public async Task TestGetAccounts()
{
// Arrange
mockCacheService.Setup(_ => _.GetCache()).Returns(dummyCacheWithCodeAndAccessToken);
Cache cacheThatWasSet = null;
mockCacheService.Setup(_ => _.SetCache(It.IsAny <Cache>()))
.Callback <Cache>((cache) => cacheThatWasSet = cache);
SetupHttpClientForGetAccounts();
SetupHttpClientFactory();
SetupHttpRequestService();
// Act
List <Account> accounts = await httpRequestService.GetAccountsAsync();
// Assert
Assert.Equal(accounts[0].AccountId,
dummyAccountsResponseDTO.Accounts[0].AccountId);
Assert.Equal(accounts[1].AccountId,
dummyAccountsResponseDTO.Accounts[1].AccountId);
Assert.Equal(cacheThatWasSet.AccountsResponseDTO.Accounts[0].AccountId,
dummyAccountsResponseDTO.Accounts[0].AccountId);
Assert.Equal(cacheThatWasSet.AccountsResponseDTO.Accounts[1].AccountId,
dummyAccountsResponseDTO.Accounts[1].AccountId);
}