avoid assertion when deliberately testing for failure

SignalServiceKit/src/Messages/UD/OWSUDManager.swift

@@ -286,7 +286,9 @@ public class OWSUDManagerImpl: NSObject, OWSUDManager {
                 if isUDVerboseLoggingEnabled() {
                     Logger.info("UD disabled for \(recipientId), no profile key for this recipient.")
                 }
-                owsFailDebug("Couldn't find profile key for UD-enabled user.")
+                if (!CurrentAppContext().isRunningTests) {
+                    owsFailDebug("Couldn't find profile key for UD-enabled user.")
+                }
                 return nil
             }
             if isUDVerboseLoggingEnabled() {

SignalServiceKit/src/Util/SSKAsserts.h

@@ -50,4 +50,19 @@ NS_ASSUME_NONNULL_BEGIN
 
 #endif
 
+#define OWSFailDebugUnlessRunningTests(_messageFormat, ...)                                                            \
+    do {                                                                                                               \
+        if (!CurrentAppContext().isRunningTests) {                                                                     \
+            OWSFailDebug(_messageFormat, ##__VA_ARGS__);                                                               \
+        }                                                                                                              \
+    } while (0)
+
+#define OWSCFailDebugUnlessRunningTests(_messageFormat, ...)                                                           \
+    do {                                                                                                               \
+        if (!CurrentAppContext().isRunningTests) {                                                                     \
+            OWSCFailDebug(_messageFormat, ##__VA_ARGS__);                                                              \
+        }                                                                                                              \
+    } while (NO)
+
+
 NS_ASSUME_NONNULL_END