Add IJSObjectReference support / JS Module support

[egil]

Pull request description

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• Pull request is targeting at DEV branch.
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• I have read the CONTRIBUTING.md document.

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• My code follows the code style of this project and AspNetCore coding guidelines.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I have updated the appropriate sub section in the CHANGELOG.md.
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[egil]

Hey @KristofferStrube, this is my initial draft. There are still tests missing, and at least some clean up of the code needed. But let me know what you think about the API. This is probably most easily done through tests/bunit.web.tests/JSInterop/BunitJSModuleInteropTest.cs.

[codecov]

Codecov Report

Merging #288 (a69fed1) into dev (5c668cb) will increase coverage by 0.13%.
The diff coverage is 90.09%.

@@            Coverage Diff             @@
##              dev     #288      +/-   ##
==========================================
+ Coverage   82.64%   82.77%   +0.13%     
==========================================
  Files         118      126       +8     
  Lines        3612     3710      +98     
  Branches      468      481      +13     
==========================================
+ Hits         2985     3071      +86     
- Misses        480      491      +11     
- Partials      147      148       +1     

Impacted Files	Coverage Δ
src/bunit.core/ComponentParameterCollection.cs	82.14% <ø> (ø)
src/bunit.core/RazorTesting/FixtureBase.cs	94.44% <ø> (ø)
src/bunit.core/RazorTesting/FragmentContainer.cs	100.00% <ø> (ø)
...b/Asserting/FocusAsyncAssertJSInteropExtensions.cs	100.00% <ø> (ø)
...it.web/Asserting/JSInvokeCountExpectedException.cs	54.83% <ø> (ø)
...it.web/Extensions/TestServiceProviderExtensions.cs	100.00% <ø> (ø)
...JSInterop/JSRuntimeUnhandledInvocationException.cs	100.00% <ø> (ø)
src/bunit.web/RazorTesting/Fixture.cs	95.65% <ø> (+1.44%)	⬆️
src/bunit.web/RazorTesting/SnapshotTest.cs	78.57% <ø> (ø)
src/bunit.web/Rendering/Internal/Htmlizer.cs	83.63% <ø> (ø)
... and 38 more

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[KristofferStrube]

I've looked through the tests and it looks good.

I tried to modify one of the tests to test a custom import without any parameters. Then we have to write the following:

JSInterop.SetupModule("customImport", Array.Empty<object>());
var module = await JSInterop.JSRuntime.InvokeAsync<IJSObjectReference>("customImport");

to specify that this is a custom import function with no arguments.

I'm not sure if that is intuitive but it would of course cause an overload of the SetupModule(moduleName) method if the arguments were to become optional, so I think it was the correct solution you made.

Overall looking good. 👍

[egil]

That was indeed my point about making the args array required. I did consider having a SetupCustomModule, but it felt a bit like too much work for a use case that is not likely to be used a lot, i think.

If folks need that in their lives, they can easily add it though, it's just an extension methods.