fix: stub model option (#1166)

Author: eddyerburgh

packages/create-instance/create-component-stubs.js

@@ -38,6 +38,7 @@ function getCoreProperties(componentOptions: Component): Object {
   return {
     attrs: componentOptions.attrs,
     name: componentOptions.name,
+    model: componentOptions.model,
     props: componentOptions.props,
     on: componentOptions.on,
     key: componentOptions.key,

test/specs/shallow-mount.spec.js

@@ -554,4 +554,26 @@ describeRunIf(process.env.TEST_ENV !== 'node', 'shallowMount', () => {
       )
     }
   )
+
+  itDoNotRunIf(vueVersion < 2.2, 'stubs model', () => {
+    const ChildComponent = {
+      template: '<div />',
+      model: {
+        prop: 'a',
+        event: 'change'
+      },
+      props: ['a']
+    }
+    const TestComponent = {
+      template: '<child-component v-model="val" />',
+      data() {
+        return {
+          val: '123'
+        }
+      },
+      components: { ChildComponent }
+    }
+    const wrapper = shallowMount(TestComponent)
+    expect(wrapper.find(ChildComponent).vm.a).to.equal('123')
+  })
 })