/ui';
 
 export default {
   components: {
     GlDropdown,
     GlSearchBoxByType,
     GlIcon,
+    GlLoadingIcon,
     GlTruncate,
     GlDropdownText,
   },
@@ -28,7 +36,15 @@ export default {
       required: false,
       default: false,
     },
+    loading: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
   },
+  data: () => ({
+    searchBoxText: '',
+  }),
   computed: {
     firstSelectedOption() {
       return this.selectedOptions[0]?.name || '-';
@@ -61,11 +77,13 @@ export default {
       class="gl-mt-2 gl-w-full"
       menu-class="dropdown-extended-height"
       :header-text="name"
+      :loading="loading"
       toggle-class="gl-w-full"
       @show="emitDropdownShow"
       @hide="$emit('dropdown-hide')"
     >
       <template #button-content>
+        <gl-loading-icon v-if="loading" class="gl-mr-2" />
         <gl-truncate
           :text="firstSelectedOption"
           class="gl-min-w-0 gl-mr-2"
@@ -80,6 +98,7 @@ export default {
       <template v-if="showSearchBox" #header>
         <gl-search-box-by-type
           ref="searchBox"
+          v-model="searchBoxText"
           :placeholder="__('Search')"
           autocomplete="off"
           @input="emitInput"

ee/app/assets/javascripts/security_dashboard/components/filters/standard_filter.vue

@@ -15,6 +15,11 @@ export default {
       required: false,
       default: false,
     },
+    loading: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
   },
   data() {
     return {
@@ -109,6 +114,7 @@ export default {
     :name="filter.name"
     :selected-options="selectedOptionsOrAll"
     :show-search-box="showSearchBox"
+    :loading="loading"
   >
     <filter-item
       v-if="filter.allOption && !searchTerm.length"

ee/spec/frontend/security_dashboard/components/filters/filter_body_spec.js

-import { GlDropdown, GlSearchBoxByType } from '@gitlab/ui';
+import { GlDropdown, GlSearchBoxByType, GlLoadingIcon } from '@gitlab/ui';
 import { mount } from '@vue/test-utils';
 import FilterBody from 'ee/security_dashboard/components/filters/filter_body.vue';
 
@@ -80,10 +80,11 @@ describe('Filter Body component', () => {
       expect(spy).toHaveBeenCalledTimes(1);
     });
 
-    it('emits input event on component when search box input is changed', () => {
+    it('emits input event on component when search box input is changed', async () => {
       const text = 'abc';
       createComponent({ showSearchBox: true });
       searchBox().vm.$emit('input', text);
+      await wrapper.vm.$nextTick();
 
       expect(wrapper.emitted('input')[0][0]).toBe(text);
     });
@@ -103,4 +104,16 @@ describe('Filter Body component', () => {
       expect(wrapper.text()).toContain('No matching results');
     });
   });
+
+  describe('loading icon', () => {
+    it.each`
+      phrase     | loading
+      ${'shows'} | ${true}
+      ${'hides'} | ${false}
+    `('$phrase the loading icon when the loading prop is $loading', ({ loading }) => {
+      createComponent({ loading });
+
+      expect(wrapper.find(GlLoadingIcon).exists()).toBe(loading);
+    });
+  });
 });

ee/spec/frontend/security_dashboard/components/filters/standard_filter_spec.js

@@ -23,11 +23,11 @@ const optionIdsAt = (indexes) => optionsAt(indexes).map((x) => x.id);
 describe('Standard Filter component', () => {
   let wrapper;
 
-  const createWrapper = (filterOptions, showSearchBox) => {
+  const createWrapper = (filterOptions, props) => {
     wrapper = shallowMount(StandardFilter, {
       localVue,
       router,
-      propsData: { filter: { ...filter, ...filterOptions }, showSearchBox },
+      propsData: { filter: { ...filter, ...filterOptions }, ...props },
     });
   };
 
@@ -100,7 +100,7 @@ describe('Standard Filter component', () => {
       ${'shows'}         | ${true}
       ${'does not show'} | ${false}
     `('$phrase search box if showSearchBox is $showSearchBox', ({ showSearchBox }) => {
-      createWrapper({}, showSearchBox);
+      createWrapper({}, { showSearchBox });
 
       expect(filterBody().props('showSearchBox')).toBe(showSearchBox);
     });
@@ -116,6 +116,14 @@ describe('Standard Filter component', () => {
     });
   });
 
+  describe('loading prop', () => {
+    it.each([true, false])(`sets the filter body loading prop to %s`, (loading) => {
+      createWrapper({}, { loading });
+
+      expect(filterBody().props('loading')).toBe(loading);
+    });
+  });
+
   describe('selecting options', () => {
     beforeEach(() => {
       createWrapper({ defaultOptions: optionsAt([1, 2, 3]) });