如何使用钢筋来创建一个具有eunit测试的erlang模块? [英] how to use rebar to create an erlang module with an eunit test?

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本文介绍了如何使用钢筋来创建一个具有eunit测试的erlang模块?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我的目标很简单;我正在学习Erlang,我想使用钢筋来创建一个基本的模块,通过eunit测试:



我已经尝试了以下内容:

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

编辑'test / erlangscratch_tests.erl'看起来像这样:

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

%这应该失败
basic_test_() - >
?assert(1 =:= 2)。

执行测试:

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

测试没有执行,但似乎代码不是



以下是我的文件夹的内容:

  snowch @tp:〜/ erlangscratch $ tree。 

├──src
│└──erlangscratch.erl
└──测试
└──erlangscratch_tests.erl

2个目录,2个文件

问题:我错过了哪些步骤? p>




更新:



接受的答案 basic_test _ 函数需要重命名,并且src / erlangscratch.app.src丢失,因此我创建了以下内容:

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


解决方案

您正在将测试与测试生成器



简而言之,第二个应该返回乐趣或乐趣的列表。您可以在测试名称末尾和 _ 和宏的开头区分 _



简单的解决方案将使用

  basic_test() - > 
?assert(1 =:= 2)。

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

根据您的需要,您了解的更好。





$ b

EDIT 共享文件夹结构



似乎钢筋不认识你作为 OTP应用程序的项目。你可能只是简单的 .app.src 文件。例如:

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

由于钢筋能够为您生成一个,您只需调用钢筋创建应用程序或扩展现有模板之一。


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, []}
 ]}.

解决方案

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.

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