Added sample test for Test::Unit

samples/test_unit/adder.rb

@@ -0,0 +1,20 @@
+class Adder #comment
+
+  def initialize(num)
+    @num = num
+  end
+
+  def plus(other_num)
+    @num + other_num
+  end
+
+  def foobar
+    baz
+  end
+
+  def baz
+    raise "problem"
+  end
+
+
+end

samples/test_unit/adder_test.rb

@@ -0,0 +1,56 @@
+require 'test/unit'
+require File.dirname(__FILE__)+'/adder'
+
+class AdderTest < Test::Unit::TestCase
+  include Math
+
+  def test_foo
+    raise "crash!"
+  end
+
+  def test_plus__num_is_zero
+    assert_equal 7, Adder.new(0).plus(7)
+  end
+
+  def test_missing_method
+    assert Adder.new(0).foobar
+  end
+
+  def test_plus__other_is_zero
+    assert_equal 5, Adder.new(5).plus(0)
+  end
+
+  def test_plus__num_is_non_zero
+    assert_equal 9, Adder.new(2).plus(7)
+  end
+
+  def test_plus__other_is_non_zero
+    assert_equal 8, Adder.new(5).plus(3)
+  end
+
+  def test_plus__one_and_one
+    assert_equal 2, Adder.new(1).plus(1)
+  end  
+
+  def test_plus__one_and_two
+    assert_equal 2, Adder.new(1).plus(2)
+  end
+
+  def test_plus__one_and_three
+    assert_equal 4, Adder.new(1).plus(3)
+  end
+
+  def test_plus__one_and_four
+    assert_equal 5, Adder.new(1).plus(4)
+  end
+
+  def test_flunk
+    x = true
+    if(x)
+      flunk
+    else
+      assert true
+    end
+  end 
+
+end