public async Task HappyPathNewSetting()
{
var receiver = new FakeReceiver("fake");
MessagingConfigurationProvider provider = typeof(MessagingConfigurationProvider).New(receiver, null);
var newSettings = @"{
""foo"": ""abc""
}";
var message = new FakeReceiverMessage(newSettings);
var reloaded = false;
ChangeToken.OnChange(provider.GetReloadToken, () => reloaded = true);
var dataBefore = GetData(provider);
// Simulate the FakeReceiver receiving a message.
await receiver.MessageHandler.OnMessageReceivedAsync(receiver, message);
// The protected Data property should have been replaced.
GetData(provider).Should().NotBeSameAs(dataBefore);
// Data should contain the new settings.
GetData(provider).Should().ContainKey("foo");
GetData(provider)["foo"].Should().Be("abc");
// It should report that it has been reloaded.
reloaded.Should().BeTrue();
// The received message should have been handled by acknowledging it.
message.Handled.Should().BeTrue();
message.HandledBy.Should().Be(nameof(message.AcknowledgeAsync));
}
public async Task InvalidMessage()
{
var receiver = new FakeReceiver("fake");
MessagingConfigurationProvider provider = typeof(MessagingConfigurationProvider).New(receiver, null);
var reloaded = false;
ChangeToken.OnChange(provider.GetReloadToken, () => reloaded = true);
var newSettings = "This is {not] a [valid} JSON string: \"";
var message = new FakeReceiverMessage(newSettings);
var dataBefore = GetData(provider);
// Simulate the FakeReceiver receiving a message.
await receiver.MessageHandler.OnMessageReceivedAsync(receiver, message);
// The protected Data property should not have been replaced.
GetData(provider).Should().BeSameAs(dataBefore);
// It should report that it has been reloaded.
reloaded.Should().BeFalse();
// The received message should have been handled by acknowledging it.
message.Handled.Should().BeTrue();
message.HandledBy.Should().Be(nameof(message.RejectAsync));
}
public void ConstructorSetsReceiverProperty()
{
var receiver = new FakeReceiver("fake");
var source = new MessagingConfigurationSource(receiver);
source.Receiver.Should().BeSameAs(receiver);
}
public void ConstructorLeavesDataEmpty()
{
var receiver = new FakeReceiver("fake");
MessagingConfigurationProvider provider = typeof(MessagingConfigurationProvider).New(receiver, null);
GetData(provider).Should().BeEmpty();
}
public void ConstructorSetsReceiverProperty()
{
var receiver = new FakeReceiver("fake");
MessagingConfigurationProvider provider = typeof(MessagingConfigurationProvider).New(receiver, null);
provider.Receiver.Should().BeSameAs(receiver);
}
public void ConstructorSetsSettingFilterProperty()
{
var receiver = new FakeReceiver("fake");
var filter = new FakeSettingFilter();
MessagingConfigurationProvider provider = typeof(MessagingConfigurationProvider).New(receiver, filter);
provider.SettingFilter.Should().BeSameAs(filter);
}
public void ConstructorThrowsIfReceiverIsAlreadyStarted()
{
var receiver = new FakeReceiver("fake");
receiver.Start(m => m.AcknowledgeAsync());
Action action = () => new MessagingConfigurationSource(receiver);
action.Should().ThrowExactly <ArgumentException>().WithMessage("The receiver is already started.*receiver*");
}
public void ConstructorStartsTheReceiver()
{
var receiver = new FakeReceiver("fake");
receiver.MessageHandler.Should().BeNull();
MessagingConfigurationProvider provider = typeof(MessagingConfigurationProvider).New(receiver, null);
receiver.MessageHandler.Should().NotBeNull();
}
public void BuildMethodReturnsSameMessagingConfigurationProviderEachTime()
{
var receiver = new FakeReceiver("fake");
var source = new MessagingConfigurationSource(receiver);
var provider1 = source.Build(null);
var provider2 = source.Build(null);
provider1.Should().BeSameAs(provider2);
}
public void ConstructorThrowsIfReceiverIsUsedByAnotherMessagingConfigurationSource()
{
var receiver = new FakeReceiver("fake");
// Create a source with the receiver and throw it away.
new MessagingConfigurationSource(receiver);
// Passing the same receiver to another source causes it to throw.
Action action = () => new MessagingConfigurationSource(receiver);
action.Should().ThrowExactly <ArgumentException>().WithMessage("The same instance of IReceiver cannot be used to create multiple instances of MessagingConfigurationSource.*receiver*");
}
public void BuildMethodReturnsMessagingConfigurationProvider()
{
var receiver = new FakeReceiver("fake");
var filter = new FakeSettingFilter();
var source = new MessagingConfigurationSource(receiver, filter);
var provider = source.Build(null);
provider.Should().BeOfType <MessagingConfigurationProvider>();
var messagingProvider = (MessagingConfigurationProvider)provider;
messagingProvider.Receiver.Should().BeSameAs(receiver);
messagingProvider.SettingFilter.Should().BeSameAs(filter);
}
public void AddRockLibMessagingProviderExtensionMethod2AddsAMessagingConfigurationSourceToTheConfigurationBuilder()
{
var receiver = new FakeReceiver("fake");
var filter = new FakeSettingFilter();
var builder = new ConfigurationBuilder();
builder.AddRockLibMessagingProvider(receiver, filter);
builder.Sources.Should().HaveCount(1);
builder.Sources[0].Should().BeOfType <MessagingConfigurationSource>();
var source = (MessagingConfigurationSource)builder.Sources[0];
source.Receiver.Should().BeSameAs(receiver);
source.SettingFilter.Should().BeSameAs(filter);
}
