Move validation logic to a new class and add tests

RiotTests/URLValidatorTests.swift

@@ -0,0 +1,97 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// Licensed 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
+@testable import Riot
+
+class URLValidatorTests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testWithOnlyURLEvent() {
+        guard let event = MXEvent(fromJSON: [
+            "content": [
+                kMXMessageBodyKey: "https://www.example.com"
+            ]
+        ]) else {
+            XCTFail("Failed to setup test conditions")
+            return
+        }
+
+        guard let url = URL(string: "https://www.example.com") else {
+            XCTFail("Failed to setup test conditions")
+            return
+        }
+
+        let result = URLValidator.validateTappedURL(url, in: event)
+
+        XCTAssertFalse(result.shouldShowConfirmationAlert, "Should not show a confirmation alert for given event and url")
+        XCTAssertNil(result.visibleURLString)
+    }
+
+    func testWithHTMLEvent() {
+        guard let event = MXEvent(fromJSON: [
+            "content": [
+                kMXMessageBodyKey: "[link](https://www.example.com)",
+                "format": kMXRoomMessageFormatHTML,
+                "formatted_body": "<a href=\"https://www.example.com\">link</a>"
+            ]
+        ]) else {
+            XCTFail("Failed to setup test conditions")
+            return
+        }
+
+        guard let url = URL(string: "https://www.example.com") else {
+            XCTFail("Failed to setup test conditions")
+            return
+        }
+
+        let result = URLValidator.validateTappedURL(url, in: event)
+
+        XCTAssertTrue(result.shouldShowConfirmationAlert, "Should show a confirmation alert for given event and url")
+        XCTAssertEqual(result.visibleURLString, "link")
+    }
+
+    func testWithRTLOverriddenEvent() {
+        let realLink = "https://www.dangerous.com/=qhcraes#/moc.elgoog.www//:sptth"
+        let visibleLink = realLink.vc_reversed()
+
+        guard let event = MXEvent(fromJSON: [
+            "content": [
+                kMXMessageBodyKey: "\u{202E}" + visibleLink
+            ]
+        ]) else {
+            XCTFail("Failed to setup test conditions")
+            return
+        }
+
+        guard let url = URL(string: realLink) else {
+            XCTFail("Failed to setup test conditions")
+            return
+        }
+
+        let result = URLValidator.validateTappedURL(url, in: event)
+
+        XCTAssertTrue(result.shouldShowConfirmationAlert, "Should show a confirmation alert for given event and url")
+        XCTAssertEqual(result.visibleURLString, visibleLink)
+    }
+}