Dactyloidae iOS initial commit

mobile/ios/ClientTests/XCTestCaseExtensions.swift

@@ -0,0 +1,30 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import Foundation
+import XCTest
+
+extension XCTestCase {
+    func wait(_ time: TimeInterval) {
+        let expectation = self.expectation(description: "Wait")
+        let delayTime = DispatchTime.now() + Double(Int64(time * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)
+        DispatchQueue.main.asyncAfter(deadline: delayTime) {
+            expectation.fulfill()
+        }
+        waitForExpectations(timeout: time + 1, handler: nil)
+    }
+
+    func waitForCondition(timeout: TimeInterval = 10, condition: () -> Bool) {
+        let timeoutTime = Date.timeIntervalSinceReferenceDate + timeout
+
+        while !condition() {
+            if Date.timeIntervalSinceReferenceDate > timeoutTime {
+                XCTFail("Condition timed out")
+                return
+            }
+
+            wait(0.1)
+        }
+    }
+}