private async Task AccessToken_GetOrAdd(int userId, int contentId = 0, string feature = null)
{
var timeout1 = TimeSpan.FromMinutes(3);
var timeout2 = TimeSpan.FromMinutes(10);
var timeout3 = TimeSpan.FromMinutes(20);
// create three different tokens
var savedToken1 = await AccessTokenVault.CreateTokenAsync(userId, timeout1, contentId, feature,
CancellationToken.None).ConfigureAwait(false);
var savedToken2 = await AccessTokenVault.CreateTokenAsync(userId, timeout2, contentId, feature,
CancellationToken.None).ConfigureAwait(false);
var savedToken3 = await AccessTokenVault.CreateTokenAsync(userId, timeout3, contentId, feature,
CancellationToken.None).ConfigureAwait(false);
// ACTION: get a token with the same parameters
var token = await AccessTokenVault.GetOrAddTokenAsync(userId, timeout3, contentId, feature,
CancellationToken.None).ConfigureAwait(false);
// ASSERT: we should get the last one
AssertTokensAreEqual(savedToken3, token);
// ACTION: get a token with shorter expiration time
token = await AccessTokenVault.GetOrAddTokenAsync(userId, timeout2, contentId, feature,
CancellationToken.None).ConfigureAwait(false);
// ASSERT: we should get the previous one
AssertTokensAreEqual(savedToken2, token);
// ACTION: get a token with an even shorter expiration time
token = await AccessTokenVault.GetOrAddTokenAsync(userId, TimeSpan.FromMinutes(7), contentId, feature,
CancellationToken.None).ConfigureAwait(false);
// ASSERT: we should get a totally new one, because the first
// token (savedToken1) expires too soon.
Assert.AreNotEqual(savedToken1.Value, token.Value);
Assert.AreNotEqual(savedToken2.Value, token.Value);
Assert.AreNotEqual(savedToken3.Value, token.Value);
Assert.IsTrue(token.ExpirationDate < savedToken2.ExpirationDate);
}