✅ Add unit testing

Sources/Hermes/Hermes.swift

@@ -11,6 +11,7 @@ public enum NetworkError: Error {
     case serverError(String)
     case decodingError
     case invalidResponse
+    case notFound
 }
 
 extension NetworkError: LocalizedError {
@@ -19,18 +20,19 @@ extension NetworkError: LocalizedError {
             case .badRequest:
                 return NSLocalizedString("Unable to perform request", comment: "badRequestError")
             case .serverError(let errorMessage):
-                print(errorMessage)
                 return NSLocalizedString(errorMessage, comment: "serverError")
             case .decodingError:
                 return NSLocalizedString("Unable to decode successfully", comment: "decodingError")
             case .invalidResponse:
                 return NSLocalizedString("Invalid response", comment: "invalidResponse")
+            case .notFound:
+                return NSLocalizedString("Not Found", comment: "notFound")
         }
     }
 }
 
 public enum HTTPMethod {
-    case get([URLQueryItem])
+    case get([URLQueryItem]? = nil)
     case post(Data?)
     case put(Data?)
     case patch(Data?)
@@ -110,10 +112,21 @@ public struct Hermes {
         
         let (data, response) = try await session.data(for: request)
         
-        guard let _ = response as? HTTPURLResponse else {
+        guard let response = response as? HTTPURLResponse else {
             throw NetworkError.invalidResponse
         }
         
+        if response.statusCode != 200 {
+            switch response.statusCode {
+                case 404:
+                    throw NetworkError.notFound
+                case 500:
+                    throw NetworkError.serverError(response.description)
+                default:
+                    throw NetworkError.invalidResponse
+            }
+        }
+        
         guard let result = try? JSONDecoder().decode(resource.modelType, from: data) else {
             throw NetworkError.decodingError
         }

Tests/HermesTests/HermesTests.swift

@@ -2,11 +2,126 @@ import XCTest
 @testable import Hermes
 
 final class HermesTests: XCTestCase {
-    func testExample() throws {
-        // XCTest Documentation
-        // https://developer.apple.com/documentation/xctest
     
-        // Defining Test Cases and Test Methods
-        // https://developer.apple.com/documentation/xctest/defining_test_cases_and_test_methods
+    func testGetRequest() async throws {
+        let hermes = Hermes()
+        let queryParams = [URLQueryItem(name: "foo", value: "bar")]
+        let resource = Resource(url: URL(string: "https://httpbin.org/get")!, method: .get(queryParams), modelType: GetResponse.self)
+        
+        let getResponse = try await hermes.load(resource)
+        
+        XCTAssertEqual(getResponse.url, "https://httpbin.org/get?foo=bar")
+        XCTAssertEqual(getResponse.args.count, 1)
+        XCTAssertGreaterThan(getResponse.headers.count, 0)
+    }
+    
+    func testPostRequest() async throws {
+        let hermes = Hermes()
+        let postDatas = try? JSONEncoder().encode(["foo": "bar"])
+        let resource = Resource(url: URL(string: "https://httpbin.org/post")!, method: .post(postDatas), modelType: PostResponse.self)
+        
+        let postResponse = try await hermes.load(resource)
+        
+        XCTAssertEqual(postResponse.url, "https://httpbin.org/post")
+        XCTAssertEqual(postResponse.args.count, 0)
+        XCTAssertNotNil(postResponse.json)
+        XCTAssertEqual(postResponse.json!.count, 1)
+        XCTAssertGreaterThan(postResponse.headers.count, 0)
+    }
+    
+    func testPutRequest() async throws {
+        let hermes = Hermes()
+        let postDatas = try? JSONEncoder().encode(["foo": "bar"])
+        let resource = Resource(url: URL(string: "https://httpbin.org/put")!, method: .put(postDatas), modelType: PostResponse.self)
+        
+        let putResponse = try await hermes.load(resource)
+        
+        XCTAssertEqual(putResponse.url, "https://httpbin.org/put")
+        XCTAssertEqual(putResponse.args.count, 0)
+        XCTAssertNotNil(putResponse.json)
+        XCTAssertEqual(putResponse.json!.count, 1)
+        XCTAssertGreaterThan(putResponse.headers.count, 0)
+    }
+    
+    func testPatchRequest() async throws {
+        let hermes = Hermes()
+        let postDatas = try? JSONEncoder().encode(["foo": "bar"])
+        let resource = Resource(url: URL(string: "https://httpbin.org/patch")!, method: .patch(postDatas), modelType: PostResponse.self)
+        
+        let patchResponse = try await hermes.load(resource)
+        
+        XCTAssertEqual(patchResponse.url, "https://httpbin.org/patch")
+        XCTAssertEqual(patchResponse.args.count, 0)
+        XCTAssertNotNil(patchResponse.json)
+        XCTAssertEqual(patchResponse.json!.count, 1)
+        XCTAssertGreaterThan(patchResponse.headers.count, 0)
+    }
+    
+    func testDeleteRequest() async throws {
+        let hermes = Hermes()
+        let resource = Resource(url: URL(string: "https://httpbin.org/delete")!, method: .delete, modelType: PostResponse.self)
+        
+        let deleteResponse = try await hermes.load(resource)
+        
+        XCTAssertEqual(deleteResponse.url, "https://httpbin.org/delete")
+        XCTAssertEqual(deleteResponse.args.count, 0)
+        XCTAssertNil(deleteResponse.json)
+        XCTAssertGreaterThan(deleteResponse.headers.count, 0)
+    }
+    
+    func testNotFound() async throws {
+        let hermes = Hermes()
+        let resource = Resource(url: URL(string: "https://httpbin.org/status/404")!, method: .get(), modelType: GetResponse.self)
+        
+        do {
+            let _ = try await hermes.load(resource)
+        } catch NetworkError.notFound {
+            XCTAssert(true)
         }
     }
+    
+    func testServerError() async throws {
+        let hermes = Hermes()
+        let resource = Resource(url: URL(string: "https://httpbin.org/status/500")!, method: .get(), modelType: GetResponse.self)
+        
+        do {
+            let _ = try await hermes.load(resource)
+        } catch NetworkError.serverError(_) {
+            XCTAssert(true)
+        }
+    }
+    
+    func testDecodeError() async throws {
+        let hermes = Hermes()
+        let resource = Resource(url: URL(string: "https://httpbin.org/get")!, method: .get(), modelType: DummyResponse.self)
+        
+        do {
+            let _ = try await hermes.load(resource)
+        } catch NetworkError.decodingError {
+            XCTAssert(true)
+        }
+    }
+}
+
+struct GetResponse: Codable {
+    let args: [String: String]
+    let headers: [String: String]
+    let origin: String
+    let url: String
+}
+
+struct PostResponse: Codable {
+    let args: [String: String]
+    let data: String
+    let files: [String: String]
+    let form: [String: String]
+    let headers: [String: String]
+    let json: [String: String]?
+    let origin: String
+    let url: String
+}
+
+struct DummyResponse: Codable {
+    let dumb: Int
+    let dumber: Double
+}