public void WhenListUserAccountsWithUserName_ThenReturnsAccountsByUsername()
{
var account = new UserAccount();
storageProvider.Setup(sp => sp.Find(It.IsAny <string>()))
.Returns(new[]
{
account
});
IEnumerable <IUserAccount> result = manager.ListUserAccounts("auserid", "foo", null);
storageProvider.Verify(sp => sp.Find(It.IsAny <string>()), Times.Once());
storageProvider.Verify(sp => sp.BuildQuery("Username", QueryOperator.EQ, "foo"), Times.Once());
Assert.Equal(1, result.Count());
Assert.Equal(account, result.First());
}