diff options
Diffstat (limited to 'spec/ruby/core/kernel/remove_instance_variable_spec.rb')
-rw-r--r-- | spec/ruby/core/kernel/remove_instance_variable_spec.rb | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/remove_instance_variable_spec.rb b/spec/ruby/core/kernel/remove_instance_variable_spec.rb new file mode 100644 index 0000000000..6a9f78b9bc --- /dev/null +++ b/spec/ruby/core/kernel/remove_instance_variable_spec.rb @@ -0,0 +1,59 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe :kernel_remove_instance_variable, shared: true do + it "returns the instance variable's value" do + value = @instance.send :remove_instance_variable, @object + value.should == "hello" + end + + it "removes the instance variable" do + @instance.send :remove_instance_variable, @object + @instance.instance_variable_defined?(@object).should be_false + end +end + +describe "Kernel#remove_instance_variable" do + before do + @instance = KernelSpecs::InstanceVariable.new + end + + it "is a public method" do + Kernel.should have_public_instance_method(:remove_instance_variable, false) + end + + it "raises a NameError if the instance variable is not defined" do + lambda do + @instance.send :remove_instance_variable, :@unknown + end.should raise_error(NameError) + end + + it "raises a NameError if the argument is not a valid instance variable name" do + lambda do + @instance.send :remove_instance_variable, :"@0" + end.should raise_error(NameError) + end + + it "raises a TypeError if passed an Object not defining #to_str" do + lambda do + obj = mock("kernel remove_instance_variable") + @instance.send :remove_instance_variable, obj + end.should raise_error(TypeError) + end + + describe "when passed a String" do + it_behaves_like :kernel_remove_instance_variable, nil, "@greeting" + end + + describe "when passed a Symbol" do + it_behaves_like :kernel_remove_instance_variable, nil, :@greeting + end + + describe "when passed an Object" do + it "calls #to_str to convert the argument" do + name = mock("kernel remove_instance_variable") + name.should_receive(:to_str).and_return("@greeting") + @instance.send :remove_instance_variable, name + end + end +end |