diff options
Diffstat (limited to 'lib/dialyzer/test/small_tests_SUITE_data/src/port_info_test.erl')
| -rw-r--r-- | lib/dialyzer/test/small_tests_SUITE_data/src/port_info_test.erl | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/dialyzer/test/small_tests_SUITE_data/src/port_info_test.erl b/lib/dialyzer/test/small_tests_SUITE_data/src/port_info_test.erl new file mode 100644 index 0000000000..d8a5e15caf --- /dev/null +++ b/lib/dialyzer/test/small_tests_SUITE_data/src/port_info_test.erl @@ -0,0 +1,34 @@ +%% +%% Tests hardcoded dependent type info +%% and the quality of the warnings that Dialyzer spits out +%% +-module(port_info_test). +-export([t1/1, t2/1, t3/1, t4/1, t5/2, buggy/1]). + +%% The following errors are correctly caught, but the messages are a bit weird +t1(X) when is_port(X) -> + {connected, 42} = erlang:port_info(X, connected); +t1(_) -> ok. + +t2(X) when is_port(X) -> + {registered_name, "42"} = erlang:port_info(X, registered_name); +t2(_) -> ok. + +%% Here only one od the two errors is reported... +t3(X) when is_atom(X) -> + {output, 42} = erlang:port_info(X, connected); +t3(_) -> ok. + +t4(X) when is_atom(X) -> + {Atom, _} = erlang:port_info(X, connected), + Atom = links; +t4(_) -> ok. + +t5(X, Atom) when is_port(X) -> + {gazonk, _} = erlang:port_info(X, Atom); +t5(_, _) -> ok. + +%% The type system is not strong enough to catch the following errors +buggy(X) when is_atom(X) -> + {links, X} = erlang:port_info(foo, X). + |