[esock|test] Add ttest case (ssf/csf/m) work for local (stream)

Add ttest test case for Unix Domain (stream) socket:

    Server:       socket with active = false
    Client:       socket with active = false
    Message Size: medium

OTP-15822

1 files changed, 26 insertions, 0 deletions

diff --git a/erts/emulator/test/socket_SUITE.erl b/erts/emulator/test/socket_SUITE.erl
index fd7581f664..8424f0c97b 100644
--- a/erts/emulator/test/socket_SUITE.erl
+++ b/erts/emulator/test/socket_SUITE.erl
@@ -356,6 +356,7 @@
          ttest_ssockf_csockf_small_tcpL/1,
          ttest_ssockf_csockf_medium_tcp4/1,
          ttest_ssockf_csockf_medium_tcp6/1,
+         ttest_ssockf_csockf_medium_tcpL/1,
          ttest_ssockf_csockf_large_tcp4/1,
          ttest_ssockf_csockf_large_tcp6/1,
 
@@ -1204,6 +1205,7 @@ ttest_ssockf_csockf_cases() ->
 
      ttest_ssockf_csockf_medium_tcp4,
      ttest_ssockf_csockf_medium_tcp6,
+     ttest_ssockf_csockf_medium_tcpL,
 
      ttest_ssockf_csockf_large_tcp4,
      ttest_ssockf_csockf_large_tcp6
@@ -16366,6 +16368,30 @@ ttest_ssockf_csockf_medium_tcp6(Config) when is_list(Config) ->
 %% ping-pong like test case.
 %% Server:       Transport = socket(tcp), Active = false
 %% Client:       Transport = socket(tcp), Active = false
+%% Message Size: medium (=2)
+%% Domain:       local
+%% 
+
+ttest_ssockf_csockf_medium_tcpL(suite) ->
+    [];
+ttest_ssockf_csockf_medium_tcpL(doc) ->
+    [];
+ttest_ssockf_csockf_medium_tcpL(Config) when is_list(Config) ->
+    Runtime = which_ttest_runtime(Config),
+    ttest_tcp(ttest_ssockf_csockf_medium_tcpL,
+              Runtime,
+              local,
+              sock, false,
+              sock, false,
+              2, 20).
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% This test case uses the time test (ttest) utility to implement a 
+%% ping-pong like test case.
+%% Server:       Transport = socket(tcp), Active = false
+%% Client:       Transport = socket(tcp), Active = false
 %% Message Size: large (=3)
 %% Domain:       inet
 %%