Added src directory

src/about_control_statements.rb

@@ -0,0 +1,116 @@
+require 'edgecase'
+
+class AboutControlStatements < EdgeCase::Koan
+
+  def test_if_then_else_statements
+    if true
+      result = :true_value
+    else
+      result = :false_value
+    end
+    assert_equal __, result
+  end
+
+  def test_if_then_else_statements
+    result = :default_value
+    if true
+      result = :true_value
+    end
+    assert_equal __(:true_value), result
+  end
+
+  def test_if_statements_return_values
+    value = if true
+              :true_value
+            else
+              :false_value
+            end
+    assert_equal __(:true_value), value
+
+    value = if false
+              :true_value
+            else
+              :false_value
+            end
+    assert_equal __(:false_value), value
+
+    # NOTE: Actually, EVERY statement in Ruby will return a value, not
+    # just if statements.
+  end
+
+  def test_if_statements_with_no_else_with_false_condition_return_value
+    value = if false
+              :true_value
+            end
+    assert_equal __(nil), value
+  end
+
+  def test_condition_operators
+    assert_equal __(:true_value), (true ? :true_value : :false_value)
+    assert_equal __(:false_value), (false ? :true_value : :false_value)
+  end
+
+  def test_if_statement_modifiers
+    result = :default_value
+    result = :true_value if true
+
+    assert_equal __(:true_value), result
+  end
+
+  def test_unless_statement
+    result = :default_value
+    unless false
+      result = :false_value
+    end
+    assert_equal __(:false_value), result
+  end
+
+  def test_unless_statement_modifier
+    result = :default_value
+    result = :false_value unless false
+
+    assert_equal __(:false_value), result
+  end
+
+  def test_while_statement
+    i = 1
+    result = 1
+    while i <= 10
+      result = result * i
+      i += 1
+    end
+    assert_equal __(3628800), result
+  end
+
+  def test_break_statement
+    i = 1
+    result = 1
+    while true
+      break unless i <= 10
+      result = result * i
+      i += 1
+    end
+    assert_equal __(3628800), result
+  end
+
+  def test_next_statement
+    i = 0
+    result = []
+    while i < 10
+      i += 1
+      next if (i % 2) == 0
+      result << i 
+    end
+    assert_equal __([1, 3, 5, 7, 9]), result
+  end
+
+  def test_for_statement
+    array = ["fish", "and", "chips"]
+    result = []
+    for item in array
+      result << item.upcase
+    end
+    assert_equal [__("FISH"), __("AND"), __("CHIPS")], result
+  end
+
+end