Github user Hanks10100 commented on the issue:
https://github.com/apache/incubator-weex/pull/126
That because the node.js environment doesn't have the `callNative` method.
You should mock that method in tests.
1. Import `sinon`, which is already in the `devDependencies` of
package.json.
```js
import sinon from 'sinon'
```
2. Spy the `callNative` API.
```js
describe('vanilla test', () => {
// In case there did has callNative in the environment
const originalCallNative = global.callNative
const callNativeSpy = sinon.spy()
before(() => {
global.callNative = callNativeSpy
})
afterEach(() => {
callNativeSpy.reset()
})
after(() => {
global.callNative = originalCallNative
})
it('...', () => {})
})
```
Moreover, you can use `callNativeSpy` to check the parameter of call native
tasks.
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