Add PATCH support (#134)

* Add PATCH support

* Listed change in Changelog.md

* Use space for indentation.

* Missing indentation fix

* More indentation fixes

* missing separation

Changelog.md

@@ -3,6 +3,8 @@
 ### HEAD
 --------------
 
+- Added `PATCH` method support
+
 ### 2.0.0
 -----------
 

Source/Router.swift

@@ -91,7 +91,7 @@ public struct Response: ResponseFieldsProvider {
 /**
  A Router object is an object in charge of intercepting outgoing network calls in order to return custom objects. You register new Router objects by using the `register` class methods.
  
- After that, the router can be used to register different HTTP methods (GET, POST, DEL, PUT) with custom `RouteHandlers`
+ After that, the router can be used to register different HTTP methods (GET, POST, PATCH, DEL, PUT) with custom `RouteHandlers`
  */
 public final class Router {
 
@@ -118,6 +118,7 @@ public final class Router {
         case post = "POST"
         case put = "PUT"
         case delete = "DELETE"
+        case patch = "PATCH"
     }
 
     private var routes: [Route : RouteHandler] = [:]
@@ -283,10 +284,32 @@ public final class Router {
     public func post(_ path: String, handler: @escaping RouteHandler) {
         addRoute(with: path, method: .post, handler: handler)
     }
+
+    /**
+    Registers a PATCH request with the given path
+
+    The path is used together with the `Router.baseURL` to match requests. It can contain wildcard components prefixed by ":" that are later used to retrieve the components of the request:
+
+    - "/users/:userid" and "/users/1234" will produce [userid: 1234]
+
+    Other than wildcards the components must be matched by the request.
+    The path should not contain paths that are already contained in the baseURL:
+
+    - base: "http://kakapo.com/api" -> path "/users/1234" ✅
+    - base: "http://kakapo.com/api" -> path "api/users/1234" ❌
+
+    Trailing and leading slashes are not important for the route matching.
+
+    - parameter path: The path used to match URL requests.
+    - parameter handler: A `RouteHandler` handler that will be used when the route is matched for a GET request
+    */
+    public func patch(_ path: String, handler: @escaping RouteHandler) {
+        addRoute(with: path, method: .patch, handler: handler)
+    }
 
     /**
      Registers a DEL request with the given path
-     
+
      The path is used together with the `Router.baseURL` to match requests. It can contain wildcard components prefixed by ":" that are later used to retrieve the components of the request:
      
      - "/users/:userid" and "/users/1234" will produce [userid: 1234]

Tests/RouterTests.swift

@@ -215,6 +215,7 @@ class RouterTests: QuickSpec {
                 var calledPost = false
                 var calledPut = false
                 var calledDel = false
+                var calledPatch = false
 
                 router.post("/users/:user_id") { (request) -> Serializable? in
                     calledPost = true
@@ -230,7 +231,12 @@ class RouterTests: QuickSpec {
                     calledDel = true
                     return nil
                 }
-
+
+                router.patch("/users/:user_id") { (request) -> Serializable? in
+                    calledPatch = true
+                    return nil
+                }
+
                 var request = URLRequest(url: URL(string: "http://www.test.com/users/1")!)
                 request.httpMethod = "POST"
                 URLSession.shared.dataTask(with: request) { (_, _, _) in }.resume()
@@ -248,8 +254,14 @@ class RouterTests: QuickSpec {
                 URLSession.shared.dataTask(with: request) { (_, _, _) in }.resume()
 
                 expect(calledDel).toEventually(beTrue())
+
+                request = URLRequest(url: URL(string: "http://www.test.com/users/1")!)
+                request.httpMethod = "PATCH"
+                URLSession.shared.dataTask(with: request) { (_, _, _) in }.resume()
+
+                expect(calledPatch).toEventually(beTrue())
             }
-            
+
             it("should replace handlers with same path and http methods") {
                 var calledFirstPost = false
                 var calledSecondPost = false