系统技术非业余研究

rebar是个功能非常强大的Erlang项目管理工具，参看这里 https://github.com/basho/rebar，他的定位是：

rebar is an Erlang build tool that makes it easy to compile and
test Erlang applications, port drivers and releases.

rebar is a self-contained Erlang script, so it’s easy to distribute or even
embed directly in a project. Where possible, rebar uses standard Erlang/OTP
conventions for project structures, thus minimizing the amount of build
configuration work. rebar also provides dependency management, enabling
application writers to easily re-use common libraries from a variety of
locations (git, hg, etc).

common_test是Erlang强大的黑盒测试框架 参见这里

Common Test is a portable application for automated testing. It is suitable for black-box testing of target systems of
any type (i.e. not necessarily implemented in Erlang), as well as for white-box testing of Erlang/OTP programs. Blackbox
testing is performed via standard O&M interfaces (such as SNMP, HTTP, Corba, Telnet, etc) and, if required, via
user specific interfaces (often called test ports). White-box testing of Erlang/OTP programs is easily accomplished by
calling the target API functions directly from the test case functions. Common Test also integrates usage of the OTP
cover tool for code coverage analysis of Erlang/OTP programs.
Common Test executes test suite programs automatically, without operator interaction. Test progress and results is
printed to logs on HTML format, easily browsed with a standard web browser. Common Test also sends notifications
about progress and results via an OTP event manager to event handlers plugged in to the system. This way users can
integrate their own programs for e.g. logging, database storing or supervision with Common Test.
Common Test provides libraries that contain useful support functions to fill various testing needs and requirements.
There is for example support for flexible test declarations by means of so called test specifications. There is also
support for central configuration and control of multiple independent test sessions (towards different target systems)
running in parallel.
Common Test is implemented as a framework based on the OTP Test Server application.

但是common_test由于太强大了，新手使用起来会比较麻烦，经常会碰到些问题，不好解决。

这时候rebar来救助了，它的ct功能把common_test使用的麻烦给解决掉了，让你轻松做测试。
我们先来体验下：
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