Dactyloidae iOS initial commit

mobile/ios/DeferredTestUtils.swift

@@ -0,0 +1,25 @@
+/* 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 Shared
+import Deferred
+import XCTest
+
+protocol Succeedable {
+    var isSuccess: Bool { get }
+    var isFailure: Bool { get }
+}
+
+extension Maybe: Succeedable {}
+
+extension Deferred where T: Succeedable {
+    func succeeded() {
+        XCTAssertTrue(self.value.isSuccess)
+    }
+
+    func failed() {
+        XCTAssertTrue(self.value.isFailure)
+    }
+}
+