Add test for file not found

[cristianvasquez]

I thought this component was not handling that part but it appears to work. :)
#8

[bergos]

@cristianvasquez can you replace the asyncThrows with assert.rejects? I guess getStream could be replaced with stream.resume(). Then there would be no need for new dependencies.

[cristianvasquez]

const stream = fromFile('not_found.ttl')
stream.resume()

However, that will not throw exceptions. Is that expected?

[cristianvasquez]

I've added the (failing) test in to branch

[bergos]

.resume() works, but the error is thrown after the async function is finished. You can add this line to wait for the error:

const { promisify } = require('util')
const { finished } = require('readable-stream')

// line after stream.resume()
await promisify(finished)(stream)

[bergos]

A sync error is thrown and throws() should be used. An await would be required if an async error is thrown.

[bergos]

Same here, a sync error is thrown.

[cristianvasquez]

I did the changes as requested

thanks for the review, I learned some things.