public async Task allow_refresh_an_accessToken_from_refresh_token()
{
var server = new TestServerBuilder()
.WithSuccessAuthentication()
.WithInMemoryStore()
.Build();
var client = server.CreateClient();
var response = await client.PostAsync("/token", GrantTypes.APasswordGrantType());
response.EnsureSuccessStatusCode();
var tokenResponse = await ReadRequestResponseToJwtTokenResponse(response);
response = await client.PostAsync("/token", GrantTypes.ARefreshTokenGranType(tokenResponse.RefreshToken));
response.EnsureSuccessStatusCode();
var refreshTokenResponse = await ReadRequestResponseToJwtTokenResponse(response);
refreshTokenResponse.AccessToken.Should().NotBeEmpty();
refreshTokenResponse.RefreshToken.Should().NotBeEmpty();
refreshTokenResponse.AccessToken.Should().NotBe(tokenResponse.AccessToken);
refreshTokenResponse.RefreshToken.Should().NotBe(tokenResponse.RefreshToken);
}