Add pendingOnMacOS helper

lib/test-utils/cardano-wallet-test-utils.cabal

@@ -57,6 +57,7 @@ library
   exposed-modules:
       Test.Hspec.Extra
       Test.QuickCheck.Extra
+      Test.Utils.Darwin
       Test.Utils.FilePath
       Test.Utils.Laws
       Test.Utils.Laws.PartialOrd

lib/test-utils/src/Test/Utils/Darwin.hs

@@ -0,0 +1,27 @@
+-- |
+-- Copyright: © 2018-2021 IOHK
+-- License: Apache-2.0
+--
+-- Utility function for making test suites pass on Darwin/macOS.
+
+module Test.Utils.Darwin
+    ( pendingOnMacOS
+    ) where
+
+import Prelude
+
+import Control.Monad
+    ( when )
+import System.Info
+    ( os )
+import Test.Hspec.Core.Spec
+    ( pendingWith )
+import Test.Hspec.Expectations
+    ( Expectation, HasCallStack )
+
+-- | Mark test pending if running on macOS
+pendingOnMacOS :: HasCallStack => String -> Expectation
+pendingOnMacOS reason = when isDarwin $ pendingWith reason
+
+isDarwin :: Bool
+isDarwin = os == "darwin"