Our System.Text.Json.SourceGeneration.Tests use the following to add references to the compilation:

This doesn't work in browser-wasm because Assembly.Location returns string.Empty. Thus we get exceptions that empty string is not a valid file path.

If we feel we need to run these tests on browser-wasm, we need to figure out a way to reference these assemblies so Roslyn can compile code.

cc @lewing @radical