snapshot-testing

If a component has a child content parameter that is a RenderFragment<TValue>, then the parameter builder's AddChildContent method should throw an exception with an error message telling the user to use .Add(p => p.ChildContent, ...) instead.

For example, the following should throw an helpful exception:

var cut = RenderComponent<Virtualize<string>>(ps => ps
	.Add(p => p.Items, Te

Hi there

Awesome library guys. So helpful. Like it a lot!

I'd like to propose a feature request: Disable auto-creating new snapshots and instead print out the content as preview.

Using the "--update-snapshots" one can still update/create those missing snapshots.

Thx for your consideration
Best
Dimitri

Specifically the Swift version of the snapshot method in the iOSSnapshotTestCase subspec. The Objective-C version of this behaves correctly.

To reproduce:

func testView() {
    let view = UIView(frame: .init(x: 0, y: 0, width: 100, height: 100))
    SnapshotVerifyWithInvertedColors(view, identifier: "someIdentifier")
}

When run in record mode, this should produce a referen

The built in error message is very opaque (necessary because it has to be generic) but users can likely provide a more helpful friendly message customised to their tests (or e.g. when the diff just isn't useful). Therefore an option to customise this message would be useful.

This would only really be usable once #28 is implemented.