1 files changed, 76 insertions, 0 deletions
diff --git a/spec/rubyspec/core/module/class_variable_get_spec.rb b/spec/rubyspec/core/module/class_variable_get_spec.rb
new file mode 100644
index 0000000000..7068801cc0
--- /dev/null
+++ b/spec/rubyspec/core/module/class_variable_get_spec.rb
@@ -0,0 +1,76 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Module#class_variable_get" do
+  it "returns the value of the class variable with the given name" do
+    c = Class.new { class_variable_set :@@class_var, "test" }
+    c.send(:class_variable_get, :@@class_var).should == "test"
+    c.send(:class_variable_get, "@@class_var").should == "test"
+  end
+
+  it "returns the value of a class variable with the given name defined in an included module" do
+    c = Class.new { include ModuleSpecs::MVars }
+    c.send(:class_variable_get, "@@mvar").should == :mvar
+  end
+
+  it "raises a NameError for a class variable named '@@'" do
+    c = Class.new
+    lambda { c.send(:class_variable_get, "@@") }.should raise_error(NameError)
+    lambda { c.send(:class_variable_get, :"@@") }.should raise_error(NameError)
+  end
+
+  it "raises a NameError for a class variables with the given name defined in an extended module" do
+    c = Class.new
+    c.extend ModuleSpecs::MVars
+    lambda {
+      c.send(:class_variable_get, "@@mvar")
+    }.should raise_error(NameError)
+  end
+
+  it "returns class variables defined in the class body and accessed in the metaclass" do
+    ModuleSpecs::CVars.cls.should == :class
+  end
+
+  it "returns class variables defined in the metaclass and accessed by class methods" do
+    ModuleSpecs::CVars.meta.should == :metainfo
+  end
+
+  it "returns class variables defined in the metaclass and accessed by instance methods" do
+    ModuleSpecs::CVars.new.meta.should == :metainfo
+  end
+
+  it "returns a class variable defined in a metaclass" do
+    obj = mock("metaclass class variable")
+    meta = obj.singleton_class
+    meta.send :class_variable_set, :@@var, :cvar_value
+    meta.send(:class_variable_get, :@@var).should == :cvar_value
+  end
+
+  it "raises a NameError when an uninitialized class variable is accessed" do
+    c = Class.new
+    [:@@no_class_var, "@@no_class_var"].each do |cvar|
+      lambda  { c.send(:class_variable_get, cvar) }.should raise_error(NameError)
+    end
+  end
+
+  it "raises a NameError when the given name is not allowed" do
+    c = Class.new
+
+    lambda { c.send(:class_variable_get, :invalid_name)   }.should raise_error(NameError)
+    lambda { c.send(:class_variable_get, "@invalid_name") }.should raise_error(NameError)
+  end
+
+  it "converts a non string/symbol/fixnum name to string using to_str" do
+    c = Class.new { class_variable_set :@@class_var, "test" }
+    (o = mock('@@class_var')).should_receive(:to_str).and_return("@@class_var")
+    c.send(:class_variable_get, o).should == "test"
+  end
+
+  it "raises a TypeError when the given names can't be converted to strings using to_str" do
+    c = Class.new { class_variable_set :@@class_var, "test" }
+    o = mock('123')
+    lambda { c.send(:class_variable_get, o) }.should raise_error(TypeError)
+    o.should_receive(:to_str).and_return(123)
+    lambda { c.send(:class_variable_get, o) }.should raise_error(TypeError)
+  end
+end