test for eunit provider

test/rebar_eunit_SUITE.erl

@@ -0,0 +1,37 @@
+-module(rebar_eunit_SUITE).
+
+-export([suite/0,
+         init_per_suite/1,
+         end_per_suite/1,
+         init_per_testcase/2,
+         all/0,
+         test_basic_app/1]).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("eunit/include/eunit.hrl").
+-include_lib("kernel/include/file.hrl").
+
+suite() ->
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_testcase(_, Config) ->
+    rebar_test_utils:init_rebar_state(Config).
+
+all() ->
+    [test_basic_app].
+
+test_basic_app(Config) ->
+    AppDir = ?config(apps, Config),
+
+    Name = rebar_test_utils:create_random_name("eunit_"),
+    Vsn = rebar_test_utils:create_random_vsn(),
+    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    
+    RebarConfig = [{erl_opts, [{d, some_define}]}],
+    rebar_test_utils:run_and_check(Config, RebarConfig, ["eunit"], {ok, [{app, Name}]}).

test/rebar_test_utils.erl

@@ -62,6 +62,7 @@ run_and_check(Config, RebarConfig, Command, Expect) ->
 %% And returns a `rebar_app_info' object.
 create_app(AppDir, Name, Vsn, Deps) ->
     write_src_file(AppDir, Name),
+    write_test_file(AppDir, Name),
     write_app_src_file(AppDir, Name, Vsn, Deps),
     rebar_app_info:new(Name, Vsn, AppDir, Deps).
 
@@ -133,9 +134,14 @@ check_results(AppDir, Expected) ->
         end, Expected).
 
 write_src_file(Dir, Name) ->
-    Erl = filename:join([Dir, "src", "not_a_real_src" ++ Name ++ ".erl"]),
+    Erl = filename:join([Dir, "src", "not_a_real_src_" ++ Name ++ ".erl"]),
     ok = filelib:ensure_dir(Erl),
-    ok = ec_file:write(Erl, erl_src_file("not_a_real_src" ++ Name ++ ".erl")).
+    ok = ec_file:write(Erl, erl_src_file("not_a_real_src_" ++ Name ++ ".erl")).
+
+write_test_file(Dir, Name) ->
+    Erl = filename:join([Dir, "test", "not_a_real_src_" ++ Name ++ "_tests.erl"]),
+    ok = filelib:ensure_dir(Erl),
+    ok = ec_file:write(Erl, erl_test_file("not_a_real_src_" ++ Name ++ ".erl")).
 
 write_app_file(Dir, Name, Version, Deps) ->
     Filename = filename:join([Dir, "ebin", Name ++ ".app"]),
@@ -149,8 +155,25 @@ write_app_src_file(Dir, Name, Version, Deps) ->
 
 erl_src_file(Name) ->
     io_lib:format("-module(~s).\n"
-                 "-export([main/0]).\n"
-                 "main() -> ok.\n", [filename:basename(Name, ".erl")]).
+                  "-export([main/0]).\n"
+                  "main() -> ok.\n"
+                  "-ifdef(TEST).\n"
+                  "-include_lib(\"eunit/include/eunit.hrl\").\n"
+                  "some_test_() -> ?_assertEqual(ok, main()).\n"
+                  "-endif.\n", [filename:basename(Name, ".erl")]).
+
+erl_test_file(Name) ->
+    BaseName = filename:basename(Name, ".erl"),
+    io_lib:format("-module(~s_tests).\n"
+                  "-compile(export_all).\n"
+                  "-ifndef(some_define).\n"
+                  "-define(some_define, false).\n"
+                  "-endif.\n"
+                  "-ifdef(TEST).\n"
+                  "-include_lib(\"eunit/include/eunit.hrl\").\n"
+                  "some_test_() -> ?_assertEqual(ok, ~s:main()).\n"
+                  "define_test_() -> ?_assertEqual(true, ?some_define).\n"
+                  "-endif.\n", [BaseName, BaseName]).
 
 get_app_metadata(Name, Vsn, Deps) ->
     {application, erlang:list_to_atom(Name),