THRIFT-5125: Swift server does not work using present code
Client: Swift
Patch: Jano Svitok

This closes #2038
diff --git a/lib/swift/Tests/ThriftTests/TSocketServerTests.swift b/lib/swift/Tests/ThriftTests/TSocketServerTests.swift
new file mode 100644
index 0000000..a00ebbc
--- /dev/null
+++ b/lib/swift/Tests/ThriftTests/TSocketServerTests.swift
@@ -0,0 +1,55 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements. See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership. The ASF licenses this file
+* to you 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.
+*/
+
+import XCTest
+import Foundation
+@testable import Thrift
+
+private protocol CalculatorService { }
+
+private class Calculator: CalculatorService { }
+
+private class CalculatorProcessor: TProcessor {
+  private let service: CalculatorService
+
+  init(service: CalculatorService) {
+    self.service = service
+  }
+
+  var processCalled = false
+  func process(on inProtocol: TProtocol, outProtocol: TProtocol) throws {
+    processCalled = true
+  }
+}
+
+class TSocketServerTests: XCTestCase {
+  func testInit() throws {
+    let service: CalculatorService = Calculator()
+    let processor: CalculatorProcessor = CalculatorProcessor(service: service)
+    let _: TSocketServer<TBinaryProtocol, TBinaryProtocol, CalculatorProcessor> = 
+      try TSocketServer(port: 9090, inProtocol: TBinaryProtocol.self, outProtocol: TBinaryProtocol.self, processor: processor)
+  }
+
+  static var allTests : [(String, (TSocketServerTests) -> () throws -> Void)] {
+    return [
+      ("testInit", testInit),
+    ]
+  }
+
+}