Add provide option to mount

src/lib/addProvide.js

@@ -0,0 +1,15 @@
+function addProvide (component, options) {
+  const provideOption = Object.assign({}, options.provide)
+  delete options.provide
+
+  const originalBeforeCreate = component.beforeCreate
+  component.beforeCreate = function beforeCreate () {
+    this._provided = provideOption
+
+    if (originalBeforeCreate) {
+      originalBeforeCreate.call(this)
+    }
+  }
+}
+
+export default addProvide

src/mount.js

@@ -2,6 +2,7 @@ import Vue from 'vue'
 import VueWrapper from './VueWrapper'
 import addSlots from './lib/addSlots'
 import addGlobals from './lib/addGlobals'
+import addProvide from './lib/addProvide'
 
 Vue.config.productionTip = false
 
@@ -31,7 +32,12 @@ export default function mount (component, options = {}) {
   // Remove cached constructor
   delete component._Ctor // eslint-disable-line no-param-reassign
 
+  if (options.provide) {
+    addProvide(component, options)
+  }
+
   const Constructor = Vue.extend(component)
+
   const vm = new Constructor(options)
 
   if (options.slots) {

test/resources/components/component-with-inject.vue

@@ -0,0 +1,15 @@
+<template>
+    <div>
+      {{ fromMount }}
+    </div>
+</template>
+
+<script>
+    export default {
+        name: 'component-with-inject',
+        inject: ['fromMount'],
+        beforeCreate() {
+          this.setInBeforeCreate = 'created'
+        }
+    };
+</script>

test/unit/specs/mount/options/provide.spec.js

@@ -0,0 +1,20 @@
+import mount from '../../../../../src/mount'
+import ComponentWithInject from '../../../../resources/components/component-with-inject.vue'
+
+describe('provide option in mount', () => {
+  it('provides value which is injected by mounted component', () => {
+    const wrapper = mount(ComponentWithInject, {
+      provide: { fromMount: 'providedValue' }
+    })
+
+    expect(wrapper.text()).to.contain('providedValue')
+  })
+
+  it('supports beforeCreate in component', () => {
+    const wrapper = mount(ComponentWithInject, {
+      provide: { fromMount: 'providedValue' }
+    })
+
+    expect(wrapper.vm.setInBeforeCreate).to.equal('created')
+  })
+})