[Enhancement] Communications library for non Apple platforms (#15)

This PR contains the work done to allow the `MakeURLRequestUseCase` use case to be used in non-Apple platforms, as it use has been restricted before.

To provide further details about the work done:
- [x] improved the `MakeURLRequestUseCase` use case to be available in non-Apple platforms;
- [x] moved the `TestEndpoint` helper endpoint to its own file;
- [x] moved some test cases files around;
- [x] updated some text in the `README` file.

Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Reviewed-on: #15

README.md

@@ -18,7 +18,7 @@ To provide further details about the libraries included in this package:
 * `Coordination`: protocols to implement the [Coordinator pattern](https://khanlou.com/2015/01/the-coordinator/) and some ready-to-use platform-specific concrete routers; 
 * `Core`: extensions we usually add to the base layer functionality and primitive types provided by the [Swift standard library](https://https://www.swift.org/documentation/#standard-library);
 * `Dependencies`: a ready-to-use, simple [Dependency Injection](https://en.wikipedia.org/wiki/Dependency_injection) mechanism that levers heavily on the [dynamic property wrappers](https://www.hackingwithswift.com/plus/intermediate-swiftui/creating-a-custom-property-wrapper-using-dynamicproperty) provided by the [Swift programming language](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/properties/#Projecting-a-Value-From-a-Property-Wrapper);
-* `Persistence`: protocols, extensions and a ready-to-use fetcher class to simplify the building of the [CoreData](https://developer.apple.com/documentation/coredata) persistence layer;
+* `Persistence` (*available for Apple platforms only*): protocols, extensions and a ready-to-use fetcher class to simplify the building of the [CoreData](https://developer.apple.com/documentation/coredata) persistence layer;
 
 ## Installation
 
@@ -73,6 +73,6 @@ In an opened Xcode project, it is required to follow these steps to install the
 
 ### Other considerations
 
-This library is fully supported on Apple platforms: *iOS*, *macOS*, *tvOS*, and *watchOS*. In addition, basic support for *Linux* platform has been added as well, but it is rather limited for the time being, but it is just a matter of time as the Foundation framework is [moving towards cross-platform support](https://www.swift.org/blog/foundation-preview-now-available). 
+This library is fully supported on Apple platforms: *iOS*, *macOS*, *tvOS*, and *watchOS*. In addition, basic support for *Linux* platform has been added as well, but it is rather limited for the time being. It is just a matter of time, though, as the Foundation framework is [moving towards cross-platform support](https://www.swift.org/blog/foundation-preview-now-available) by moving away from its dependency on legacy Objective-C components. 
 
 ⚠️ Please notice that this library only supports the [Swift Package Manager](https://www.swift.org/package-manager/), and that support for other dependency managers such as *Cocoapods* and *Carthage* has not been prioritised. 

Sources/Communications/Use Cases/MakeURLRequestUseCase.swift

@@ -10,9 +10,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if os(iOS) || os(macOS) || os(tvOS) || os(watchOS)
 import Foundation
 
+#if canImport(FoundationNetworking)
+import FoundationNetworking
+#endif
+
 /// This use case generate a url request out of a given endpoint.
 public struct MakeURLRequestUseCase {
     
@@ -56,4 +59,3 @@ public struct MakeURLRequestUseCase {
     }
 
 }
-#endif

Tests/Communications/Cases/Use Cases/MakeURLRequestUseCaseTests.swift

@@ -10,11 +10,14 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if os(iOS) || os(macOS) || os(tvOS) || os(watchOS)
 import Communications
 import Foundation
 import XCTest
 
+#if canImport(FoundationNetworking)
+import FoundationNetworking
+#endif
+
 final class MakeURLRequestUseCaseTests: XCTestCase {
 
     // MARK: Properties
@@ -111,35 +114,3 @@ final class MakeURLRequestUseCaseTests: XCTestCase {
     }
 
 }
-
-// MARK: - TestEndpoint
-
-private struct TestEndpoint: Endpoint {
-
-    // MARK: Properties
-    
-    let scheme: String = "http"
-    let host: String = "www.something.com"
-    let port: Int?
-    let path: String = "/path/to/endpoint"
-    let parameters: Parameters
-    let method: HTTPRequestMethod = .get
-    let headers: Headers
-    let body: Data?
-
-    // MARK: Initialisers
-    
-    init(
-        port: Int? = nil,
-        parameters: Parameters = [:],
-        headers: Headers = [:],
-        body: Data? = nil
-    ) {
-        self.port = port
-        self.parameters = parameters
-        self.headers = headers
-        self.body = body
-    }
-
-}
-#endif

Tests/Communications/Helpers/Endpoints/TestEndpoint.swift

@@ -0,0 +1,43 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftLibs open source project
+//
+// Copyright (c) 2023 Röck+Cöde VoF. and the SwiftLibs project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftLibs project authors
+//
+//===----------------------------------------------------------------------===//
+
+import Communications
+import Foundation
+
+struct TestEndpoint: Endpoint {
+
+    // MARK: Properties
+    
+    let scheme: String = "http"
+    let host: String = "www.something.com"
+    let port: Int?
+    let path: String = "/path/to/endpoint"
+    let parameters: Parameters
+    let method: HTTPRequestMethod = .get
+    let headers: Headers
+    let body: Data?
+
+    // MARK: Initialisers
+    
+    init(
+        port: Int? = nil,
+        parameters: Parameters = [:],
+        headers: Headers = [:],
+        body: Data? = nil
+    ) {
+        self.port = port
+        self.parameters = parameters
+        self.headers = headers
+        self.body = body
+    }
+
+}