=begin
= RUNIT::TestSuite class

== SuperClass:
* Array

== Methods:

: add(test)
      Adds ((|test|)) case to test suite.

: add_test(test)
      alias of add.

: count_test_cases
      Returns how many test cases.

: extend_test(module ... )
      Calls extend_test of each test cases.

: run(result)
      Runs test suite. 
      The argument specifies ((<RUNIT::TestResult|URL:./testresult.html>)) object to store test result.

=end

