gnu: ghc-microlens-aeson: Patch tests for i686-linux.

* gnu/packages/patches/ghc-microlens-aeson-fix-tests.patch: New file.
* gnu/local.mk: Add it.
* gnu/packages/haskell-xyz.scm (ghc-microlens-aeson): Use it.

gnu/local.mk

@@ -881,6 +881,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/ghc-diff-swap-cover-args.patch           \
   %D%/packages/patches/ghc-dont-pass-linker-flags-via-response-files.patch	\
   %D%/packages/patches/ghc-hpack-fix-tests.patch		\
+  %D%/packages/patches/ghc-microlens-aeson-fix-tests.patch	\
   %D%/packages/patches/ghc-monad-par-fix-tests.patch		\
   %D%/packages/patches/ghc-pandoc-fix-html-tests.patch		\
   %D%/packages/patches/ghc-pandoc-fix-latex-test.patch		\

gnu/packages/haskell-xyz.scm

@@ -6591,6 +6591,7 @@ (define-public ghc-microlens-aeson
        (uri (string-append "https://hackage.haskell.org/package/"
                            "microlens-aeson/microlens-aeson-"
                            version ".tar.gz"))
+       (patches (search-patches "ghc-microlens-aeson-fix-tests.patch"))
        (sha256
         (base32
          "0w630kk5bnily1qh41081gqgbwmslrh5ad21899gwnb2r3jripyw"))))

gnu/packages/patches/ghc-microlens-aeson-fix-tests.patch

@@ -0,0 +1,27 @@
+This patch fixes the test suite to allow any order when listing the
+members of a JSON object.  Aeson (being true to the JSON specification)
+does not specify an order for objects.  In practice, the order depends
+on your processor architecture.
+
+See <https://github.com/bos/aeson/issues/568> for a discussion resulting
+in a similar patch fixing the Aeson tests.
+
+See <https://github.com/fosskers/microlens-aeson/issues/1> for the
+upstream bug report.
+
+diff -ruN a/test/Test.hs b/test/Test.hs
+--- a/test/Test.hs	2018-12-31 15:10:50.000000000 -0500
++++ b/test/Test.hs	2019-11-08 01:34:07.419706831 -0500
+@@ -48,8 +48,10 @@
+     , testCase "" $ ("{\"a\": {}, \"b\": null}" ^? key (T.pack "b") . _Object) @?= Nothing
+     , testCase "" $ ("{\"a\": 100, \"b\": 200}" ^? key (T.pack "a")) @?= Just (Number 100.0)
+     , testCase "" $ ("[1,2,3]" ^? key (T.pack "a")) @?= Nothing
+-    , testCase "" $ ("{\"a\": 4, \"b\": 7}" ^.. members) @?= [Number 4.0,Number 7.0]
+-    , testCase "" $ ("{\"a\": 4, \"b\": 7}" & members . _Number %~ (* 10)) @?= "{\"a\":40,\"b\":70}"
++    , testCase "" $ assertBool "" (let x = ("{\"a\": 4, \"b\": 7}" ^.. members)
++                                   in x == [Number 4.0,Number 7.0] || x == [Number 7.0,Number 4.0])
++    , testCase "" $ assertBool "" (let x = ("{\"a\": 4, \"b\": 7}" & members . _Number %~ (* 10))
++                                   in x == "{\"a\":40,\"b\":70}" || x == "{\"b\":70,\"a\":40}")
+     , testCase "" $ ("[1,2,3]" ^? nth 1) @?= Just (Number 2.0)
+     , testCase "" $ ("{\"a\": 100, \"b\": 200}" ^? nth 1) @?= Nothing
+     , testCase "" $ ("[1,2,3]" & nth 1 .~ Number 20) @?= "[1,20,3]"