---
title: testing.load() function
description: >
  `testing.load()` loads test data from a stream of tables.
menu:
  flux_v0_ref:
    name: testing.load
    parent: testing
    identifier: testing/load
weight: 101

introduced: 0.112.0
---

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`testing.load()` loads test data from a stream of tables.



##### Function type signature

```js
(<-tables: A) => A
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### tables

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




## Examples

### Load a raw stream of tables in a test case

The following test uses `array.from()` to create two streams of tables to
compare in the test.

```js
import "testing"
import "array"

got =
    array.from(
        rows: [
            {_time: 2021-01-01T00:00:00Z, _measurement: "m", _field: "t", _value: 1.2},
            {_time: 2021-01-01T01:00:00Z, _measurement: "m", _field: "t", _value: 0.8},
            {_time: 2021-01-01T02:00:00Z, _measurement: "m", _field: "t", _value: 3.2},
        ],
    )

want =
    array.from(
        rows: [
            {_time: 2021-01-01T00:00:00Z, _measurement: "m", _field: "t", _value: 1.2},
            {_time: 2021-01-01T01:00:00Z, _measurement: "m", _field: "t", _value: 0.8},
            {_time: 2021-01-01T02:00:00Z, _measurement: "m", _field: "t", _value: 3.1},
        ],
    )

testing.load(tables: got)
    |> testing.diff(want: want)

```