Added src directory

src/about_true_and_false.rb

@@ -0,0 +1,33 @@
+require 'edgecase'
+
+class AboutTrueAndFalse < EdgeCase::Koan
+  def truth_value(condition)
+    if condition
+      :true_stuff
+    else
+      :false_stuff
+    end
+  end
+
+  def test_true_is_treated_as_true
+    assert_equal __(:true_stuff), truth_value(true)    
+  end
+
+  def test_false_is_treated_as_false
+    assert_equal __(:false_stuff), truth_value(false)
+  end
+
+  def test_nil_is_treated_as_false_too
+    assert_equal __(:false_stuff), truth_value(nil)
+  end
+
+  def test_everything_else_is_treated_as_true
+    assert_equal __(:true_stuff), truth_value(1)
+    assert_equal __(:true_stuff), truth_value(0)
+    assert_equal __(:true_stuff), truth_value([])
+    assert_equal __(:true_stuff), truth_value({})
+    assert_equal __(:true_stuff), truth_value("Strings")
+    assert_equal __(:true_stuff), truth_value("")
+  end
+
+end