feat: configuration callback composition

src/__tests__/compose-configuration-callbacks.js

@@ -0,0 +1,45 @@
+import '@testing-library/jest-dom'
+import {render, screen} from '@testing-library/vue'
+import Vuei18n from 'vue-i18n'
+import Button from './components/Button'
+
+/**
+ * configuration callbacks may be shared shared between tests / test suites
+ * e.g. for common plugin installation
+ */
+const installGlobalComponents = vue => {
+  vue.component('CustomButton', Button)
+}
+
+const createVuei18nInstall = overrides => vue => {
+  vue.use(Vuei18n)
+
+  return {
+    i18n: new Vuei18n({
+      locale: 'en',
+      fallbackLocale: 'en',
+      ...overrides,
+    }),
+  }
+}
+
+test('can merge multiple configuration callbacks', () => {
+  render(
+    {
+      template: `<custom-button :text="$t('welcome')" />`,
+    },
+    {},
+    [
+      installGlobalComponents,
+      createVuei18nInstall({
+        messages: {
+          en: {
+            welcome: 'Hello',
+          },
+        },
+      }),
+    ],
+  )
+
+  expect(screen.getByRole('button')).toHaveTextContent('Hello')
+})

src/vue-testing-library.js

@@ -47,7 +47,11 @@ function render(
     })
   }
 
-  if (configurationCb && typeof configurationCb === 'function') {
+  if (configurationCb) {
+    if (Array.isArray(configurationCb)) {
+      configurationCb = composeConfigurationCallbacks(configurationCb)
+    }
+
     additionalOptions = configurationCb(localVue, vuexStore, router)
   }
 
@@ -85,6 +89,14 @@ function render(
   }
 }
 
+function composeConfigurationCallbacks(callbacks) {
+  return (...args) =>
+    callbacks.reduce(
+      (mergedReturns, cb) => ({...mergedReturns, ...cb(...args)}),
+      {},
+    )
+}
+
 function cleanup() {
   mountedWrappers.forEach(cleanupAtWrapper)
 }