How do you deal with HttpContext being null?

[TimMurphy]

Take this very simple example.

• Create a Blazor Web App with Authentication

• Write a test with 2 lines:

  var testContext = new TestContext();
  var component = testContext.RenderComponent();

The test will throw a NullReferenceException at line 22 StatusMessage.OnInitialized() because HttpContext is null.

How do you work around any code that relies on HttpContext being instantiated?

[TimMurphy]

Here's the answer :-)

var externalLoginInfo = new ExternalLoginInfo(
   new ClaimsPrincipal(), 
   "login provider", 
   "provider key", 
   "provider display name"
);

var component = testContext.RenderComponent<ExternalLogin>(parameters => parameters
   .Add(p => p.HttpContext, new DefaultHttpContext())
   .Add(p => p.ExternalLoginInfo, externalLoginInfo)
);

[egil]

Nice, and yes, that works :)