fix testcase

enzevalos_iphoneTests/AutocryptTest.swift

@@ -123,8 +123,10 @@ class AutocryptTest: XCTestCase {
                     TODO ADD Ecdsa key
                     """
         do {
-            try  pgp.importKeys(key: key, pw: nil, isSecretKey: false, autocrypt: true)
+            let x = try pgp.importKeys(key: key, pw: nil, isSecretKey: false, autocrypt: true)
+            XCTAssertTrue(x.isEmpty, "We can not handle ecdsa keys!")
         } catch {
+            XCTFail("No errors should arise when handling ecdsa keys!")
             print(error)
         }
     }