Erlang Programming/Unit Testing with eunit

Installing eunit This section will show you how to install eunit on different operating systems. Once you have installed eunit its use is fairly consistent across the different operating systems. ubuntu Get source with: svn co http://svn.process-one.net/contribs/trunk/eunit eunit Compile code with: .../eunit$ make Copy to /usr/lib/erlang/lib Test the Installation To test that everything is installed ok before writing any tests create a file test01.erl with the following contents: -module(test01). -compile(export_all). -include_lib("eunit/include/eunit.hrl"). Compile this file as follows: $ erl > c(test01). {ok,test01} If you get the result {ok,test01} then you've installed eunit correctly. Using eunit We'll start by writing a passing test and a failing test. In the file you created to check the installation add the following: passing_test() -> ?assert(true). failing_test() -> ?assert(false). Run the tests as follows. Eshell V5.5.5 (abort with ^G) 1> c(test01). {ok,test01} 2> test01:test(). test01:failing_test...*failed* ::error:{assertion_failed,[{module,test01}, {line,29}, {expression,"false"}, {expected,true}, {value,false}]} in function test01:'-failing_test/0-fun-0-'/0 ======================================================= Failed: 1. Aborted: 0. Skipped: 0. Succeeded: 3. error 3>