public async Task NonGenericCloudEventFunction()
{
var services = new ServiceCollection();
services.AddLogging();
HostingInternals.AddServicesForFunctionTarget(services, typeof(EventIdRememberingFunction));
var provider = services.BuildServiceProvider();
var function = provider.GetRequiredService <IHttpFunction>();
Assert.Equal(typeof(EventIdRememberingFunction), provider.GetRequiredService <HostingInternals.FunctionTypeProvider>().FunctionType);
string eventId = Guid.NewGuid().ToString();
var context = new DefaultHttpContext
{
Request =
{
// No actual content, but that's okay.
ContentType = "application/json",
Headers =
{
{ "ce-specversion", "1.0" },
{ "ce-source", "test" },
{ "ce-type", "test" },
{ "ce-id", eventId }
}
}
};
await function.HandleAsync(context);
Assert.Equal(eventId, EventIdRememberingFunction.LastEventId);
}
public async Task TargetFunction_EventFunction_Generic()
{
var services = new ServiceCollection();
services.AddLogging();
HostingInternals.AddServicesForFunctionTarget(services, typeof(StorageCloudEventFunction));
var provider = services.BuildServiceProvider();
var function = provider.GetRequiredService <IHttpFunction>();
Assert.Equal(typeof(StorageCloudEventFunction), provider.GetRequiredService <HostingInternals.FunctionTypeProvider>().FunctionType);
var eventId = Guid.NewGuid().ToString();
var context = new DefaultHttpContext
{
Request =
{
ContentType = "application/json",
Body = new MemoryStream(Encoding.UTF8.GetBytes("{\"name\": \"testdata\"}")),
Headers =
{
{ "ce-specversion", "1.0" },
{ "ce-source", "test" },
{ "ce-type", "test" },
{ "ce-id", eventId }
}
},
};
await function.HandleAsync(context);
Assert.Equal(eventId, StorageCloudEventFunction.LastEventId);
Assert.Equal("testdata", StorageCloudEventFunction.LastData.Name);
}
public void NonInstantiableFunctionType()
{
var services = new ServiceCollection();
services.AddLogging();
HostingInternals.AddServicesForFunctionTarget(services, typeof(NonInstantiableFunction));
// We only find out when we try to get an IHttpFunction that we can't actually instantiate the function.
var provider = services.BuildServiceProvider();
Assert.Throws <InvalidOperationException>(() => provider.GetRequiredService <IHttpFunction>());
}
public void FunctionTypeImplementsMultipleInterfaces()
{
var services = new ServiceCollection();
Assert.Throws <InvalidOperationException>(() => HostingInternals.AddServicesForFunctionTarget(services, typeof(MultipleCloudEventTypes)));
}
public void NonFunctionType()
{
var services = new ServiceCollection();
Assert.Throws <InvalidOperationException>(() => HostingInternals.AddServicesForFunctionTarget(services, typeof(NonFunction)));
}
/// <summary> /// Adds services required for the Functions Framework to use the specified function target type, which must /// implement one of the Functions Framework function interfaces. /// </summary> /// <remarks> /// If this method completes successfully, a binding for <see cref="IHttpFunction"/> will definitely /// have been added to the service collection. Other bindings may also be present, in order to adapt /// the function to <see cref="IHttpFunction"/>. /// </remarks> /// <param name="services">The service collection to configure.</param> /// <param name="type">The target function type.</param> /// <returns>The original service collection, for method chaining.</returns> public static IServiceCollection AddFunctionTarget(this IServiceCollection services, Type type) => HostingInternals.AddServicesForFunctionTarget(services, type);
/// <summary> /// Adds required services to the service collection within the given web host builder for the Functions Framework /// to use a target function from the given assembly. If the Functions Framework configuration within the web host /// builder (typically provided by command line arguments or environment variables) /// does not specify a target function, the assembly is scanned for a single compatible function type. /// </summary> /// <remarks> /// If this method completes successfully, a binding for <see cref="IHttpFunction"/> will definitely /// have been added to the service collection. Other bindings may also be present, in order to adapt /// the function to <see cref="IHttpFunction"/>. /// </remarks> /// <param name="services">The service collection to configure.</param> /// <param name="context">The context of the web host builder being configured.</param> /// <param name="assembly">The assembly expected to contain the Functions Framework target function.</param> /// <returns>The original builder, for method chaining.</returns> public static IServiceCollection AddFunctionTarget(this IServiceCollection services, WebHostBuilderContext context, Assembly assembly) => HostingInternals.AddServicesForFunctionTarget(services, HostingInternals.GetFunctionTarget(context, assembly));