Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

34 files changed, 762 insertions, 0 deletions

diff --git a/spec/ruby/core/struct/dig_spec.rb b/spec/ruby/core/struct/dig_spec.rb
new file mode 100644
index 0000000000..c222eec9e4
--- /dev/null
+++ b/spec/ruby/core/struct/dig_spec.rb
@@ -0,0 +1,44 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+ruby_version_is "2.3" do
+  describe "Struct#dig" do
+    before(:each) do
+      @klass = Struct.new(:a)
+      @instance = @klass.new(@klass.new({ b: [1, 2, 3] }))
+    end
+
+    it "returns the nested value specified by the sequence of keys" do
+      @instance.dig(:a, :a).should == { b: [1, 2, 3] }
+    end
+
+    it "returns the nested value specified if the sequence includes an index" do
+      @instance.dig(:a, :a, :b, 0).should == 1
+    end
+
+    it "returns nil if any intermediate step is nil" do
+      @instance.dig(:b, 0).should == nil
+    end
+
+    it "raises a TypeError if any intermediate step does not respond to #dig" do
+      instance = @klass.new(1)
+      lambda {
+        instance.dig(:a, 3)
+      }.should raise_error(TypeError)
+    end
+
+    it "raises an ArgumentError if no arguments provided" do
+      lambda { @instance.dig }.should raise_error(ArgumentError)
+    end
+
+    it "calls #dig on any intermediate step with the rest of the sequence as arguments" do
+      obj = Object.new
+      instance = @klass.new(obj)
+
+      def obj.dig(*args)
+        {dug: args}
+      end
+
+      instance.dig(:a, :bar, :baz).should == { dug: [:bar, :baz] }
+    end
+  end
+end
diff --git a/spec/ruby/core/struct/dup_spec.rb b/spec/ruby/core/struct/dup_spec.rb
new file mode 100644
index 0000000000..d1da31d6d5
--- /dev/null
+++ b/spec/ruby/core/struct/dup_spec.rb
@@ -0,0 +1,20 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct-based class#dup" do
+
+  # From https://github.com/jruby/jruby/issues/3686
+  it "retains an included module in the ancestor chain for the struct's singleton class" do
+    klass = Struct.new(:foo)
+    mod = Module.new do
+      def hello
+        "hello"
+      end
+    end
+
+    klass.extend(mod)
+    klass_dup = klass.dup
+    klass_dup.hello.should == "hello"
+  end
+
+end
diff --git a/spec/ruby/core/struct/each_pair_spec.rb b/spec/ruby/core/struct/each_pair_spec.rb
new file mode 100644
index 0000000000..79a962a6ad
--- /dev/null
+++ b/spec/ruby/core/struct/each_pair_spec.rb
@@ -0,0 +1,33 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__)
+
+describe "Struct#each_pair" do
+  before :each do
+    @car = StructClasses::Car.new('Ford', 'Ranger', 2001)
+  end
+
+  it "passes each key value pair to the given block" do
+    @car.each_pair do |key, value|
+      value.should == @car[key]
+    end
+  end
+
+  context "with a block variable" do
+    it "passes an array to the given block" do
+      @car.each_pair.map { |var| var }.should == StructClasses::Car.members.zip(@car.values)
+    end
+  end
+
+  it "returns self if passed a block" do
+    @car.each_pair {}.should equal(@car)
+  end
+
+  it "returns an Enumerator if not passed a block" do
+    @car.each_pair.should be_an_instance_of(Enumerator)
+  end
+
+  it_behaves_like :struct_accessor, :each_pair
+  it_behaves_like :enumeratorized_with_origin_size, :each_pair, StructClasses::Car.new('Ford', 'Ranger')
+end
diff --git a/spec/ruby/core/struct/each_spec.rb b/spec/ruby/core/struct/each_spec.rb
new file mode 100644
index 0000000000..86302d91c6
--- /dev/null
+++ b/spec/ruby/core/struct/each_spec.rb
@@ -0,0 +1,27 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__)
+
+describe "Struct#each" do
+  it "passes each value to the given block" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    i = -1
+    car.each do |value|
+      value.should == car[i += 1]
+    end
+  end
+
+  it "returns self if passed a block" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.each {}.should == car
+  end
+
+  it "returns an Enumerator if not passed a block" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.each.should be_an_instance_of(Enumerator)
+  end
+
+  it_behaves_like :struct_accessor, :each
+  it_behaves_like :enumeratorized_with_origin_size, :each, StructClasses::Car.new('Ford', 'Ranger')
+end
diff --git a/spec/ruby/core/struct/element_reference_spec.rb b/spec/ruby/core/struct/element_reference_spec.rb
new file mode 100644
index 0000000000..dc51fbfff1
--- /dev/null
+++ b/spec/ruby/core/struct/element_reference_spec.rb
@@ -0,0 +1,52 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct[]" do
+  it "is a synonym for new" do
+    StructClasses::Ruby['2.0', 'i686'].should be_kind_of(StructClasses::Ruby)
+  end
+end
+
+describe "Struct#[]" do
+  it "returns the attribute referenced" do
+    car = StructClasses::Car.new('Ford', 'Ranger', 1983)
+    car['make'].should == 'Ford'
+    car['model'].should == 'Ranger'
+    car['year'].should == 1983
+    car[:make].should == 'Ford'
+    car[:model].should == 'Ranger'
+    car[:year].should == 1983
+    car[0].should == 'Ford'
+    car[1].should == 'Ranger'
+    car[2].should == 1983
+    car[-3].should == 'Ford'
+    car[-2].should == 'Ranger'
+    car[-1].should == 1983
+  end
+
+  it "fails when it does not know about the requested attribute" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    lambda { car[3]        }.should raise_error(IndexError)
+    lambda { car[-4]       }.should raise_error(IndexError)
+    lambda { car[:body]    }.should raise_error(NameError)
+    lambda { car['wheels'] }.should raise_error(NameError)
+  end
+
+  it "fails if passed too many arguments" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    lambda { car[:make, :model] }.should raise_error(ArgumentError)
+  end
+
+  it "fails if not passed a string, symbol, or integer" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    lambda { car[Object.new] }.should raise_error(TypeError)
+  end
+
+  it "returns attribute names that contain hyphens" do
+    klass = Struct.new(:'current-state')
+    tuple = klass.new(0)
+    tuple['current-state'].should == 0
+    tuple[:'current-state'].should == 0
+    tuple[0].should == 0
+  end
+end
diff --git a/spec/ruby/core/struct/element_set_spec.rb b/spec/ruby/core/struct/element_set_spec.rb
new file mode 100644
index 0000000000..3d482bdb71
--- /dev/null
+++ b/spec/ruby/core/struct/element_set_spec.rb
@@ -0,0 +1,29 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#[]=" do
+  it "assigns the passed value" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+
+    car[:model] = 'Escape'
+    car[:model].should == 'Escape'
+
+    car['model'] = 'Fusion'
+    car[:model].should == 'Fusion'
+
+    car[1] = 'Excursion'
+    car[:model].should == 'Excursion'
+
+    car[-1] = '2000-2005'
+    car[:year].should == '2000-2005'
+  end
+
+  it "fails when trying to assign attributes which don't exist" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+
+    lambda { car[:something] = true }.should raise_error(NameError)
+    lambda { car[3] = true          }.should raise_error(IndexError)
+    lambda { car[-4] = true         }.should raise_error(IndexError)
+    lambda { car[Object.new] = true }.should raise_error(TypeError)
+  end
+end
diff --git a/spec/ruby/core/struct/eql_spec.rb b/spec/ruby/core/struct/eql_spec.rb
new file mode 100644
index 0000000000..dfa97811c6
--- /dev/null
+++ b/spec/ruby/core/struct/eql_spec.rb
@@ -0,0 +1,13 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/equal_value', __FILE__)
+
+describe "Struct#eql?" do
+  it_behaves_like(:struct_equal_value, :eql?)
+
+  it "returns false if any corresponding elements are not #eql?" do
+    car = StructClasses::Car.new("Honda", "Accord", 1998)
+    similar_car = StructClasses::Car.new("Honda", "Accord", 1998.0)
+    car.send(@method, similar_car).should be_false
+  end
+end
diff --git a/spec/ruby/core/struct/equal_value_spec.rb b/spec/ruby/core/struct/equal_value_spec.rb
new file mode 100644
index 0000000000..a343213417
--- /dev/null
+++ b/spec/ruby/core/struct/equal_value_spec.rb
@@ -0,0 +1,7 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/equal_value', __FILE__)
+
+describe "Struct#==" do
+  it_behaves_like(:struct_equal_value, :==)
+end
diff --git a/spec/ruby/core/struct/fixtures/classes.rb b/spec/ruby/core/struct/fixtures/classes.rb
new file mode 100644
index 0000000000..6d620f9060
--- /dev/null
+++ b/spec/ruby/core/struct/fixtures/classes.rb
@@ -0,0 +1,26 @@
+module StructClasses
+
+  class Apple < Struct; end
+
+  Ruby = Struct.new(:version, :platform)
+
+  Car = Struct.new(:make, :model, :year)
+
+  class Honda < Car
+    def initialize(*args)
+      self.make = "Honda"
+      super(*args)
+    end
+  end
+
+  class SubclassX < Struct
+  end
+
+  class SubclassX
+    attr_reader :key
+    def initialize(*)
+      @key = :value
+      super
+    end
+  end
+end
diff --git a/spec/ruby/core/struct/hash_spec.rb b/spec/ruby/core/struct/hash_spec.rb
new file mode 100644
index 0000000000..517d3ab44e
--- /dev/null
+++ b/spec/ruby/core/struct/hash_spec.rb
@@ -0,0 +1,46 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+
+describe "Struct#hash" do
+
+  it "returns the same fixnum for structs with the same content" do
+    [StructClasses::Ruby.new("1.8.6", "PPC"),
+     StructClasses::Car.new("Hugo", "Foo", "1972")].each do |stc|
+      stc.hash.should == stc.dup.hash
+      stc.hash.should be_kind_of(Fixnum)
+    end
+  end
+
+  it "returns the same value if structs are #eql?" do
+    car = StructClasses::Car.new("Honda", "Accord", "1998")
+    similar_car = StructClasses::Car.new("Honda", "Accord", "1998")
+    car.should eql(similar_car)
+    car.hash.should == similar_car.hash
+  end
+
+  it "allows for overriding methods in an included module" do
+    mod = Module.new do
+      def hash
+        "different"
+      end
+    end
+    s = Struct.new(:arg) do
+      include mod
+    end
+    s.new.hash.should == "different"
+  end
+
+  it "returns the same hash for recursive structs" do
+    car = StructClasses::Car.new("Honda", "Accord", "1998")
+    similar_car = StructClasses::Car.new("Honda", "Accord", "1998")
+    car[:make] = car
+    similar_car[:make] = car
+    car.hash.should == similar_car.hash
+    # This is because car.eql?(similar_car).
+    # Objects that are eql? must return the same hash.
+    # See the Struct#eql? specs
+  end
+
+  it_behaves_like :struct_accessor, :hash
+end
diff --git a/spec/ruby/core/struct/initialize_spec.rb b/spec/ruby/core/struct/initialize_spec.rb
new file mode 100644
index 0000000000..59fc5ef9aa
--- /dev/null
+++ b/spec/ruby/core/struct/initialize_spec.rb
@@ -0,0 +1,43 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#initialize" do
+
+  it "is private" do
+    StructClasses::Car.should have_private_instance_method(:initialize)
+  end
+
+  it 'allows valid Ruby method names for members' do
+    valid_method_names = [
+      :method1,
+      :method_1,
+      :method_1?,
+      :method_1!,
+      :a_method
+    ]
+    valid_method_names.each do |method_name|
+      klass = Struct.new(method_name)
+      instance = klass.new(:value)
+      instance.send(method_name).should == :value
+      writer_method = "#{method_name}=".to_sym
+      result = instance.send(writer_method, :new_value)
+      result.should == :new_value
+      instance.send(method_name).should == :new_value
+    end
+  end
+
+  it "does nothing when passed a set of fields equal to self" do
+    car = same_car = StructClasses::Car.new("Honda", "Accord", "1998")
+    car.instance_eval { initialize("Honda", "Accord", "1998") }
+    car.should == same_car
+  end
+
+  it "explicitly sets instance variables to nil when args not provided to initialize" do
+    car = StructClasses::Honda.new
+    car.make.should == nil # still nil despite override in Honda#initialize b/c of super order
+  end
+
+  it "can be overriden" do
+    StructClasses::SubclassX.new(:y).new.key.should == :value
+  end
+end
diff --git a/spec/ruby/core/struct/inspect_spec.rb b/spec/ruby/core/struct/inspect_spec.rb
new file mode 100644
index 0000000000..94fb71a5f1
--- /dev/null
+++ b/spec/ruby/core/struct/inspect_spec.rb
@@ -0,0 +1,15 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/inspect', __FILE__)
+
+describe "Struct#inspect" do
+  it "returns a string representation of some kind" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.inspect.should == '#<struct StructClasses::Car make="Ford", model="Ranger", year=nil>'
+
+    Whiskey = Struct.new(:name, :ounces)
+    Whiskey.new('Jack', 100).inspect.should == '#<struct Whiskey name="Jack", ounces=100>'
+  end
+
+  it_behaves_like(:struct_inspect, :inspect)
+end
diff --git a/spec/ruby/core/struct/instance_variables_spec.rb b/spec/ruby/core/struct/instance_variables_spec.rb
new file mode 100644
index 0000000000..3abb8578a5
--- /dev/null
+++ b/spec/ruby/core/struct/instance_variables_spec.rb
@@ -0,0 +1,16 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#instance_variables" do
+  it "returns an empty array if only attributes are defined" do
+    car = StructClasses::Car.new("Hugo", "Foo", "1972")
+    car.instance_variables.should == []
+  end
+
+  it "returns an array with one name if an instance variable is added" do
+    car = StructClasses::Car.new("Hugo", "Foo", "1972")
+    car.instance_variables.should == []
+    car.instance_variable_set("@test", 1)
+    car.instance_variables.should == [:@test]
+  end
+end
diff --git a/spec/ruby/core/struct/length_spec.rb b/spec/ruby/core/struct/length_spec.rb
new file mode 100644
index 0000000000..067bb08f88
--- /dev/null
+++ b/spec/ruby/core/struct/length_spec.rb
@@ -0,0 +1,12 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+
+describe "Struct#length" do
+  it "returns the number of attributes" do
+    StructClasses::Car.new('Cadillac', 'DeVille').length.should == 3
+    StructClasses::Car.new.length.should == 3
+  end
+
+  it_behaves_like :struct_accessor, :length
+end
diff --git a/spec/ruby/core/struct/members_spec.rb b/spec/ruby/core/struct/members_spec.rb
new file mode 100644
index 0000000000..702e536a55
--- /dev/null
+++ b/spec/ruby/core/struct/members_spec.rb
@@ -0,0 +1,13 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+
+describe "Struct#members" do
+  it "returns an array of attribute names" do
+    StructClasses::Car.new.members.should == [:make, :model, :year]
+    StructClasses::Car.new('Cadillac').members.should == [:make, :model, :year]
+    StructClasses::Ruby.members.should == [:version, :platform]
+  end
+
+  it_behaves_like :struct_accessor, :members
+end
diff --git a/spec/ruby/core/struct/new_spec.rb b/spec/ruby/core/struct/new_spec.rb
new file mode 100644
index 0000000000..314f749955
--- /dev/null
+++ b/spec/ruby/core/struct/new_spec.rb
@@ -0,0 +1,123 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct.new" do
+  it "creates a constant in Struct namespace with string as first argument" do
+    struct = Struct.new('Animal', :name, :legs, :eyeballs)
+    struct.should == Struct::Animal
+    struct.name.should == "Struct::Animal"
+  end
+
+  it "overwrites previously defined constants with string as first argument" do
+    first = Struct.new('Person', :height, :weight)
+    first.should == Struct::Person
+
+    second = nil
+    lambda {
+      second = Struct.new('Person', :hair, :sex)
+    }.should complain(/redefining constant/)
+    second.should == Struct::Person
+
+    first.members.should_not == second.members
+  end
+
+  it "calls to_str on its first argument (constant name)" do
+    obj = mock('Foo')
+    def obj.to_str() "Foo" end
+    struct = Struct.new(obj)
+    struct.should == Struct::Foo
+    struct.name.should == "Struct::Foo"
+  end
+
+  it "creates a new anonymous class with nil first argument" do
+    struct = Struct.new(nil, :foo)
+    struct.new("bar").foo.should == "bar"
+    struct.should be_kind_of(Class)
+    struct.name.should be_nil
+  end
+
+  it "creates a new anonymous class with symbol arguments" do
+    struct = Struct.new(:make, :model)
+    struct.should be_kind_of(Class)
+    struct.name.should == nil
+  end
+
+  it "does not create a constant with symbol as first argument" do
+    Struct.new(:Animal2, :name, :legs, :eyeballs)
+    Struct.const_defined?("Animal2").should be_false
+  end
+
+
+  it "fails with invalid constant name as first argument" do
+    lambda { Struct.new('animal', :name, :legs, :eyeballs) }.should raise_error(NameError)
+  end
+
+  it "raises a TypeError if object doesn't respond to to_sym" do
+    lambda { Struct.new(:animal, mock('giraffe'))      }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, 1.0)                  }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, Time.now)             }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, Class)                }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, nil)                  }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, true)                 }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, ['chris', 'evan'])    }.should raise_error(TypeError)
+    lambda { Struct.new(:animal, { name: 'chris' }) }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if object is not a Symbol" do
+    obj = mock(':ruby')
+    def obj.to_sym() :ruby end
+    lambda { Struct.new(:animal, obj) }.should raise_error(TypeError)
+  end
+
+  it "processes passed block with instance_eval" do
+    klass = Struct.new(:something) { @something_else = 'something else entirely!' }
+    klass.instance_variables.should include(:@something_else)
+  end
+
+  context "with a block" do
+    it "allows class to be modified via the block" do
+      klass = Struct.new(:version) do
+        def platform
+          :ruby
+        end
+      end
+      instance = klass.new('2.2')
+
+      instance.version.should == '2.2'
+      instance.platform.should == :ruby
+    end
+
+    it "passes same struct class to the block" do
+      given = nil
+      klass = Struct.new(:attr) do |block_parameter|
+        given = block_parameter
+      end
+      klass.should equal(given)
+    end
+  end
+
+  context "on subclasses" do
+    it "creates a constant in subclass' namespace" do
+      struct = StructClasses::Apple.new('Computer', :size)
+      struct.should == StructClasses::Apple::Computer
+    end
+
+    it "creates an instance" do
+      StructClasses::Ruby.new.kind_of?(StructClasses::Ruby).should == true
+    end
+
+    it "creates reader methods" do
+      StructClasses::Ruby.new.should have_method(:version)
+      StructClasses::Ruby.new.should have_method(:platform)
+    end
+
+    it "creates writer methods" do
+      StructClasses::Ruby.new.should have_method(:version=)
+      StructClasses::Ruby.new.should have_method(:platform=)
+    end
+
+    it "fails with too many arguments" do
+      lambda { StructClasses::Ruby.new('2.0', 'i686', true) }.should raise_error(ArgumentError)
+    end
+  end
+end
diff --git a/spec/ruby/core/struct/select_spec.rb b/spec/ruby/core/struct/select_spec.rb
new file mode 100644
index 0000000000..da80eea0e8
--- /dev/null
+++ b/spec/ruby/core/struct/select_spec.rb
@@ -0,0 +1,30 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__)
+
+describe "Struct#select" do
+  it "raises an ArgumentError if given any non-block arguments" do
+    lambda { StructClasses::Car.new.select(1) { } }.should raise_error(ArgumentError)
+  end
+
+  it "returns a new array of elements for which block is true" do
+    struct = StructClasses::Car.new("Toyota", "Tercel", "2000")
+    struct.select { |i| i == "2000" }.should == [ "2000" ]
+  end
+
+  it "returns an instance of Array" do
+    struct = StructClasses::Car.new("Ford", "Escort", "1995")
+    struct.select { true }.should be_an_instance_of(Array)
+  end
+
+  describe "without block" do
+    it "returns an instance of Enumerator" do
+      struct = Struct.new(:foo).new
+      struct.select.should be_an_instance_of(Enumerator)
+    end
+  end
+
+  it_behaves_like :struct_accessor, :select
+  it_behaves_like :enumeratorized_with_origin_size, :select, Struct.new(:foo).new
+end
diff --git a/spec/ruby/core/struct/shared/accessor.rb b/spec/ruby/core/struct/shared/accessor.rb
new file mode 100644
index 0000000000..dbf5e78f43
--- /dev/null
+++ b/spec/ruby/core/struct/shared/accessor.rb
@@ -0,0 +1,7 @@
+describe :struct_accessor, shared: true do
+  it "does not override the instance accessor method" do
+    struct = Struct.new(@method.to_sym)
+    instance = struct.new 42
+    instance.send(@method).should == 42
+  end
+end
diff --git a/spec/ruby/core/struct/shared/equal_value.rb b/spec/ruby/core/struct/shared/equal_value.rb
new file mode 100644
index 0000000000..711862cb44
--- /dev/null
+++ b/spec/ruby/core/struct/shared/equal_value.rb
@@ -0,0 +1,30 @@
+describe :struct_equal_value, shared: true do
+  it "returns true if the other is the same object" do
+    car = same_car = StructClasses::Car.new("Honda", "Accord", "1998")
+    car.send(@method, same_car).should == true
+  end
+
+  it "returns true if the other has all the same fields" do
+    car = StructClasses::Car.new("Honda", "Accord", "1998")
+    similar_car = StructClasses::Car.new("Honda", "Accord", "1998")
+    car.send(@method, similar_car).should == true
+  end
+
+  it "returns false if the other is a different object or has different fields" do
+    car = StructClasses::Car.new("Honda", "Accord", "1998")
+    different_car = StructClasses::Car.new("Honda", "Accord", "1995")
+    car.send(@method, different_car).should == false
+  end
+
+  it "handles recursive structures by returning false if a difference can be found" do
+    x = StructClasses::Car.new("Honda", "Accord", "1998")
+    x[:make] = x
+    stepping = StructClasses::Car.new("Honda", "Accord", "1998")
+    stone = StructClasses::Car.new(stepping, "Accord", "1998")
+    stepping[:make] = stone
+    x.send(@method, stepping).should == true
+
+    stone[:year] = "1999" # introduce a difference
+    x.send(@method, stepping).should == false
+  end
+end
diff --git a/spec/ruby/core/struct/shared/inspect.rb b/spec/ruby/core/struct/shared/inspect.rb
new file mode 100644
index 0000000000..90594a5452
--- /dev/null
+++ b/spec/ruby/core/struct/shared/inspect.rb
@@ -0,0 +1,5 @@
+describe :struct_inspect, shared: true do
+  it "returns a string representation without the class name for anonymous structs" do
+    Struct.new(:a).new("").send(@method).should == '#<struct a="">'
+  end
+end
diff --git a/spec/ruby/core/struct/size_spec.rb b/spec/ruby/core/struct/size_spec.rb
new file mode 100644
index 0000000000..29b1d2bfba
--- /dev/null
+++ b/spec/ruby/core/struct/size_spec.rb
@@ -0,0 +1,11 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+
+describe "Struct#size" do
+  it "is a synonym for length" do
+    StructClasses::Car.new.size.should == StructClasses::Car.new.length
+  end
+
+  it_behaves_like :struct_accessor, :size
+end
diff --git a/spec/ruby/core/struct/struct_spec.rb b/spec/ruby/core/struct/struct_spec.rb
new file mode 100644
index 0000000000..6c1941aed5
--- /dev/null
+++ b/spec/ruby/core/struct/struct_spec.rb
@@ -0,0 +1,43 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct" do
+  it "includes Enumerable" do
+    Struct.include?(Enumerable).should == true
+  end
+end
+
+describe "Struct anonymous class instance methods" do
+  it "includes Enumerable" do
+    StructClasses::Car.include?(Enumerable).should == true
+  end
+
+  it "reader method should be a synonym for []" do
+    klass = Struct.new(:clock, :radio)
+    alarm = klass.new(true)
+    alarm.clock.should == alarm[:clock]
+    alarm.radio.should == alarm['radio']
+  end
+
+  it "reader method should not interfere with undefined methods" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    lambda { car.something_weird }.should raise_error(NoMethodError)
+  end
+
+  it "writer method be a synonym for []=" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.model.should == 'Ranger'
+    car.model = 'F150'
+    car.model.should == 'F150'
+    car[:model].should == 'F150'
+    car['model'].should == 'F150'
+    car[1].should == 'F150'
+  end
+end
+
+describe "Struct subclasses" do
+  it "can be subclassed" do
+    compact = Class.new StructClasses::Car
+    compact.new.class.should == compact
+  end
+end
diff --git a/spec/ruby/core/struct/tms/cstime_spec.rb b/spec/ruby/core/struct/tms/cstime_spec.rb
new file mode 100644
index 0000000000..839b02b6e9
--- /dev/null
+++ b/spec/ruby/core/struct/tms/cstime_spec.rb
@@ -0,0 +1,9 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms#cstime" do
+  it "needs to be reviewed for spec completeness"
+end
+
+describe "Struct::Tms#cstime=" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/tms/cutime_spec.rb b/spec/ruby/core/struct/tms/cutime_spec.rb
new file mode 100644
index 0000000000..235f378fab
--- /dev/null
+++ b/spec/ruby/core/struct/tms/cutime_spec.rb
@@ -0,0 +1,9 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms#cutime" do
+  it "needs to be reviewed for spec completeness"
+end
+
+describe "Struct::Tms#cutime=" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/tms/element_reference_spec.rb b/spec/ruby/core/struct/tms/element_reference_spec.rb
new file mode 100644
index 0000000000..f1735341b4
--- /dev/null
+++ b/spec/ruby/core/struct/tms/element_reference_spec.rb
@@ -0,0 +1,5 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms.[]" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/tms/members_spec.rb b/spec/ruby/core/struct/tms/members_spec.rb
new file mode 100644
index 0000000000..ddfca83659
--- /dev/null
+++ b/spec/ruby/core/struct/tms/members_spec.rb
@@ -0,0 +1,5 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms.members" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/tms/new_spec.rb b/spec/ruby/core/struct/tms/new_spec.rb
new file mode 100644
index 0000000000..cf7a501aa2
--- /dev/null
+++ b/spec/ruby/core/struct/tms/new_spec.rb
@@ -0,0 +1,5 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms.new" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/tms/stime_spec.rb b/spec/ruby/core/struct/tms/stime_spec.rb
new file mode 100644
index 0000000000..f45253cf44
--- /dev/null
+++ b/spec/ruby/core/struct/tms/stime_spec.rb
@@ -0,0 +1,9 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms#stime" do
+  it "needs to be reviewed for spec completeness"
+end
+
+describe "Struct::Tms#stime=" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/tms/utime_spec.rb b/spec/ruby/core/struct/tms/utime_spec.rb
new file mode 100644
index 0000000000..ea6783a17b
--- /dev/null
+++ b/spec/ruby/core/struct/tms/utime_spec.rb
@@ -0,0 +1,9 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe "Struct::Tms#utime" do
+  it "needs to be reviewed for spec completeness"
+end
+
+describe "Struct::Tms#utime=" do
+  it "needs to be reviewed for spec completeness"
+end
diff --git a/spec/ruby/core/struct/to_a_spec.rb b/spec/ruby/core/struct/to_a_spec.rb
new file mode 100644
index 0000000000..f8e9a3658d
--- /dev/null
+++ b/spec/ruby/core/struct/to_a_spec.rb
@@ -0,0 +1,12 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/accessor', __FILE__)
+
+describe "Struct#to_a" do
+  it "returns the values for this instance as an array" do
+    StructClasses::Car.new('Geo', 'Metro', 1995).to_a.should == ['Geo', 'Metro', 1995]
+    StructClasses::Car.new('Ford').to_a.should == ['Ford', nil, nil]
+  end
+
+  it_behaves_like :struct_accessor, :to_a
+end
diff --git a/spec/ruby/core/struct/to_h_spec.rb b/spec/ruby/core/struct/to_h_spec.rb
new file mode 100644
index 0000000000..6b8037f950
--- /dev/null
+++ b/spec/ruby/core/struct/to_h_spec.rb
@@ -0,0 +1,15 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#to_h" do
+  it "returns a Hash with members as keys" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.to_h.should == {make: "Ford", model: "Ranger", year: nil}
+  end
+
+  it "returns a Hash that is independent from the struct" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.to_h[:make] = 'Suzuki'
+    car.make.should == 'Ford'
+  end
+end
diff --git a/spec/ruby/core/struct/to_s_spec.rb b/spec/ruby/core/struct/to_s_spec.rb
new file mode 100644
index 0000000000..b9fd413093
--- /dev/null
+++ b/spec/ruby/core/struct/to_s_spec.rb
@@ -0,0 +1,12 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/inspect', __FILE__)
+
+describe "Struct#to_s" do
+  it "is a synonym for inspect" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.inspect.should == car.to_s
+  end
+
+  it_behaves_like(:struct_inspect, :to_s)
+end
diff --git a/spec/ruby/core/struct/values_at_spec.rb b/spec/ruby/core/struct/values_at_spec.rb
new file mode 100644
index 0000000000..58016e2f2a
--- /dev/null
+++ b/spec/ruby/core/struct/values_at_spec.rb
@@ -0,0 +1,16 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#values_at" do
+  it "returns an array of values" do
+    clazz = Struct.new(:name, :director, :year)
+    movie = clazz.new('Sympathy for Mr. Vengence', 'Chan-wook Park', 2002)
+    movie.values_at(0, 1).should == ['Sympathy for Mr. Vengence', 'Chan-wook Park']
+    movie.values_at(0..2).should == ['Sympathy for Mr. Vengence', 'Chan-wook Park', 2002]
+  end
+
+  it "fails when passed unsupported types" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    lambda { car.values_at('make') }.should raise_error(TypeError)
+  end
+end
diff --git a/spec/ruby/core/struct/values_spec.rb b/spec/ruby/core/struct/values_spec.rb
new file mode 100644
index 0000000000..0e86d33cb5
--- /dev/null
+++ b/spec/ruby/core/struct/values_spec.rb
@@ -0,0 +1,11 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#values" do
+  it "is a synonym for to_a" do
+    car = StructClasses::Car.new('Nissan', 'Maxima')
+    car.values.should == car.to_a
+
+    StructClasses::Car.new.values.should == StructClasses::Car.new.to_a
+  end
+end