feat: Cache tokens between calls (#19)

tests/VMelnalksnis.NordigenDotNet.DependencyInjection.Tests/ServiceCollectionExtensionsTests.cs

@@ -28,7 +28,7 @@ public sealed class ServiceCollectionExtensionsTests
 
 		var serviceCollection = new ServiceCollection();
 
-		serviceCollection.AddNordigenDotNet(configuration, DateTimeZoneProviders.Tzdb);
+		serviceCollection.AddNordigenDotNet(configuration, SystemClock.Instance, DateTimeZoneProviders.Tzdb);
 
 		var serviceProvider = serviceCollection.BuildServiceProvider();
 		var nordigenClient = serviceProvider.GetRequiredService<INordigenClient>();

tests/VMelnalksnis.NordigenDotNet.Tests.Integration/ServiceProviderFixture.cs

@@ -10,6 +10,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 
 using NodaTime;
+using NodaTime.Testing;
 
 using VMelnalksnis.NordigenDotNet.DependencyInjection;
 
@@ -22,16 +23,20 @@ public sealed class ServiceProviderFixture
 
 	public ServiceProviderFixture()
 	{
+		Clock = new(SystemClock.Instance.GetCurrentInstant());
+
 		var configuration = new ConfigurationBuilder()
 			.AddEnvironmentVariables()
 			.AddUserSecrets<ServiceProviderFixture>()
 			.Build();
 
 		var serviceCollection = new ServiceCollection();
-		serviceCollection.AddNordigenDotNet(configuration, DateTimeZoneProviders.Tzdb);
+		serviceCollection.AddNordigenDotNet(configuration, Clock, DateTimeZoneProviders.Tzdb);
 
 		_serviceProvider = serviceCollection.BuildServiceProvider();
 	}
 
+	public FakeClock Clock { get; }
+
 	public INordigenClient NordigenClient => _serviceProvider.GetRequiredService<INordigenClient>();
 }

tests/VMelnalksnis.NordigenDotNet.Tests.Integration/Tokens/TokenDelegatingHandlerTests.cs

@@ -0,0 +1,35 @@
+// Copyright 2022 Valters Melnalksnis
+// Licensed under the Apache License 2.0.
+// See LICENSE file in the project root for full license information.
+
+using System.Linq;
+using System.Threading.Tasks;
+
+using NodaTime.Testing;
+
+namespace VMelnalksnis.NordigenDotNet.Tests.Integration.Tokens;
+
+public sealed class TokenDelegatingHandlerTests : IClassFixture<ServiceProviderFixture>
+{
+	private readonly FakeClock _fakeClock;
+	private readonly INordigenClient _nordigenClient;
+
+	public TokenDelegatingHandlerTests(ServiceProviderFixture serviceProviderFixture)
+	{
+		_fakeClock = serviceProviderFixture.Clock;
+		_nordigenClient = serviceProviderFixture.NordigenClient;
+	}
+
+	[Theory]
+	[InlineData(86400)]
+	[InlineData(2592000)]
+	public async Task ShouldSucceedAfterPeriod(int seconds)
+	{
+		var expectedAgreement = await _nordigenClient.Agreements.Get().OrderBy(a => a.Created).FirstAsync();
+
+		_fakeClock.AdvanceSeconds(seconds);
+
+		var agreement = await _nordigenClient.Agreements.Get().OrderBy(a => a.Created).FirstAsync();
+		agreement.Should().BeEquivalentTo(expectedAgreement);
+	}
+}

tests/VMelnalksnis.NordigenDotNet.Tests.Integration/VMelnalksnis.NordigenDotNet.Tests.Integration.csproj

@@ -15,6 +15,7 @@
 		<PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="6.0.1"/>
 		<PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="6.0.1"/>
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0"/>
+		<PackageReference Include="NodaTime.Testing" Version="3.1.0"/>
 		<PackageReference Include="System.Linq.Async" Version="6.0.1"/>
 	</ItemGroup>