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README
[logo](./logo.png)
jsonassert is a Go test assertion library for verifying that two representations of JSON are semantically equal.
Usage
Create a new *jsonassert.Asserter in your test and use this to make assertions against your JSON payloads:
func TestWhatever(t *testing.T) {
ja := jsonassert.New(t)
// find some sort of payload
ja.Assertf(payload, `
{
"name": "%s",
"age": %d,
"skills": [
{ "name": "martial arts", "level": 99 },
{ "name": "intelligence", "level": 100 },
{ "name": "mental fortitude", "level": 4 }
]
}`, "River Tam", 16)
}
You may pass in fmt.Sprintf arguments after the expected JSON structure.
ja.Assertf() supports assertions against strings only.
Check for presence only
Some properties of a JSON payload may be difficult to know in advance. E.g. timestamps, UUIDs, or other randomly assigned values.
For these types of values, place the string "<<PRESENCE>>" as the expected value, and jsonassert will only verify that this key exists (i.e. the actual JSON has the expected key, and its value is not null), but this does not check its value.
For example:
func TestWhatever(t *testing.T) {
ja := jsonassert.New(t)
ja.Assertf(`
{
"time": "2019-01-28T21:19:42",
"uuid": "94ae1a31-63b2-4a55-a478-47764b60c56b"
}`, `
{
"time": "<<PRESENCE>>",
"uuid": "<<PRESENCE>>"
}`)
}
The above will pass your test, but:
func TestWhatever(t *testing.T) {
ja := jsonassert.New(t)
ja.Assertf(`
{
"date": "2019-01-28T21:19:42",
"uuid": null
}`, `
{
"time": "<<PRESENCE>>",
"uuid": "<<PRESENCE>>"
}`)
}
The above will fail your tests because the time key was not present in the actual JSON, and the uuid was null.
Docs
You can find the GoDocs for this package here.
Contributing
Contributions are welcome. Please discuss feature requests in an issue before opening a PR.
*Note that all licence references and agreements mentioned in the jsonassert README section above
are relevant to that project's source code only.