is.EqualJSON support

[sanan-fataliyev]

Hi,

It would be helpful to have a is.EqualJSON(a, b string) function to compare JSON values structurally, ignoring formatting and key order.

Example:

expected := `{"name":"Alice","age":30}`
actual := `{
    "age": 30,
    "name": "Alice"
}`

is.EqualJSON(expected, actual)

Possible implementation idea

Internally, this could unmarshal both inputs into interface{} and then use is.Equal.

If you're open to it, I’d be happy to contribute a PR.

Thanks!

[breml]

Hi @sanan-fataliyev

The is package is very lightweight on purpose. In the past, I can not remember a single addition regarding additional equality helpers, which has been added.

I feel, it is pretty simple to add a small helper function to your own code, which does pre-process your JSON the way you need it and then pass the results to is. If this is not suitable for you, you might want to consider using one of the more heavy weight test helper packages like https://github.com/stretchr/testify.

[sanan-go]

Hi @breml, thank you for the response.

That makes sense - In fact I came across is while looking for a lightweight, zero-dependency alternative to testify, so I get the motivation to keep things minimal.

My thinking was that a helper like EqualJSON wouldn't add much weight, since it could be a thin wrapper around existing functionality. But I can see how small additions like this can accumulate over time.

Currently I need it only in one project, so custom helper will do fine.

[yetanotheraryan]

Hi @matryer, I'd like to contribute a PR for this.