标签：des style blog class code java
怎样写一个基本的Eunit? Doc.
1. 加入头文件：声明此模块以”_test”结尾的函数都是测试用，并在编译时自动在这个模块里加入test()函数（当然这个可以用宏来控制）
-include_lib("eunit/include/eunit.hrl").
2.编写测试用例：”*_test()”函数":
reverse_nil_test() -> [] = lists:reverse([]). reverse_one_test() -> [1] = lists:reverse([1]). reverse_two_test() -> [2,1] = lists:reverse([1,2]). %%也可以用宏:这个有好几种，很方便，要用就看文档，比不用宏的优势在于出错信息详细 length_test() -> ?assert(length([1,2,3]) =:= 3).
3. 运行 Eunit
编译Module –> 然后：
Module:test(). %%或 eunit:test(Module).
以上是一个最简单的Eunit的例子，那么：
Question: 类似gen_server有启动进程类的Eunit怎么写？有并发的怎么写？
基本Code形式：
-ifdef(TEST). -include_lib("eunit/include/eunit.hrl"). -compile({no_auto_import, [get/1, put/2]}). basic_test_() -> {setup, fun() -> ?debugFmt("Starting ~p", [?MODULE]), case start_link() of {error, {already_started, _}} -> ok; {ok, _} -> do_stop end end, fun(Stop) -> case Stop of do_stop -> stop(); ok -> ok end end, [ {timeout, 60, fun normal_insert/0}, {timeout, 60, fun ttl_insert/0} ] }. noraml_insert() -> todo. ttl_insert() -> todo.
-endif.
%%To make the descriptions simpler, we first list some definitions: Setup () -> (R::any()) SetupX (X::any()) -> (R::any()) Cleanup (R::any()) -> any() CleanupX (X::any(), R::any()) -> any() Instantiator ((R::any()) -> Tests) | {with, [AbstractTestFun::((any()) -> any())]} Where local | spawn | {spawn, Node::atom()} Table .1: (these are explained in more detail further below.) %%The following representations specify fixture handling for test sets: {setup, Setup, Tests | Instantiator} {setup, Setup, Cleanup, Tests | Instantiator} {setup, Where, Setup, Tests | Instantiator} {setup, Where, Setup, Cleanup, Tests | Instantiator}
Setup () -> (R::any()) SetupX (X::any()) -> (R::any()) Cleanup (R::any()) -> any() CleanupX (X::any(), R::any()) -> any() Instantiator ((R::any()) -> Tests) | {with, [AbstractTestFun::((any()) -> any())]} Where local | spawn | {spawn, Node::atom()}
我们上面就是用的: {setup,Setup,Cleanup,TestList}这种，所以用Setup启动，运行TestList后用启动Setup的返回值传入Cleanup(Val)结束！
Tip: 如果你想用新起进程来测试一个模块【gen_server是不需要这样子的，本来就是新起了个进程】可以参照Where参数。
通过以上，我们就可以写出很漂亮的gen_server的enuit函数啦！！
那么如何让多个enuit并行跑呢？比如不相关的几个gen_server并行跑起来！
用参数：inparallel
base_test_() -> {setup, spawn, fun() -> start() end, fun(_) -> stop() end, {inparallel, 3,[ {timeout, 60, funnormal_insert/0}, {timeout, 60, ttl_insert/0} ]} }.
惊喜:可以指定同时跑几个哦,上面指定了3个,不指定也可以的.
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一个好的application一定要有可靠的测试用例！，但是如果你在程序里面大量用有副作用的进程字典，还是很难写enuit的…
[Erl_Question05]gen_server怎么去写eunit?,布布扣,bubuko.com
[Erl_Question05]gen_server怎么去写eunit?
标签：des style blog class code java
原文地址：http://www.cnblogs.com/zhongwencool/p/3729046.html
