From 1107083935fbdb8f8a7ece9549d8203652c4fec6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Fri, 17 Nov 2017 14:20:05 +0100
Subject: Avoid using the efile driver in test suites

The efile driver will soon be reimplemented as a BIF.

Instead of opening a port based on efile, use hd(erlang:ports()).  It
is a reasonable safe assumption that the runtime will continue to use
use at least some ports.
---
 erts/emulator/test/binary_SUITE.erl       | 2 +-
 erts/emulator/test/distribution_SUITE.erl | 5 ++++-
 erts/emulator/test/guard_SUITE.erl        | 5 ++++-
 3 files changed, 9 insertions(+), 3 deletions(-)

(limited to 'erts')

diff --git a/erts/emulator/test/binary_SUITE.erl b/erts/emulator/test/binary_SUITE.erl
index b59c22f125..c71267a6d1 100644
--- a/erts/emulator/test/binary_SUITE.erl
+++ b/erts/emulator/test/binary_SUITE.erl
@@ -1202,7 +1202,7 @@ very_big_num(0, Result) ->
     Result.
 
 make_port() ->
-    open_port({spawn, efile}, [eof]).
+    hd(erlang:ports()).
 
 make_pid() ->
     spawn_link(?MODULE, sleeper, []).
diff --git a/erts/emulator/test/distribution_SUITE.erl b/erts/emulator/test/distribution_SUITE.erl
index f1831b7c45..e40d346e10 100644
--- a/erts/emulator/test/distribution_SUITE.erl
+++ b/erts/emulator/test/distribution_SUITE.erl
@@ -742,7 +742,7 @@ link_to_dead_new_node(Config) when is_list(Config) ->
 %% doesn't correct them in any way.
 ref_port_roundtrip(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
-    Port = open_port({spawn, efile}, []),
+    Port = make_port(),
     Ref = make_ref(),
     {ok, Node} = start_node(ref_port_roundtrip),
     net_adm:ping(Node),
@@ -763,6 +763,9 @@ ref_port_roundtrip(Config) when is_list(Config) ->
     end,
     ok.
 
+make_port() ->
+    hd(erlang:ports()).
+
 roundtrip(Term) ->
     exit(Term).
 
diff --git a/erts/emulator/test/guard_SUITE.erl b/erts/emulator/test/guard_SUITE.erl
index 1a93a9f5c2..f2c1595392 100644
--- a/erts/emulator/test/guard_SUITE.erl
+++ b/erts/emulator/test/guard_SUITE.erl
@@ -500,7 +500,7 @@ all_types() ->
      {atom, xxxx},
      {ref, make_ref()},
      {pid, self()},
-     {port, open_port({spawn, efile}, [])},
+     {port, make_port()},
      {function, fun(_) -> "" end},
      {function, fun erlang:abs/1},
      {binary, list_to_binary([])},
@@ -551,4 +551,7 @@ type_test(bitstring, X) when is_bitstring(X) ->
 type_test(function, X) when is_function(X) ->
     function.
 
+make_port() ->
+    hd(erlang:ports()).
+
 id(I) -> I.
-- 
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