Add small/guard_warnings

1 files changed, 118 insertions, 0 deletions

diff --git a/lib/dialyzer/test/small_SUITE_data/src/guard_warnings.erl b/lib/dialyzer/test/small_SUITE_data/src/guard_warnings.erl
new file mode 100644
index 0000000000..6ab13eef9a
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/guard_warnings.erl
@@ -0,0 +1,118 @@
+%%
+%% A couple of tests for booleans in guards.
+%% Tests with suffix w have incomplete results due to weak dataflow.
+%% Tests with suffix ww have incomplete results due to weak dialyzer.
+%% Tests with suffix x should not give warnings.
+%%
+
+-module(and_bug).
+
+-compile(export_all).
+
+test1(X) when X and not X -> never.
+
+test2(X) when not X and X -> never.
+
+test3(X) when (X and not X) =:= true -> never.
+
+test4(X) when (not X and X) =:= true -> never.
+
+test5(X) when (X and not X) == true -> never.
+
+test6(X) when (not X and X) == true -> never.
+
+test7_w(X) when not (X or not X) -> never.
+
+test8_w(X) when not (not X or X) -> never.
+
+test9(X) when (X or not X) =:= false -> never.
+
+test10(X) when (not X or X) =:= false -> never.
+
+test11(X) when (X or not X) == false -> never.
+
+test12(X) when (not X or X) == false -> never.
+
+test13(X) when X and false -> never.
+
+test14(X) when false and X -> never.
+
+test15(X) when (X and false) =:= true -> never.
+
+test16(X) when (false and X) =:= true -> never.
+
+test17(X) when (X and false) == true -> never.
+
+test18(X) when (false and X) == true -> never.
+
+test19(X) when not (true or X) -> never.
+
+test20(X) when not (X or true) -> never.
+
+test21(X) when (true or X) =:= false -> never.
+
+test22(X) when (X or true) =:= false -> never.
+
+test23(X) when (true or X) == false -> never.
+
+test24(X) when (X or true) == false -> never.
+
+test25(X) when (false and X) -> never.
+
+test26(X) when (X and false) -> never.
+
+test27(X) when (false and X) =:= true -> never.
+
+test28(X) when (X and false) =:= true -> never.
+
+test29(X) when (false and X) == true -> never.
+
+test30(X) when (X and false) == true -> never.
+
+test31() when false and false -> never.
+
+test32() when (false and false) =:= true -> never.
+
+test33() when not (true and true) =:= true -> never.
+
+test34() when (false and false) == true -> never.
+
+test35() when not (true and true) == true -> never.
+
+test36() when false or false -> never.
+
+test37() when (false or false) =:= true -> never.
+
+test38() when not (false or false) =:= false -> never.
+
+test39() when (false or false) == true -> never.
+
+test40() when not (false or false) == false -> never.
+
+test41() when true =:= false -> never.
+
+test42() when true == false -> never.
+
+test43() when not (true =:= true) -> never.
+
+test44() when not (true == true) -> never.
+
+test45() when not (not (not (not (not (not (not true)))))) -> never.
+
+test46(X) when (X =:= true) and (X =:= false) -> never.
+
+test47(X) when (X == true) and (X == false) -> never.
+
+test48(X) when is_boolean(X) and (X =:= true) and (X =/= true) -> never.
+
+test49_x(X) when not (X or X) -> maybe.
+
+test50_x(X) when not (X and X) -> maybe.
+
+test51_x(X) when not (not X) -> maybe.
+
+test52_w(X) when is_boolean(X) and (X =/= true) and (X =:= true) -> never.
+
+test53_ww(X) when is_boolean(X) and (X =/= true) and (X =/= false) -> never.
+
+test54_w(X) when is_boolean(X) and not ((X =:= true) or (X =:= false)) -> never.