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!

Introducing InfluxDB 3.0

The new core of InfluxDB built with Rust and Apache Arrow. Available today in InfluxDB Cloud Dedicated.

Learn more

State of the InfluxDB Cloud Serverless documentation

The new documentation for InfluxDB Cloud Serverless is a work in progress. We are adding new information and content almost daily. Thank you for your patience!

If there is specific information you’re looking for, please submit a documentation issue.