Simplify tests with gabs?

[bfabio]

Writing tests in validationFunc can be annoying. We can consider using https://github.com/Jeffail/gabs to reduce the boilerplate.

[LorenzoS92]

Tried gabs succesfully in GET with page[size] query param

Test code:

jsonParsed.Exists("data")
assert.Equal(t, 2, len(jsonParsed.S("data").Children()))

jsonParsed.Exists("links")

value := jsonParsed.Path("links.prev").Data()
assert.Nil(t, value)

value, ok := jsonParsed.Path("links.next").Data().(string)
if ok {
	assert.Equal(t, "?page[after]=WyIyMDE4LTA1LTE2VDAwOjAwOjAwWiIsIjQ3ODA3ZTBjLTA2MTMtNGFlYS05OTE3LTU0NTVjYzZlZGRhZCJd", value)
} else {
	assert.FailNow(t, "Invalid links.prev.next")
}