Move tests from EUnit to Common Test

Notice the use of README.md from the linked `priv` folder

Files were mostly renamed and then:
- added init/end_per_suite (from setup/teardown)
- added init/end_per_testcase (from elli_test_)
- removed _test suffix from exported function names
- moved rebar.config test options to test profile
- added a shareable (example + tests) symbolic link, used as
  filename:join(code:priv_dir(elli), "README.md") for
  single reference...

priv/README.md

@@ -0,0 +1 @@
+../README.md

rebar.config

@@ -16,7 +16,20 @@
     ]}
   ]},
   {test, [
-    {deps,      [{hackney, "1.17.4"}]}
+    {deps,      [{hackney, "1.17.4"}]},
+    {extra_src_dirs, [
+        {"test", [
+            {recursive, true}
+        ]}
+    ]},
+    {cover_enabled, true},
+    {cover_export_enabled, true},
+    {cover_excl_mods, [
+      elli_handler
+    ]},
+    {covertool, [{coverdata_files, ["ct.coverdata"]}]},
+    {cover_opts, [verbose]},
+    {ct_opts, [{ct_hooks, [cth_surefire]}]}
   ]}
 ]}.
 
@@ -30,13 +43,4 @@
 %{provider_hooks, [{pre, [{eunit, lint}]}]}.
 {dialyzer, [{plt_extra_apps, [ssl]}]}.
 
-{cover_enabled, true}.
-{cover_export_enabled, true}.
-{cover_excl_mods, [
-  elli_handler
-]}.
-{covertool, [{coverdata_files, ["ct.coverdata"]}]}.
-
 {post_hooks, [{edoc, "doc/build.sh"}]}.
-
-{ct_opts, [{ct_hooks, [cth_surefire]}]}.

src/elli_example_callback.erl

@@ -135,7 +135,7 @@ handle('GET', [<<"decoded-list">>], Req) ->
 handle('GET', [<<"sendfile">>], _Req) ->
     %% Returning {file, "/path/to/file"} instead of the body results
     %% in Elli using sendfile.
-    F    = "README.md",
+    F    = filename:join(code:priv_dir(elli), "README.md"),
     {ok, [], {file, F}};
 
 handle('GET', [<<"send_no_file">>], _Req) ->
@@ -145,14 +145,14 @@ handle('GET', [<<"send_no_file">>], _Req) ->
     {ok, [], {file, F}};
 
 handle('GET', [<<"sendfile">>, <<"error">>], _Req) ->
-    F    = "test",
+    F    = code:priv_dir(elli),
     {ok, [], {file, F}};
 
 handle('GET', [<<"sendfile">>, <<"range">>], Req) ->
     %% Read the Range header of the request and use the normalized
     %% range with sendfile, otherwise send the entire file when
     %% no range is present, or respond with a 416 if the range is invalid.
-    F     = "README.md",
+    F     = filename:join(code:priv_dir(elli), "README.md"),
     {ok, [], {file, F, elli_request:get_range(Req)}};
 
 handle('GET', [<<"compressed">>], _Req) ->

src/elli_http.erl

@@ -27,6 +27,10 @@
 
 -export_type([version/0]).
 
+-ifdef(TEST).
+-export([get_body/5]).
+-endif.
+
 %% @type version(). HTTP version as a tuple, i.e. `{0, 9} | {1, 0} | {1, 1}'.
 -type version() :: {0, 9} | {1, 0} | {1, 1}.
 
@@ -893,21 +897,3 @@ status(510) -> <<"510 Not Extended">>;
 status(511) -> <<"511 Network Authentication Required">>;
 status(I) when is_integer(I), I >= 100, I < 1000 -> list_to_binary(io_lib:format("~B Status", [I]));
 status(B) when is_binary(B) -> B.
-
-
-%%
-%% UNIT TESTS
-%%
-
--ifdef(TEST).
--include_lib("eunit/include/eunit.hrl").
-
-get_body_test() ->
-    Socket   = undefined,
-    Headers  = [{<<"Content-Length">>, <<" 42 ">>}],
-    Buffer   = binary:copy(<<".">>, 42),
-    Opts     = [],
-    Callback = {no_mod, []},
-    ?assertMatch({Buffer, <<>>},
-                 get_body(Socket, Headers, Buffer, Opts, Callback)).
--endif.

src/elli_test.erl

@@ -25,23 +25,3 @@ call(Method, Path, Headers, Body, Opts) ->
                            Body, {1, 1}, undefined, {Callback, CallbackArgs}),
     ok  = Callback:handle_event(elli_startup, [], CallbackArgs),
     Callback:handle(Req, CallbackArgs).
-
--ifdef(TEST).
--include_lib("eunit/include/eunit.hrl").
-
-hello_world_test() ->
-    ?assertMatch({ok, [], <<"Hello World!">>},
-                 elli_test:call('GET', <<"/hello/world/">>, [], <<>>,
-                                ?EXAMPLE_CONF)),
-    ?assertMatch({ok, [], <<"Hello Test1">>},
-                 elli_test:call('GET', <<"/hello/?name=Test1">>, [], <<>>,
-                                ?EXAMPLE_CONF)),
-    ?assertMatch({ok,
-                  [{<<"content-type">>,
-                    <<"application/json; charset=ISO-8859-1">>}],
-                  <<"{\"name\" : \"Test2\"}">>},
-                 elli_test:call('GET', <<"/type?name=Test2">>,
-                                [{<<"accept">>, <<"application/json">>}], <<>>,
-                                ?EXAMPLE_CONF)).
-
--endif. %% TEST