public void ProcessMessages_PluginMessage_SendsErrorWhenUnregistered()
{
var assemblyLoadContext = CreateTestAssemblyLoadContext <MessageTestPlugin>();
var serviceProvider = new TestServiceProvider();
object rawWrappedData = null;
var pluginHandler = new PluginHandler(serviceProvider, (data) => rawWrappedData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(MessageTestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var unregisterPluginMessage = new PluginMessage
{
MessageName = "UnregisterPlugin",
PluginId = RandomGuidId
};
var pluginMessage = new PluginMessage
{
Data = new JObject
{
{ "Data", "Hello Plugin" },
},
MessageName = "PluginMessage",
PluginId = RandomGuidId
};
var expectedErrorMessage =
$"Message received for unregistered plugin id '{RandomGuidId}'. Plugins must first be registered " +
"before they can receive messages.";
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(unregisterPluginMessage);
pluginHandler.OnReceive(pluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
var messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawWrappedData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
var responseMessage = Assert.IsType <PluginResponseMessage>(messageBrokerData.Data);
Assert.False(responseMessage.Success);
Assert.Equal("PluginMessage", responseMessage.MessageName, StringComparer.Ordinal);
Assert.Equal(expectedErrorMessage, responseMessage.Error, StringComparer.Ordinal);
}
public void ProcessMessages_PluginMessage_SendsErrorForPluginExceptions()
{
var assemblyLoadContext = CreateTestAssemblyLoadContext <CreationTestPlugin>();
var creationChecker = new PluginTypeCreationChecker();
var serviceLookups = new Dictionary <Type, object>
{
{ typeof(PluginTypeCreationChecker), creationChecker }
};
var serviceProvider = new TestServiceProvider(serviceLookups);
object rawWrappedData = null;
var pluginHandler = new PluginHandler(serviceProvider, (data) => rawWrappedData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(CreationTestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var pluginMessage = new PluginMessage
{
Data = new JObject
{
{ "Data", "Hello Plugin" },
},
MessageName = "PluginMessage",
PluginId = RandomGuidId
};
var expectedErrorMessage =
$"Plugin '{RandomGuidId}' encountered an exception when processing a message. Exception message: 'Cannot process messages.'";
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(pluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
var messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawWrappedData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
var responseMessage = Assert.IsType <PluginResponseMessage>(messageBrokerData.Data);
Assert.False(responseMessage.Success);
Assert.Equal("PluginMessage", responseMessage.MessageName, StringComparer.Ordinal);
Assert.Equal(expectedErrorMessage, responseMessage.Error, StringComparer.Ordinal);
}
public void ProcessMessages_RegisterPlugin_CreatesPluginWithCustomMessageBroker()
{
var assemblyLoadContext = CreateTestAssemblyLoadContext <MessageBrokerCreationTestPlugin>();
var creationChecker = new PluginTypeCreationChecker();
object rawMessageBrokerData = null;
var pluginMessageBroker = new PluginMessageBroker(RandomGuidId, (data) => rawMessageBrokerData = data);
var serviceLookups = new Dictionary <Type, object>
{
{ typeof(PluginTypeCreationChecker), creationChecker },
{ typeof(IPluginMessageBroker), pluginMessageBroker }
};
var serviceProvider = new TestServiceProvider(serviceLookups);
var pluginHandler = new PluginHandler(serviceProvider, (_) => { });
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(MessageBrokerCreationTestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var pluginMessage = new PluginMessage
{
Data = new JObject
{
{ "Data", "Hello Plugin" },
},
MessageName = "PluginMessage",
PluginId = RandomGuidId
};
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(pluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
Assert.True(creationChecker.Created);
Assert.NotNull(rawMessageBrokerData);
var messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawMessageBrokerData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
Assert.Equal("Created", messageBrokerData.Data.ToString(), StringComparer.Ordinal);
}
public void ProcessMessages_PluginMessage_ProcessesMessages()
{
var assemblyLoadContext = CreateTestAssemblyLoadContext <MessageTestPlugin>();
var serviceProvider = new TestServiceProvider();
object rawMessageBrokerData = null;
var pluginHandler = new PluginHandler(serviceProvider, (data) => rawMessageBrokerData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(MessageTestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var pluginMessage = new PluginMessage
{
Data = new JObject
{
{ "Data", "Hello Plugin" },
},
MessageName = "PluginMessage",
PluginId = RandomGuidId
};
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(pluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
Assert.NotNull(rawMessageBrokerData);
var messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawMessageBrokerData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
var actualMessage = (string)messageBrokerData.Data;
Assert.Equal("Hello Plugin!", actualMessage, StringComparer.Ordinal);
}
public void ProcessMessages_UnregisterPlugin_SendsErrorWhenUnregisteringPluginMoreThanOnce()
{
var assemblyLoadContext = CreateTestAssemblyLoadContext <TestPlugin>();
var serviceProvider = new TestServiceProvider();
object rawWrappedData = null;
var pluginHandler = new PluginHandler(serviceProvider, (data) => rawWrappedData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(TestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var unregisterPluginMessage = new PluginMessage
{
MessageName = "UnregisterPlugin",
PluginId = RandomGuidId
};
var expectedErrorMessage =
$"No plugin with id '{RandomGuidId}' has been registered. Cannot unregister plugin.";
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(unregisterPluginMessage);
pluginHandler.OnReceive(unregisterPluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
var messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawWrappedData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
var responseMessage = Assert.IsType <PluginResponseMessage>(messageBrokerData.Data);
Assert.False(responseMessage.Success);
Assert.Equal("UnregisterPlugin", responseMessage.MessageName, StringComparer.Ordinal);
Assert.Equal(expectedErrorMessage, responseMessage.Error, StringComparer.Ordinal);
}
public void ProcessMessages_RegisterPlugin_CreatesPluginWithAssemblyLoadContext()
{
var assemblyLoadContext = CreateTestAssemblyLoadContext <AssemblyLoadContextRelayTestPlugin>();
var serviceLookups = new Dictionary <Type, object>();
var serviceProvider = new TestServiceProvider(serviceLookups);
object rawWrappedData = null;
var pluginHandler = new PluginHandler(
serviceProvider, (data) => rawWrappedData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(AssemblyLoadContextRelayTestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var pluginMessage = new PluginMessage
{
Data = new JObject
{
{ "Data", "Hello Plugin" },
},
MessageName = "PluginMessage",
PluginId = RandomGuidId
};
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(pluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
Assert.NotNull(rawWrappedData);
var wrappedData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawWrappedData);
Assert.Equal(RandomGuidId, wrappedData.PluginId);
Assert.Same(assemblyLoadContext, wrappedData.Data);
}
public void OnReceive_DoesNotProcessMessages()
{
object rawMessageBrokerData = null;
var serviceProvider = new TestServiceProvider();
var pluginHandler = new PluginHandler(serviceProvider, (data) => rawMessageBrokerData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(TestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var unregisterPluginMessage = new PluginMessage
{
MessageName = "UnregisterPlugin",
PluginId = RandomGuidId
};
var pluginMessage = new PluginMessage
{
Data = new JObject
{
{ "Data", "Hello Plugin" },
},
MessageName = "PluginMessage",
PluginId = RandomGuidId
};
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.OnReceive(pluginMessage);
pluginHandler.OnReceive(unregisterPluginMessage);
Assert.Null(rawMessageBrokerData);
}
public void ProcessMessages_UnregisterPlugin_RemovesFaultedPlugins()
{
var pluginType = typeof(MessageBrokerCreationTestPlugin);
var typeNameLookups = new Dictionary <string, Type>
{
{ pluginType.FullName, pluginType }
};
var testAssembly = new TestAssembly(typeNameLookups);
var assemblyLookups = new Dictionary <string, Assembly>
{
{ "CustomAssembly", testAssembly }
};
var assemblyLoadContext = new FailureAssemblyLoadContext(assemblyLookups);
var creationChecker = new PluginTypeCreationChecker();
var serviceLookups = new Dictionary <Type, object>
{
{ typeof(PluginTypeCreationChecker), creationChecker }
};
var serviceProvider = new TestServiceProvider(serviceLookups);
object rawMessageBrokerData = null;
var pluginHandler = new PluginHandler(serviceProvider, (data) => rawMessageBrokerData = data);
var registerPluginMessage = new PluginMessage
{
Data = new JObject
{
{ "AssemblyName", "CustomAssembly" },
{ "TypeName", typeof(MessageBrokerCreationTestPlugin).FullName },
},
MessageName = "RegisterPlugin",
PluginId = RandomGuidId
};
var unregisterPluginMessage = new PluginMessage
{
MessageName = "UnregisterPlugin",
PluginId = RandomGuidId
};
pluginHandler.OnReceive(registerPluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
var messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawMessageBrokerData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
var responseMessage = Assert.IsType <PluginResponseMessage>(messageBrokerData.Data);
Assert.False(responseMessage.Success);
Assert.Equal("RegisterPlugin", responseMessage.MessageName, StringComparer.Ordinal);
Assert.NotEmpty(responseMessage.Error);
Assert.False(creationChecker.Created);
pluginHandler.OnReceive(unregisterPluginMessage);
pluginHandler.ProcessMessages(assemblyLoadContext);
messageBrokerData = Assert.IsType <PluginMessageBroker.PluginMessageWrapperData>(rawMessageBrokerData);
Assert.Equal(RandomGuidId, messageBrokerData.PluginId);
responseMessage = Assert.IsType <PluginResponseMessage>(messageBrokerData.Data);
Assert.True(responseMessage.Success);
Assert.Equal("UnregisterPlugin", responseMessage.MessageName, StringComparer.Ordinal);
Assert.Null(responseMessage.Error);
Assert.False(creationChecker.Created);
}