Add test for floating-point output to float_SUITE.

This catches endianness problems, such as recently reported for ARMs.

1 files changed, 7 insertions, 2 deletions

diff --git a/erts/emulator/test/float_SUITE.erl b/erts/emulator/test/float_SUITE.erl
index 8e6923ce9f..abe01bf5ec 100644
--- a/erts/emulator/test/float_SUITE.erl
+++ b/erts/emulator/test/float_SUITE.erl
@@ -25,7 +25,7 @@
 	 init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,end_per_testcase/2,
 	 fpe/1,fp_drv/1,fp_drv_thread/1,denormalized/1,match/1,
-	 bad_float_unpack/1,cmp_zero/1, cmp_integer/1, cmp_bignum/1]).
+	 bad_float_unpack/1, write/1, cmp_zero/1, cmp_integer/1, cmp_bignum/1]).
 -export([otp_7178/1]).
 -export([hidden_inf/1]).
 
@@ -42,7 +42,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     [fpe, fp_drv, fp_drv_thread, otp_7178, denormalized,
-     match, bad_float_unpack, {group, comparison}
+     match, bad_float_unpack, write, {group, comparison}
      ,hidden_inf
     ].
 
@@ -190,6 +190,11 @@ bad_float_unpack(Config) when is_list(Config) ->
 bad_float_unpack_match(<<F:64/float>>) -> F;
 bad_float_unpack_match(<<I:64/integer-signed>>) -> I.
 
+%% Exposes endianness issues.
+
+write(Config) when is_list(Config) ->
+    "1.0" = io_lib:write(1.0).
+
 cmp_zero(_Config) ->
     cmp(0.5e-323,0).