test: stabilize reference autocomplete unit cleanup

tests/unit/reference-autocomplete-pos.spec.js

@@ -1,5 +1,5 @@
 // @vitest-environment jsdom
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { mountWithApp } from "./helpers/mountWithApp.js";
 import ReferenceAutocompletePOS from "@/components/forms/department/pos/input/ReferenceAutocompletePOS.vue";
 
@@ -16,8 +16,72 @@ const flushPromises = async () => {
   await Promise.resolve();
 };
 
+// Buefy schedules dropdown viewport checks after activation; stubbing it keeps this focused unit test from
+// leaking those browser-only timers past jsdom teardown.
+const AutocompleteStub = {
+  name: "BAutocomplete",
+  inheritAttrs: false,
+  props: {
+    modelValue: {
+      type: String,
+      default: "",
+    },
+    data: {
+      type: Array,
+      default: () => [],
+    },
+  },
+  emits: ["blur", "focus", "keydown", "select", "typing", "update:modelValue"],
+  methods: {
+    emitInput(event) {
+      const value = event.target.value;
+      this.$emit("update:modelValue", value);
+      this.$emit("typing", value);
+    },
+    optionsFor(group) {
+      return Array.isArray(group?.items) ? group.items : [];
+    },
+    optionKey(option) {
+      return `${option.source}-${option.origin_id}-${option.reference}`;
+    },
+  },
+  template: `
+    <div class="b-autocomplete-stub">
+      <input
+        v-bind="$attrs"
+        :value="modelValue"
+        @input="emitInput"
+        @focus="$emit('focus', $event)"
+        @blur="$emit('blur', $event)"
+        @keydown="$emit('keydown', $event)"
+      />
+      <div class="dropdown-content">
+        <template v-for="(group, index) in data" :key="group.group || index">
+          <slot name="group" :group="group.group" :index="index">
+            <span>{{ group.group }}</span>
+          </slot>
+          <button
+            v-for="option in optionsFor(group)"
+            :key="optionKey(option)"
+            type="button"
+            class="dropdown-item"
+            @click="$emit('select', option, $event)"
+          >
+            <slot :option="option">
+              {{ option.reference }}
+            </slot>
+          </button>
+        </template>
+        <slot v-if="data.length === 0" name="empty" />
+      </div>
+    </div>
+  `,
+};
+
+const mountedWrappers = [];
+
 function mountAutocomplete(props = {}) {
-  return mountWithApp(ReferenceAutocompletePOS, {
+  const wrapper = mountWithApp(ReferenceAutocompletePOS, {
     props: {
       modelValue: "",
       departmentId: 12,
@@ -26,7 +90,15 @@ function mountAutocomplete(props = {}) {
       debounceMs: 0,
       ...props,
     },
+    global: {
+      stubs: {
+        BAutocomplete: AutocompleteStub,
+      },
+    },
   });
+
+  mountedWrappers.push(wrapper);
+  return wrapper;
 }
 
 describe("ReferenceAutocompletePOS", () => {
@@ -35,6 +107,12 @@ describe("ReferenceAutocompletePOS", () => {
     requestState.authenticatedRequest.mockResolvedValue({ data: { data: [] } });
   });
 
+  afterEach(() => {
+    for (const wrapper of mountedWrappers.splice(0)) {
+      wrapper.unmount();
+    }
+  });
+
   it("fetches async suggestions with the current POS context", async () => {
     requestState.authenticatedRequest.mockResolvedValue({
       data: {