testing.assertEmpty() function

testing.assertEmpty() tests if an input stream is empty. If not empty, the function returns an error.

assertEmpty can be used to perform in-line tests in a query.

Function type signature
(<-tables: stream[A]) => stream[A]
For more information, see Function type signatures.



Input data. Default is piped-forward data (<-).


Check if there is a difference between streams

This example uses testing.diff() to output the difference between two streams of tables. testing.assertEmpty() checks to see if the difference is empty.

import "sampledata"
import "testing"

want =
got = sampledata.float() |> toInt()

    |> testing.diff(want: want)
    |> testing.assertEmpty()

Was this page helpful?

Thank you for your feedback!

Linux Package Signing Key Rotation

All signed InfluxData Linux packages have been resigned with an updated key. If using Linux, you may need to update your package configuration to continue to download and verify InfluxData software packages.

For more information, see the Linux Package Signing Key Rotation blog post.