Added Snapshotting.json for Any value

[NachoSoto]

Currently the only way to snapshot Any value is using dump. However, the format isn't always as readable as it could be.
For data that can be encoded in JSON, this new overload provides a much more readable output.

[mbrandonw]

The library ships with a .json strategy that works for Encodable types:

https://github.com/pointfreeco/swift-snapshot-testing/blob/main/Sources/SnapshotTesting/Snapshotting/Codable.swift

And we have some tests to show how it works:

swift-snapshot-testing/Tests/SnapshotTestingTests/SnapshotTestingTests.swift

Lines 171 to 179 in 6bc120b

	func testEncodable() {
	struct User: Encodable { let id: Int, name: String, bio: String }
	let user = User(id: 1, name: "Blobby", bio: "Blobbed around the world.")
	if #available(iOS 11.0, macOS 10.13, tvOS 11.0, *) {
	assertSnapshot(matching: user, as: .json)
	}
	assertSnapshot(matching: user, as: .plist)
	}

Does this cover your use case?

[NachoSoto]

In the test that I added I'm using an Encodable type for convenience, but not all types are Encodable.

The specific use case I'm covering here is this: I have a type from an old Swift implementation that does "manual" JSON encoding into a [String: Any]. I'm working on converting that to use Codable, but before I do I wanted to add a snapshot test for that [String: Any] to ensure that the new Codable implementation doesn't change the output.

[mbrandonw]

Ah yes, I see now. Two things then: 1.) I think the strategy needs to be public, and 2.) could you update the test to use something that is not encodable, such as a [String: Any] dictionary?

[NachoSoto]

Oh yes my bad, changed to public.

As for the test, it's already using Any (the output of JSONSerialization.jsonObject). That's a [String: Any], but I can cast it if you prefer.

[mbrandonw]

Ah ok, I breezed past that. We can leave it as-is.

[NachoSoto]

Anything else I can do? :)

[mbrandonw]

Sorry for the delay. Thanks for this!

[NachoSoto]

Any chance we can get a release including this?