Add attachToDocument conditional deprecation message, fix #1545 (#1546)

* fix(config): add attachToDocument conditional deprecation message

resolves #1545

* test(config): add attachToDocument deprecation warning test

Author: phiter

packages/shared/validate-options.js

@@ -7,7 +7,7 @@ import {
 } from './validators'
 import { VUE_VERSION } from './consts'
 import { compileTemplateForSlots } from './compile-template'
-import { throwError, warn } from './util'
+import { throwError, warnDeprecated } from './util'
 import { validateSlots } from './validate-slots'
 
 function vueExtendUnsupportedOption(option) {
@@ -34,7 +34,7 @@ export function validateOptions(options, component) {
     )
   }
   if ('attachToDocument' in options) {
-    warn(
+    warnDeprecated(
       `options.attachToDocument is deprecated in favor of options.attachTo and will be removed in a future release`
     )
   }

test/specs/config.spec.js

@@ -101,7 +101,7 @@ describeWithShallowAndMount('config', mountingMethod => {
     expect(wrapper.find('[data-testid="expanded"]').exists()).to.equal(false)
   })
 
-  it('allows control deprecation warnings visibility', () => {
+  it('allows control deprecation warnings visibility for name method', () => {
     config.showDeprecationWarnings = true
     const Component = {
       name: 'Foo',
@@ -114,4 +114,34 @@ describeWithShallowAndMount('config', mountingMethod => {
     wrapper.name()
     expect(console.error).to.have.callCount(1)
   })
+
+  describe('attachToDocument deprecation warning', () => {
+    const Component = {
+      name: 'Foo',
+      template: '<div>Foo</div>'
+    }
+
+    it('should show warning if config is enabled', () => {
+      config.showDeprecationWarnings = true
+
+      mountingMethod(Component, {
+        attachToDocument: true
+      })
+      expect(console.error).to.be.calledWith(
+        sandbox.match('attachToDocument is deprecated')
+      )
+    })
+
+    it('should not show warning if config is disabled', () => {
+      config.showDeprecationWarnings = false
+
+      mountingMethod(Component, {
+        attachToDocument: true
+      })
+
+      expect(console.error).not.to.be.calledWith(
+        sandbox.match('attachToDocument is deprecated')
+      )
+    })
+  })
 })