1 files changed, 157 insertions, 0 deletions
diff --git a/spec/ruby/core/class/new_spec.rb b/spec/ruby/core/class/new_spec.rb
new file mode 100644
index 0000000000..111e31252e
--- /dev/null
+++ b/spec/ruby/core/class/new_spec.rb
@@ -0,0 +1,157 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Class.new with a block given" do
+  it "yields the new class as self in the block" do
+    self_in_block = nil
+    klass = Class.new do
+      self_in_block = self
+    end
+    self_in_block.should.equal? klass
+  end
+
+  it "uses the given block as the class' body" do
+    klass = Class.new do
+      def self.message
+        "text"
+      end
+
+      def hello
+        "hello again"
+      end
+    end
+
+    klass.message.should == "text"
+    klass.new.hello.should == "hello again"
+  end
+
+  it "creates a subclass of the given superclass" do
+    sc = Class.new do
+      def self.body
+        @body
+      end
+      @body = self
+      def message; "text"; end
+    end
+    klass = Class.new(sc) do
+      def self.body
+        @body
+      end
+      @body = self
+      def message2; "hello"; end
+    end
+
+    klass.body.should == klass
+    sc.body.should == sc
+    klass.superclass.should == sc
+    klass.new.message.should == "text"
+    klass.new.message2.should == "hello"
+  end
+
+  it "runs the inherited hook after yielding the block" do
+    ScratchPad.record []
+    klass = Class.new(CoreClassSpecs::Inherited::D) do
+      ScratchPad << self
+    end
+
+    ScratchPad.recorded.should == [CoreClassSpecs::Inherited::D, klass]
+  end
+end
+
+describe "Class.new" do
+  it "creates a new anonymous class" do
+    klass = Class.new
+    klass.is_a?(Class).should == true
+
+    klass_instance = klass.new
+    klass_instance.is_a?(klass).should == true
+  end
+
+  it "raises a TypeError if passed a metaclass" do
+    obj = mock("Class.new metaclass")
+    meta = obj.singleton_class
+    -> { Class.new meta }.should.raise(TypeError)
+  end
+
+  it "creates a class without a name" do
+    Class.new.name.should == nil
+  end
+
+  it "creates a class that can be given a name by assigning it to a constant" do
+    ::MyClass = Class.new
+    ::MyClass.name.should == "MyClass"
+    a = Class.new
+    MyClass::NestedClass = a
+    MyClass::NestedClass.name.should == "MyClass::NestedClass"
+  ensure
+    Object.send(:remove_const, :MyClass)
+  end
+
+  it "sets the new class' superclass to the given class" do
+    top = Class.new
+    Class.new(top).superclass.should == top
+  end
+
+  it "sets the new class' superclass to Object when no class given" do
+    Class.new.superclass.should == Object
+  end
+
+  it "raises a TypeError when given a non-Class" do
+    error_msg = /superclass must be a.*Class/
+    -> { Class.new("")              }.should.raise(TypeError, error_msg)
+    -> { Class.new(1)               }.should.raise(TypeError, error_msg)
+    -> { Class.new(:symbol)         }.should.raise(TypeError, error_msg)
+    -> { Class.new(mock('o'))       }.should.raise(TypeError, error_msg)
+    -> { Class.new(Module.new)      }.should.raise(TypeError, error_msg)
+    -> { Class.new(BasicObject.new) }.should.raise(TypeError, error_msg)
+  end
+end
+
+describe "Class#new" do
+  it "returns a new instance of self" do
+    klass = Class.new
+    klass.new.is_a?(klass).should == true
+  end
+
+  it "invokes #initialize on the new instance with the given args" do
+    klass = Class.new do
+      def initialize(*args)
+        @initialized = true
+        @args = args
+      end
+
+      def args
+        @args
+      end
+
+      def initialized?
+        @initialized || false
+      end
+    end
+
+    klass.new.should.initialized?
+    klass.new(1, 2, 3).args.should == [1, 2, 3]
+  end
+
+  it "uses the internal allocator and does not call #allocate" do
+    klass = Class.new do
+      def self.allocate
+        raise "allocate should not be called"
+      end
+    end
+
+    instance = klass.new
+    instance.should.is_a? klass
+    instance.class.should.equal? klass
+  end
+
+  it "passes the block to #initialize" do
+    klass = Class.new do
+      def initialize
+        yield
+      end
+    end
+
+    klass.new { break 42 }.should == 42
+  end
+end