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authorBjörn Gustavsson <[email protected]>2017-06-12 10:47:49 +0200
committerBjörn Gustavsson <[email protected]>2017-06-12 10:50:12 +0200
commit808c828c30cbb0fb57847675cc579d989c687710 (patch)
tree60ae39f474975a918f4c45ed8242b1ce856625bd
parentc1d2968701ef330bb38771185a86e8ec3676c091 (diff)
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beam_type_SUITE: Add a test case for an already fixed bug
https://bugs.erlang.org/browse/ERL-433
-rw-r--r--lib/compiler/test/beam_type_SUITE.erl25
1 files changed, 23 insertions, 2 deletions
diff --git a/lib/compiler/test/beam_type_SUITE.erl b/lib/compiler/test/beam_type_SUITE.erl
index 07dad85c57..86146c614f 100644
--- a/lib/compiler/test/beam_type_SUITE.erl
+++ b/lib/compiler/test/beam_type_SUITE.erl
@@ -22,7 +22,7 @@
-export([all/0,suite/0,groups/0,init_per_suite/1,end_per_suite/1,
init_per_group/2,end_per_group/2,
integers/1,coverage/1,booleans/1,setelement/1,cons/1,
- tuple/1,record_float/1,binary_float/1]).
+ tuple/1,record_float/1,binary_float/1,float_compare/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
@@ -39,7 +39,8 @@ groups() ->
cons,
tuple,
record_float,
- binary_float
+ binary_float,
+ float_compare
]}].
init_per_suite(Config) ->
@@ -151,5 +152,25 @@ binary_float(_Config) ->
binary_negate_float(<<Float/float>>) ->
<<-Float/float>>.
+float_compare(_Config) ->
+ false = do_float_compare(-42.0),
+ false = do_float_compare(-42),
+ false = do_float_compare(0),
+ false = do_float_compare(0.0),
+ true = do_float_compare(42),
+ true = do_float_compare(42.0),
+ ok.
+
+do_float_compare(X) ->
+ %% ERL-433: Used to fail before OTP 20. Was accidentally fixed
+ %% in OTP 20. Add a test case to ensure it stays fixed.
+
+ Y = X + 1.0,
+ case X > 0 of
+ T when (T =:= nil) or (T =:= false) -> T;
+ _T -> Y > 0
+ end.
+
+
id(I) ->
I.