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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../../../fixtures/constants', __FILE__)
describe "Module#const_get" do
it "accepts a String or Symbol name" do
Object.const_get(:CS_CONST1).should == :const1
Object.const_get("CS_CONST1").should == :const1
end
it "raises a NameError if no constant is defined in the search path" do
lambda { ConstantSpecs.const_get :CS_CONSTX }.should raise_error(NameError)
end
it "raises a NameError if the name does not start with a capital letter" do
lambda { ConstantSpecs.const_get "name" }.should raise_error(NameError)
end
it "raises a NameError if the name starts with a non-alphabetic character" do
lambda { ConstantSpecs.const_get "__CONSTX__" }.should raise_error(NameError)
lambda { ConstantSpecs.const_get "@Name" }.should raise_error(NameError)
lambda { ConstantSpecs.const_get "!Name" }.should raise_error(NameError)
lambda { ConstantSpecs.const_get "::Name" }.should raise_error(NameError)
end
it "raises a NameError if the name contains non-alphabetic characters except '_'" do
Object.const_get("CS_CONST1").should == :const1
lambda { ConstantSpecs.const_get "Name=" }.should raise_error(NameError)
lambda { ConstantSpecs.const_get "Name?" }.should raise_error(NameError)
end
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_get(name).should == ConstantSpecs::ClassA
end
it "raises a TypeError if conversion to a String by calling #to_str fails" do
name = mock('123')
lambda { ConstantSpecs.const_get(name) }.should raise_error(TypeError)
name.should_receive(:to_str).and_return(123)
lambda { ConstantSpecs.const_get(name) }.should raise_error(TypeError)
end
it "calls #const_missing on the receiver if unable to locate the constant" do
ConstantSpecs::ContainerA.should_receive(:const_missing).with(:CS_CONSTX)
ConstantSpecs::ContainerA.const_get(:CS_CONSTX)
end
it "does not search the singleton class of a Class or Module" do
lambda do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST14)
end.should raise_error(NameError)
lambda { ConstantSpecs.const_get(:CS_CONST14) }.should raise_error(NameError)
end
it "does not search the containing scope" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST20).should == :const20_2
lambda do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST5)
end.should raise_error(NameError)
end
ruby_version_is "1.9" do
it "raises a NameError if the constant is defined in the receiver's supperclass and the inherit flag is false" do
lambda do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST4, false)
end.should raise_error(NameError)
end
it "searches into the receiver superclasses if the inherit flag is true" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST4, true).should == :const4
end
it "raises a NameError when the receiver is a Module, the constant is defined at toplevel and the inherit flag is false" do
lambda do
ConstantSpecs::ModuleA.const_get(:CS_CONST1, false)
end.should raise_error(NameError)
end
it "raises a NameError when the receiver is a Class, the constant is defined at toplevel and the inherit flag is false" do
lambda do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST1, false)
end.should raise_error(NameError)
end
end
describe "with statically assigned constants" do
it "searches the immediate class or module first" do
ConstantSpecs::ClassA.const_get(:CS_CONST10).should == :const10_10
ConstantSpecs::ModuleA.const_get(:CS_CONST10).should == :const10_1
ConstantSpecs::ParentA.const_get(:CS_CONST10).should == :const10_5
ConstantSpecs::ContainerA.const_get(:CS_CONST10).should == :const10_2
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST10).should == :const10_3
end
it "searches a module included in the immediate class before the superclass" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST15).should == :const15_1
end
it "searches the superclass before a module included in the superclass" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST11).should == :const11_1
end
it "searches a module included in the superclass" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST12).should == :const12_1
end
it "searches the superclass chain" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST13).should == :const13
end
it "returns a toplevel constant when the receiver is a Class" do
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST1).should == :const1
end
it "returns a toplevel constant when the receiver is a Module" do
ConstantSpecs.const_get(:CS_CONST1).should == :const1
ConstantSpecs::ModuleA.const_get(:CS_CONST1).should == :const1
end
end
describe "with dynamically assigned constants" do
it "searches the immediate class or module first" do
ConstantSpecs::ClassA::CS_CONST301 = :const301_1
ConstantSpecs::ClassA.const_get(:CS_CONST301).should == :const301_1
ConstantSpecs::ModuleA::CS_CONST301 = :const301_2
ConstantSpecs::ModuleA.const_get(:CS_CONST301).should == :const301_2
ConstantSpecs::ParentA::CS_CONST301 = :const301_3
ConstantSpecs::ParentA.const_get(:CS_CONST301).should == :const301_3
ConstantSpecs::ContainerA::ChildA::CS_CONST301 = :const301_5
ConstantSpecs::ContainerA::ChildA.const_get(:CS_CONST301).should == :const301_5
end
it "searches a module included in the immediate class before the superclass" do
ConstantSpecs::ParentB::CS_CONST302 = :const302_1
ConstantSpecs::ModuleF::CS_CONST302 = :const302_2
ConstantSpecs::ContainerB::ChildB.const_get(:CS_CONST302).should == :const302_2
end
it "searches the superclass before a module included in the superclass" do
ConstantSpecs::ModuleE::CS_CONST303 = :const303_1
ConstantSpecs::ParentB::CS_CONST303 = :const303_2
ConstantSpecs::ContainerB::ChildB.const_get(:CS_CONST303).should == :const303_2
end
it "searches a module included in the superclass" do
ConstantSpecs::ModuleA::CS_CONST304 = :const304_1
ConstantSpecs::ModuleE::CS_CONST304 = :const304_2
ConstantSpecs::ContainerB::ChildB.const_get(:CS_CONST304).should == :const304_2
end
it "searches the superclass chain" do
ConstantSpecs::ModuleA::CS_CONST305 = :const305
ConstantSpecs::ContainerB::ChildB.const_get(:CS_CONST305).should == :const305
end
it "returns a toplevel constant when the receiver is a Class" do
Object::CS_CONST306 = :const306
ConstantSpecs::ContainerB::ChildB.const_get(:CS_CONST306).should == :const306
end
it "returns a toplevel constant when the receiver is a Module" do
Object::CS_CONST308 = :const308
ConstantSpecs.const_get(:CS_CONST308).should == :const308
ConstantSpecs::ModuleA.const_get(:CS_CONST308).should == :const308
end
it "returns the updated value of a constant" do
ConstantSpecs::ClassB::CS_CONST309 = :const309_1
ConstantSpecs::ClassB.const_get(:CS_CONST309).should == :const309_1
ConstantSpecs::ClassB::CS_CONST309 = :const309_2
ConstantSpecs::ClassB.const_get(:CS_CONST309).should == :const309_2
end
end
end
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