Using Flurl with UnitTestEx

[karpikpl]

Flurl can be used with TestServer - see this stack overflow answer - https://stackoverflow.com/questions/50155702/can-i-use-flurlclient-with-asp-net-core-testserver
but UnitTestEx does not expose TestServer via an API, would it be possible to allow it?

[chullybun]

Published NuGet package v2.1.2.

[karpikpl]

The fix worked. I was able to use Flurl and have a valid unit test:

	public async Task HealthCheckEndpoint_Should_BeExposed_And_Return503_When_CheckFails()
	{
		// Arrange
		// fake & record all http calls in the test subject
		using (var httpTest = new HttpTest()) {
			httpTest.RespondWith("server error", 500);

			using var test = CreateApiTester<SampleApp.Startup>();
			test.Http().TestServer.PreserveExecutionContext = true;

			// Act
			var result = await test.Http()
				.RunAsync(HttpMethod.Get, "/health");

			// Assert
			System.Text.Json.JsonElement response = result.GetValue<dynamic>();
			var status = response.GetProperty("healthReport").GetProperty("status").GetString();
			status.Should().Be("Unhealthy", because: "the health check was mocked to fail");
			httpTest.ShouldHaveMadeACall();
			httpTest.ShouldHaveCalled("https://www.mock-url.com/*")
				.WithVerb(HttpMethod.Head);
		}
	}