how to use rebar to create an erlang module with an eunit test?

Question

My goal is quite simple; while I am learning Erlang, I would like to use rebar to create a basic module with an eunit test:

I have tried the following:

mkdir erlangscratch
cd erlangscratch
rebar create template=simplemod modid=erlangscratch

Edit the 'test/erlangscratch_tests.erl' to look like this:

-module(erlangscratch_tests).
-include_lib("eunit/include/eunit.hrl").

% This should fail
basic_test_() ->
    ?assert(1 =:= 2).

Execute the tests:

snowch@tp:~/erlangscratch$ rebar co eu
==> erlangscratch (compile)
==> erlangscratch (eunit)

The tests weren't executed, but it also seems that the code isn't compiling.

Here are the contents of my folder:

snowch@tp:~/erlangscratch$ tree .
.
├── src
│   └── erlangscratch.erl
└── test
    └── erlangscratch_tests.erl

2 directories, 2 files

Question: What step(s) have I missed out?

---

UPDATE:

As per the accepted answer, basic_test_ function needed to be renamed and the 'src/erlangscratch.app.src' was missing so I created it with the following contents:

{application, erlangscratch,
 [
  {description, "An Erlang erlangscratch library"},
  {vsn, "1"},
  {modules, [
             erlangscratch
            ]},
  {registered, []},
  {applications, [
                  kernel,
                  stdlib
                 ]},
  {env, []}
 ]}.

Answer 1

You are mixing tests with test generators.

In short the second one should return fun's or lists of fun's. You can distinguish both by _ at the end of your tests names, and _ and the beginning of your macros.

Simple solution would be using either

basic_test() ->
    ?assert(1 =:= 2).

or

basic_test_() ->
    ?_assert(1 =:= 2).

depending on your needs, and what you understand better.

---

EDIT after sharing folder structure

It seems rebar is not recognizing your project as an OTP application. You might be just missing simple .app.src file. Something like:

{application, myapp,
 [
  {description, ""},
  {vsn, "1"},
  {registered, []},
  {applications, [
                  kernel,
                  stdlib
                 ]},
  {env, []}
 ]}.

And since rebar is capable of generating one for you, you either just call rebar create-app or extend one of existing templates.