Remove koans directory from source control.

[ruby_koans.git] / koans / about_java_interop.rb

diff --git a/koans/about_java_interop.rb b/koans/about_java_interop.rb
deleted file mode 100644 (file)
index 4d35d5d..0000000
--- a/koans/about_java_interop.rb
+++ /dev/null
@@ -1,137 +0,0 @@
-require File.expand_path(File.dirname(__FILE__) + '/edgecase')
-
-include Java
-
-# Concepts
-# * Pull in a java class
-# * calling a method, Camel vs snake
-# * Resolving module/class name conflicts
-# * Showing what gets returned
-# * Ruby Strings  VS Java Strings
-# * Calling custom java class
-# * Calling Ruby from java???
-
-class AboutJavaInterop < EdgeCase::Koan
-  def test_using_a_java_library_class
-    java_array = java.util.ArrayList.new
-    assert_equal __, java_array.class
-  end
-
-  def test_java_class_can_be_referenced_using_both_ruby_and_java_like_syntax
-    assert_equal __, Java::JavaUtil::ArrayList == java.util.ArrayList
-  end
-
-  def test_include_class_includes_class_in_module_scope
-    assert_nil defined?(TreeSet)
-    include_class "java.util.TreeSet"
-    assert_equal __, defined?(TreeSet)
-  end
-
-  # THINK ABOUT IT:
-  #
-  # What if we use:
-  #
-  #   include_class "java.lang.String"
-  #
-  # What would be the value of the String constant after this
-  # include_class is run?  Would it be useful to provide a way of
-  # aliasing java classes to different names?
-
-  JString = java.lang.String
-  def test_also_java_class_can_be_given_ruby_aliases
-    java_string = JString.new("A Java String")
-    assert_equal __, java_string.class
-    assert_equal __, JString
-  end
-
-  def test_can_directly_call_java_methods_on_java_objects
-    java_string = JString.new("A Java String")
-    assert_equal __, java_string.toLowerCase
-  end
-
-  def test_jruby_provides_snake_case_versions_of_java_methods
-    java_string = JString.new("A Java String")
-    assert_equal __, java_string.to_lower_case
-  end
-
-  def test_jruby_provides_question_mark_versions_of_boolean_methods
-    java_string = JString.new("A Java String")
-    assert_equal __, java_string.endsWith("String")
-    assert_equal __, java_string.ends_with("String")
-    assert_equal __, java_string.ends_with?("String")
-  end
-
-  def test_java_string_are_not_ruby_strings
-    ruby_string = "A Java String"
-    java_string = java.lang.String.new(ruby_string)
-    assert_equal __, java_string.is_a?(java.lang.String)
-    assert_equal __, java_string.is_a?(String)
-  end
-
-  def test_java_strings_can_be_compared_to_ruby_strings_maybe
-    ruby_string = "A Java String"
-    java_string = java.lang.String.new(ruby_string)
-    assert_equal __, ruby_string == java_string
-    assert_equal __, java_string == ruby_string
-
-    # THINK ABOUT IT:
-    #
-    # Is there any possible way for this to be more wrong?
-    #
-    # SERIOUSLY, THINK ABOUT IT:
-    #
-    # Why do you suppose that Ruby and Java strings compare like that?
-    #
-    # ADVANCED THINK ABOUT IT:
-    #
-    # Is there a way to make Ruby/Java string comparisons commutative?
-    # How would you do it?
-  end
-
-  def test_however_most_methods_returning_strings_return_ruby_strings
-    java_array = java.util.ArrayList.new
-    assert_equal __, java_array.toString
-    assert_equal __, java_array.toString.is_a?(String)
-    assert_equal __, java_array.toString.is_a?(java.lang.String)
-  end
-
-  def test_some_ruby_objects_can_be_coerced_to_java
-    assert_equal __, "ruby string".to_java.class
-    assert_equal __, 1.to_java.class
-    assert_equal __, 9.32.to_java.class
-    assert_equal __, false.to_java.class
-  end
-
-  def test_some_ruby_objects_are_not_coerced_to_what_you_might_expect
-    assert_equal __, [].to_java.class == Java::JavaUtil::ArrayList
-    assert_equal __, {}.to_java.class == Java::JavaUtil::HashMap
-    assert_equal __, Object.new.to_java.class == Java::JavaLang::Object
-  end
-
-  def test_java_collections_are_enumerable
-    java_array = java.util.ArrayList.new
-    java_array << "one" << "two" << "three"
-    assert_equal __, java_array.map { |item| item.upcase }
-  end
-
-  # ------------------------------------------------------------------
-
-  # Open the Java ArrayList class and add a new method.
-  class Java::JavaUtil::ArrayList
-    def multiply_all
-      result = 1
-      each do |item|
-        result *= item
-      end
-      result
-    end
-  end
-
-  def test_java_class_are_open_from_ruby
-    java_array = java.util.ArrayList.new
-    java_array.add_all([1,2,3,4,5])
-
-    assert_equal __, java_array.multiply_all
-  end
-
-end