diff options
Diffstat (limited to 'spec/rubyspec/core/module/remove_const_spec.rb')
-rw-r--r-- | spec/rubyspec/core/module/remove_const_spec.rb | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/spec/rubyspec/core/module/remove_const_spec.rb b/spec/rubyspec/core/module/remove_const_spec.rb new file mode 100644 index 0000000000..0c1b87598e --- /dev/null +++ b/spec/rubyspec/core/module/remove_const_spec.rb @@ -0,0 +1,84 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../../../fixtures/constants', __FILE__) + +describe "Module#remove_const" do + it "removes the constant specified by a String or Symbol from the receiver's constant table" do + ConstantSpecs::ModuleM::CS_CONST252 = :const252 + ConstantSpecs::ModuleM::CS_CONST252.should == :const252 + + ConstantSpecs::ModuleM.send :remove_const, :CS_CONST252 + lambda { ConstantSpecs::ModuleM::CS_CONST252 }.should raise_error(NameError) + + ConstantSpecs::ModuleM::CS_CONST253 = :const253 + ConstantSpecs::ModuleM::CS_CONST253.should == :const253 + + ConstantSpecs::ModuleM.send :remove_const, "CS_CONST253" + lambda { ConstantSpecs::ModuleM::CS_CONST253 }.should raise_error(NameError) + end + + it "returns the value of the removed constant" do + ConstantSpecs::ModuleM::CS_CONST254 = :const254 + ConstantSpecs::ModuleM.send(:remove_const, :CS_CONST254).should == :const254 + end + + it "raises a NameError and does not call #const_missing if the constant is not defined" do + ConstantSpecs.should_not_receive(:const_missing) + lambda { ConstantSpecs.send(:remove_const, :Nonexistent) }.should raise_error(NameError) + end + + it "raises a NameError and does not call #const_missing if the constant is not defined directly in the module" do + begin + ConstantSpecs::ModuleM::CS_CONST255 = :const255 + ConstantSpecs::ContainerA::CS_CONST255.should == :const255 + ConstantSpecs::ContainerA.should_not_receive(:const_missing) + + lambda do + ConstantSpecs::ContainerA.send :remove_const, :CS_CONST255 + end.should raise_error(NameError) + ensure + ConstantSpecs::ModuleM.send :remove_const, "CS_CONST255" + end + end + + it "raises a NameError if the name does not start with a capital letter" do + lambda { ConstantSpecs.send :remove_const, "name" }.should raise_error(NameError) + end + + it "raises a NameError if the name starts with a non-alphabetic character" do + lambda { ConstantSpecs.send :remove_const, "__CONSTX__" }.should raise_error(NameError) + lambda { ConstantSpecs.send :remove_const, "@Name" }.should raise_error(NameError) + lambda { ConstantSpecs.send :remove_const, "!Name" }.should raise_error(NameError) + lambda { ConstantSpecs.send :remove_const, "::Name" }.should raise_error(NameError) + end + + it "raises a NameError if the name contains non-alphabetic characters except '_'" do + ConstantSpecs::ModuleM::CS_CONST256 = :const256 + ConstantSpecs::ModuleM.send :remove_const, "CS_CONST256" + lambda { ConstantSpecs.send :remove_const, "Name=" }.should raise_error(NameError) + lambda { ConstantSpecs.send :remove_const, "Name?" }.should raise_error(NameError) + end + + it "calls #to_str to convert the given name to a String" do + ConstantSpecs::CS_CONST257 = :const257 + name = mock("CS_CONST257") + name.should_receive(:to_str).and_return("CS_CONST257") + ConstantSpecs.send(:remove_const, name).should == :const257 + end + + it "raises a TypeError if conversion to a String by calling #to_str fails" do + name = mock('123') + lambda { ConstantSpecs.send :remove_const, name }.should raise_error(TypeError) + + name.should_receive(:to_str).and_return(123) + lambda { ConstantSpecs.send :remove_const, name }.should raise_error(TypeError) + end + + it "is a private method" do + Module.private_methods.should include(:remove_const) + end + + it "returns nil when removing autoloaded constant" do + ConstantSpecs.autoload :AutoloadedConstant, 'a_file' + ConstantSpecs.send(:remove_const, :AutoloadedConstant).should be_nil + end +end |