test: increase coverage, add missing tests

fix: issues discovered by adding missing tests

test/utils/index.js

@@ -2,15 +2,7 @@ import { mount, createLocalVue } from '@vue/test-utils'
 import { renderToString } from '@vue/server-test-utils'
 import VueMetaBrowserPlugin from '../../src/browser'
 import VueMetaServerPlugin from '../../src'
-
-import {
-  keyName,
-  attribute,
-  ssrAttribute,
-  tagIDKeyName,
-  metaTemplateKeyName,
-  contentKeyName
-} from '../../src/shared/constants'
+import { defaultOptions } from './constants'
 
 export {
   mount,
@@ -19,15 +11,6 @@ export {
   VueMetaServerPlugin
 }
 
-export const defaultOptions = {
-  keyName,
-  attribute,
-  ssrAttribute,
-  tagIDKeyName,
-  metaTemplateKeyName,
-  contentKeyName
-}
-
 export function getVue() {
   return createLocalVue()
 }

test/utils/meta-info-data.js

@@ -1,4 +1,4 @@
-import { defaultOptions } from './'
+import { defaultOptions } from './constants'
 
 const metaInfoData = {
   title: {

test/utils/setup.js

@@ -1,5 +1 @@
-import jsdom from 'jsdom-global'
-
-jsdom()
-
 jest.useFakeTimers()