test(hooks): 添加 useLocale 钩子的单元测试

- 创建 useLocale.test.tsx 文件，实现对 useLocale 钩子的全面测试
- 测试内容包括：
  - 正确提供 locale 配置
  - 反应式更新文本
  - 未定义键时返回键名
  - 覆盖全局配置的功能
- 使用 Vitest 和 @vue/test-utils 进行测试

src/hooks/__tests__/useLocale.test.tsx

@@ -0,0 +1,97 @@
+import { computed, defineComponent, nextTick } from 'vue'
+import { mount } from '@vue/test-utils'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import Chinese from '@/locale/lang/zh-cn'
+import English from '@/locale/lang/en'
+import { provideGlobalConfig } from '@/components/configProvider'
+import { buildTranslator, useLocale } from '../useLocale'
+import type { Language } from '@/locale'
+import type { ComponentPublicInstance, PropType } from 'vue'
+import type { VueWrapper } from '@vue/test-utils'
+
+const TestComp = defineComponent({
+  setup() {
+    const { t } = useLocale()
+    return () => (
+      <div class="locale-manifest">{t('el.popconfirm.confirmButtonText')}</div>
+    )
+  },
+})
+
+describe('use-locale', () => {
+  let wrapper: VueWrapper<ComponentPublicInstance>
+
+  beforeEach(() => {
+    wrapper = mount(
+      defineComponent({
+        props: {
+          locale: {
+            type: Object as PropType<Language>,
+            default: Chinese,
+          },
+        },
+        setup(props) {
+          provideGlobalConfig(computed(() => ({ locale: props.locale })))
+          return () => <TestComp />
+        },
+      })
+    )
+  })
+
+  afterEach(() => {
+    wrapper.unmount()
+  })
+
+  it('should provide locale correctly', async () => {
+    await nextTick()
+    expect(wrapper.find('.locale-manifest').text()).toBe(
+      Chinese.el.popconfirm.confirmButtonText
+    )
+  })
+
+  it('should update the text reactively', async () => {
+    await nextTick()
+    expect(wrapper.find('.locale-manifest').text()).toBe(
+      Chinese.el.popconfirm.confirmButtonText
+    )
+    await wrapper.setProps({
+      locale: English,
+    })
+
+    expect(wrapper.find('.locale-manifest').text()).toBe(
+      English.el.popconfirm.confirmButtonText
+    )
+  })
+
+  it('return key name if not defined', () => {
+    const t = buildTranslator(English)
+    expect(t('el.popconfirm.someThing')).toBe('el.popconfirm.someThing')
+  })
+
+  describe('overrides', () => {
+    it('should be override correctly', () => {
+      const override = computed(() => English)
+
+      const wrapper = mount(
+        defineComponent({
+          setup(_, { expose }) {
+            const { locale } = useLocale(override)
+            expose({
+              locale,
+            })
+          },
+          template: '<div></div>',
+        }),
+        {
+          global: {
+            provide: {
+              locale: Chinese,
+            },
+          },
+        }
+      )
+
+      expect(wrapper.vm.locale).toBe(override.value)
+    })
+  })
+})