file_SUITE: Only test allocate/3 size updates on known ok platforms

Support is spotty in our test platform, especially on the rigs that
run the tests on funny file systems like NFS. We therefore limit
the test to the rigs where we know it will work under normal
circumstances.

That the call works at all is tested in allocate/1, this commit
only skips the size assertion test.

1 files changed, 8 insertions, 8 deletions

diff --git a/lib/kernel/test/file_SUITE.erl b/lib/kernel/test/file_SUITE.erl
index 7686aeee7d..1c1b35abc1 100644
--- a/lib/kernel/test/file_SUITE.erl
+++ b/lib/kernel/test/file_SUITE.erl
@@ -2041,13 +2041,7 @@ allocate_and_assert(Fd, Offset, Length) ->
 %% Tests that asserts that file:allocate/3 changes file size
 allocate_file_size(Config) when is_list(Config) ->
     case os:type() of
-        {win32, _} ->
-            {skip, "Windows does not support file:allocate/3"};
-
-        {unix, linux} ->
-            {skip, "file:allocate/3 on Linux does not change file size"};
-
-        _ ->
+        {unix, darwin} ->
             PrivDir = proplists:get_value(priv_dir, Config),
             Allocate = filename:join(PrivDir, atom_to_list(?MODULE)++"_allocate_file"),
 
@@ -2057,7 +2051,13 @@ allocate_file_size(Config) when is_list(Config) ->
             ok = ?FILE_MODULE:close(Fd),
 
             [] = flush(),
-            ok
+            ok;
+        {unix, linux} ->
+            {skip, "file:allocate/3 on Linux does not change file size"};
+        {win32, _} ->
+            {skip, "Windows does not support file:allocate/3"};
+        _ ->
+            {skip, "Support for allocate/3 is spotty in our test platform at the moment."}
     end.
 
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