fix testSimpleGetRequest on Linux

Author: dnadoba

Tests/AsyncHTTPClientTests/AsyncRequestTests.swift

@@ -272,8 +272,10 @@ final class AsyncRequestTests: XCTestCase {
                     var next = next
                     partialResult.writeBuffer(&next)
                 }
-
-                XCTAssertEqual(body.readString(length: body.readableBytes)!, #"{"connectionNumber":0,"data":"","requestNumber":1}"#)
+                XCTAssertEqual(
+                    try body.readJSONDecodable(RequestInfo.self, length: body.readableBytes),
+                    RequestInfo(data: "", requestNumber: 1, connectionNumber: 0)
+                )
             } catch {
                 XCTFail("We don't like errors in tests: \(error)")
             }

Tests/AsyncHTTPClientTests/HTTPClientTestUtils.swift

@@ -641,7 +641,7 @@ internal struct HTTPResponseBuilder {
     }
 }
 
-internal struct RequestInfo: Codable {
+internal struct RequestInfo: Codable, Equatable {
     var data: String
     var requestNumber: Int
     var connectionNumber: Int