[#14] Add interceptors

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.Tests/Mocks/SessionMock.cs

@@ -0,0 +1,57 @@
+using Moq;
+using FrostFS.Session;
+using Grpc.Core;
+using FrostFS.SDK.ClientV2;
+using Google.Protobuf;
+
+namespace FrostFS.SDK.Tests;
+
+public class SessionMockFactory(string key) : ServiceBase(key)
+{
+    public byte[]? SessionId { get; set; }
+
+    public byte[]? SessionKey { get; set; }
+    
+    public Mock<SessionService.SessionServiceClient> GetMock()
+    {
+        var mock = new Mock<SessionService.SessionServiceClient>();
+
+        Random rand = new();
+        SessionId = new byte[32];
+        SessionKey = new byte[32];
+
+        rand.NextBytes(SessionId);
+        rand.NextBytes(SessionKey);
+
+        CreateResponse response = new()
+        {
+            Body = new CreateResponse.Types.Body
+            {
+                Id = ByteString.CopyFrom(SessionId),
+                SessionKey = ByteString.CopyFrom(SessionId)
+            },
+            MetaHeader = ResponseMetaHeader
+        };
+
+        response.VerifyHeader = GetResponseVerificationHeader(response);
+
+        mock.Setup(x => x.CreateAsync(
+            It.IsAny<CreateRequest>(),
+            It.IsAny<Metadata>(),
+            It.IsAny<DateTime?>(),
+            It.IsAny<CancellationToken>()))
+             .Returns((CreateRequest r, Metadata m, DateTime? dt, CancellationToken ct) =>
+                {
+                    Verifier.CheckRequest(r);
+
+                     return new AsyncUnaryCall<CreateResponse>(
+                        Task.FromResult(response),
+                        Task.FromResult(ResponseMetaData),
+                        () => new Grpc.Core.Status(StatusCode.OK, string.Empty),
+                        () => ResponseMetaData,
+                        () => { });
+                });
+
+        return mock;
+    }
+}