fix(compiler-sfc): transformAssetUrl should ignore inline data url (#1431)

packages/compiler-sfc/__tests__/templateUtils.spec.ts

@@ -1,6 +1,7 @@
 import {
   isRelativeUrl,
-  isExternalUrl
+  isExternalUrl,
+  isDataUrl
 } from '../../compiler-sfc/src/templateUtils'
 
 describe('compiler sfc:templateUtils isRelativeUrl', () => {
@@ -36,3 +37,17 @@ describe('compiler sfc:templateUtils isExternalUrl', () => {
     expect(result).toBe(true)
   })
 })
+
+describe('compiler sfc:templateUtils isDataUrl', () => {
+  test('should return true w/ hasn`t media type and encode', () => {
+    expect(isDataUrl('data:,i')).toBe(true)
+  })
+
+  test('should return true w/ media type + encode', () => {
+    expect(isDataUrl('data:image/png;base64,i')).toBe(true)
+  })
+
+  test('should return true w/ media type + hasn`t encode', () => {
+    expect(isDataUrl('data:image/png,i')).toBe(true)
+  })
+})