public async Task Test_MockProvider_AuthenticateRequestAsync()
{
// Create a new instance of the MockProvider.
IProvider provider = new MockProvider(true);
// Create an empty message to authenticate.
var message = new HttpRequestMessage(HttpMethod.Get, new Uri("https://graph.microsoft.com/v1/me"));
// Use the provider to authenticate the message.
await provider.AuthenticateRequestAsync(message);
// Check for the absence of the SdkVersion header value on the empty message.
bool sdkVersionHeaderExists = message.Headers.TryGetValues("SdkVersion", out _);
Assert.IsFalse(sdkVersionHeaderExists, "SdkVersion header values should not exist on an empty request that does not originate from the SDK.");
// Check for the authorization header
Assert.IsNotNull(message.Headers.Authorization, "Authorization header was not found.");
Assert.AreEqual("Bearer", message.Headers.Authorization.Scheme);
Assert.AreEqual("{token:https://graph.microsoft.com/}", message.Headers.Authorization.Parameter);
}
