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#region Copyright notice and license
// Copyright 2018 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core;
using Grpc.Core.Interceptors;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
using Grpc.Core.Tests;
using NUnit.Framework;
namespace Grpc.Core.Interceptors.Tests
{
public class ClientInterceptorTest
{
const string Host = "127.0.0.1";
[Test]
public void AddRequestHeaderInClientInterceptor()
{
const string HeaderKey = "x-client-interceptor";
const string HeaderValue = "hello-world";
var helper = new MockServiceHelper(Host);
helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
{
var interceptorHeader = context.RequestHeaders.Last(m => (m.Key == HeaderKey)).Value;
Assert.AreEqual(interceptorHeader, HeaderValue);
return Task.FromResult("PASS");
});
var server = helper.GetServer();
server.Start();
var callInvoker = helper.GetChannel().Intercept(metadata =>
{
metadata = metadata ?? new Metadata();
metadata.Add(new Metadata.Entry(HeaderKey, HeaderValue));
return metadata;
});
Assert.AreEqual("PASS", callInvoker.BlockingUnaryCall(new Method<string, string>(MethodType.Unary, MockServiceHelper.ServiceName, "Unary", Marshallers.StringMarshaller, Marshallers.StringMarshaller), Host, new CallOptions(), ""));
}
[Test]
public void CheckInterceptorOrderInClientInterceptors()
{
var helper = new MockServiceHelper(Host);
helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
{
return Task.FromResult("PASS");
});
var server = helper.GetServer();
server.Start();
var stringBuilder = new StringBuilder();
var callInvoker = helper.GetChannel().Intercept(metadata =>
{
stringBuilder.Append("interceptor1");
return metadata;
}).Intercept(metadata =>
{
stringBuilder.Append("interceptor2");
return metadata;
}).Intercept(metadata =>
{
stringBuilder.Append("interceptor3");
return metadata;
});
Assert.AreEqual("PASS", callInvoker.BlockingUnaryCall(new Method<string, string>(MethodType.Unary, MockServiceHelper.ServiceName, "Unary", Marshallers.StringMarshaller, Marshallers.StringMarshaller), Host, new CallOptions(), ""));
Assert.AreEqual("interceptor3interceptor2interceptor1", stringBuilder.ToString());
}
private class CountingInterceptor : GenericInterceptor
{
protected override ClientCallHooks<TRequest, TResponse> InterceptCall<TRequest, TResponse>(ClientInterceptorContext<TRequest, TResponse> context, bool clientStreaming, bool serverStreaming, TRequest request)
{
if (!clientStreaming)
{
return null;
}
int counter = 0;
return new ClientCallHooks<TRequest, TResponse>
{
OnRequestMessage = m => { counter++; return m; },
OnUnaryResponse = x => (TResponse)(object)counter.ToString() // Cast to object first is needed to satisfy the type-checker
};
}
}
[Test]
public async Task CountNumberOfRequestsInClientInterceptors()
{
var helper = new MockServiceHelper(Host);
helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
{
var stringBuilder = new StringBuilder();
await requestStream.ForEachAsync(request =>
{
stringBuilder.Append(request);
return TaskUtils.CompletedTask;
});
await Task.Delay(100);
return stringBuilder.ToString();
});
var callInvoker = helper.GetChannel().Intercept(new CountingInterceptor());
var server = helper.GetServer();
server.Start();
var call = callInvoker.AsyncClientStreamingCall(new Method<string, string>(MethodType.ClientStreaming, MockServiceHelper.ServiceName, "ClientStreaming", Marshallers.StringMarshaller, Marshallers.StringMarshaller), Host, new CallOptions());
await call.RequestStream.WriteAllAsync(new string[] { "A", "B", "C" });
Assert.AreEqual("3", await call.ResponseAsync);
Assert.AreEqual(StatusCode.OK, call.GetStatus().StatusCode);
Assert.IsNotNull(call.GetTrailers());
}
}
}
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