feat(vModel): warn if v-model is used on file input (#295)

packages/compiler-dom/__tests__/transforms/vModel.spec.ts

@@ -0,0 +1,28 @@
+import { parse, transform, CompilerOptions } from '@vue/compiler-core'
+import { transformModel } from '../../src/transforms/vModel'
+import { transformElement } from '../../../compiler-core/src/transforms/transformElement'
+import { DOMErrorCodes } from '../../src/errors'
+
+function transformWithModel(template: string, options: CompilerOptions = {}) {
+  const ast = parse(template)
+  transform(ast, {
+    nodeTransforms: [transformElement],
+    directiveTransforms: {
+      model: transformModel
+    },
+    ...options
+  })
+  return ast
+}
+
+describe('compiler: v-model transform', () => {
+  it('should raise error if used file input element', () => {
+    const onError = jest.fn()
+    transformWithModel(`<input type="file" v-model="test"></input>`, {
+      onError
+    })
+    expect(onError.mock.calls).toMatchObject([
+      [{ code: DOMErrorCodes.X_V_MODEL_ON_FILE_INPUT_ELEMENT }]
+    ])
+  })
+})