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Diffstat (limited to 'spec/ruby/core/module/const_defined_spec.rb')
| -rw-r--r-- | spec/ruby/core/module/const_defined_spec.rb | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/spec/ruby/core/module/const_defined_spec.rb b/spec/ruby/core/module/const_defined_spec.rb new file mode 100644 index 0000000000..8b137cd134 --- /dev/null +++ b/spec/ruby/core/module/const_defined_spec.rb @@ -0,0 +1,169 @@ +# encoding: utf-8 + +require_relative '../../spec_helper' +require_relative '../../fixtures/constants' +require_relative 'fixtures/constant_unicode' + +describe "Module#const_defined?" do + it "returns true if the given Symbol names a constant defined in the receiver" do + ConstantSpecs.const_defined?(:CS_CONST2).should == true + ConstantSpecs.const_defined?(:ModuleA).should == true + ConstantSpecs.const_defined?(:ClassA).should == true + ConstantSpecs::ContainerA.const_defined?(:ChildA).should == true + end + + it "returns true if the constant is defined in the receiver's superclass" do + # CS_CONST4 is defined in the superclass of ChildA + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST4).should be_true + end + + it "returns true if the constant is defined in a mixed-in module of the receiver's parent" do + # CS_CONST10 is defined in a module included by ChildA + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST10).should be_true + end + + it "returns true if the constant is defined in a mixed-in module (with prepends) of the receiver" do + # CS_CONST11 is defined in the module included by ContainerPrepend + ConstantSpecs::ContainerPrepend.const_defined?(:CS_CONST11).should be_true + end + + it "returns true if the constant is defined in Object and the receiver is a module" do + # CS_CONST1 is defined in Object + ConstantSpecs::ModuleA.const_defined?(:CS_CONST1).should be_true + end + + it "returns true if the constant is defined in Object and the receiver is a class that has Object among its ancestors" do + # CS_CONST1 is defined in Object + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST1).should be_true + end + + it "returns false if the constant is defined in the receiver's superclass and the inherit flag is false" do + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST4, false).should be_false + end + + it "returns true if the constant is defined in the receiver's superclass and the inherit flag is true" do + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST4, true).should be_true + end + + it "coerces the inherit flag to a boolean" do + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST4, nil).should be_false + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST4, :true).should be_true + end + + it "returns true if the given String names a constant defined in the receiver" do + ConstantSpecs.const_defined?("CS_CONST2").should == true + ConstantSpecs.const_defined?("ModuleA").should == true + ConstantSpecs.const_defined?("ClassA").should == true + ConstantSpecs::ContainerA.const_defined?("ChildA").should == true + end + + it "returns true when passed a constant name with unicode characters" do + ConstantUnicodeSpecs.const_defined?("CS_CONSTĪ»").should be_true + end + + it "returns true when passed a constant name with EUC-JP characters" do + str = "CS_CONSTĪ»".encode("euc-jp") + ConstantSpecs.const_set str, 1 + ConstantSpecs.const_defined?(str).should be_true + ensure + ConstantSpecs.send(:remove_const, str) + end + + it "returns false if the constant is not defined in the receiver, its superclass, or any included modules" do + # The following constant isn't defined at all. + ConstantSpecs::ContainerA::ChildA.const_defined?(:CS_CONST4726).should be_false + # DETACHED_CONSTANT is defined in ConstantSpecs::Detached, which isn't + # included by or inherited from ParentA + ConstantSpecs::ParentA.const_defined?(:DETACHED_CONSTANT).should be_false + end + + it "does not call #const_missing if the constant is not defined in the receiver" do + ConstantSpecs::ClassA.should_not_receive(:const_missing) + ConstantSpecs::ClassA.const_defined?(:CS_CONSTX).should == false + end + + describe "converts the given name to a String using #to_str" do + it "calls #to_str to convert the given name to a String" do + name = mock("ClassA") + name.should_receive(:to_str).and_return("ClassA") + ConstantSpecs.const_defined?(name).should == true + end + + it "raises a TypeError if the given name can't be converted to a String" do + -> { ConstantSpecs.const_defined?(nil) }.should raise_error(TypeError) + -> { ConstantSpecs.const_defined?([]) }.should raise_error(TypeError) + end + + it "raises a NoMethodError if the given argument raises a NoMethodError during type coercion to a String" do + name = mock("classA") + name.should_receive(:to_str).and_raise(NoMethodError) + -> { ConstantSpecs.const_defined?(name) }.should raise_error(NoMethodError) + end + end + + it "special cases Object and checks it's included Modules" do + Object.const_defined?(:CS_CONST10).should be_true + end + + it "returns true for toplevel constant when the name begins with '::'" do + ConstantSpecs.const_defined?("::Array").should be_true + end + + it "returns true when passed a scoped constant name" do + ConstantSpecs.const_defined?("ClassC::CS_CONST1").should be_true + end + + it "returns true when passed a scoped constant name for a constant in the inheritance hierarchy and the inherited flag is default" do + ConstantSpecs::ClassD.const_defined?("ClassE::CS_CONST2").should be_true + end + + it "returns true when passed a scoped constant name for a constant in the inheritance hierarchy and the inherited flag is true" do + ConstantSpecs::ClassD.const_defined?("ClassE::CS_CONST2", true).should be_true + end + + it "returns false when passed a scoped constant name for a constant in the inheritance hierarchy and the inherited flag is false" do + ConstantSpecs::ClassD.const_defined?("ClassE::CS_CONST2", false).should be_false + end + + it "returns false when the name begins with '::' and the toplevel constant does not exist" do + ConstantSpecs.const_defined?("::Name").should be_false + end + + it "raises a NameError if the name does not start with a capital letter" do + -> { ConstantSpecs.const_defined? "name" }.should raise_error(NameError) + end + + it "raises a NameError if the name starts with '_'" do + -> { ConstantSpecs.const_defined? "__CONSTX__" }.should raise_error(NameError) + end + + it "raises a NameError if the name starts with '@'" do + -> { ConstantSpecs.const_defined? "@Name" }.should raise_error(NameError) + end + + it "raises a NameError if the name starts with '!'" do + -> { ConstantSpecs.const_defined? "!Name" }.should raise_error(NameError) + end + + it "returns true or false for the nested name" do + ConstantSpecs.const_defined?("NotExist::Name").should == false + ConstantSpecs.const_defined?("::Name").should == false + ConstantSpecs.const_defined?("::Object").should == true + ConstantSpecs.const_defined?("ClassA::CS_CONST10").should == true + ConstantSpecs.const_defined?("ClassA::CS_CONST10_").should == false + end + + it "raises a NameError if the name contains non-alphabetic characters except '_'" do + ConstantSpecs.const_defined?("CS_CONSTX").should == false + -> { ConstantSpecs.const_defined? "Name=" }.should raise_error(NameError) + -> { ConstantSpecs.const_defined? "Name?" }.should raise_error(NameError) + end + + it "raises a TypeError if conversion to a String by calling #to_str fails" do + name = mock('123') + -> { ConstantSpecs.const_defined? name }.should raise_error(TypeError) + + name.should_receive(:to_str).and_return(123) + -> { ConstantSpecs.const_defined? name }.should raise_error(TypeError) + end +end |