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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Binding#local_variable_set" do
it "adds nonexistent variables to the binding's eval scope" do
obj = BindingSpecs::Demo.new(1)
bind = obj.get_empty_binding
bind.eval('local_variables').should == []
bind.local_variable_set :foo, 1
bind.eval('local_variables').should == [:foo]
bind.eval('foo').should == 1
end
it 'sets a new local variable' do
bind = binding
bind.local_variable_set(:number, 10)
bind.local_variable_get(:number).should == 10
end
it 'sets a local variable using a String as the variable name' do
bind = binding
bind.local_variable_set('number', 10)
bind.local_variable_get('number').should == 10
end
it 'sets a local variable using an object responding to #to_str as the variable name' do
bind = binding
name = mock(:obj)
name.stub!(:to_str).and_return('number')
bind.local_variable_set(name, 10)
bind.local_variable_get(name).should == 10
end
it 'scopes new local variables to the receiving Binding' do
bind = binding
bind.local_variable_set(:number, 10)
-> { number }.should raise_error(NameError)
end
it 'overwrites an existing local variable defined before a Binding' do
number = 10
bind = binding
bind.local_variable_set(:number, 20)
number.should == 20
end
it 'overwrites a local variable defined using eval()' do
bind = binding
bind.eval('number = 10')
bind.local_variable_set(:number, 20)
bind.local_variable_get(:number).should == 20
end
it "raises a NameError on global access" do
bind = binding
-> { bind.local_variable_set(:$0, "") }.should raise_error(NameError)
end
it "raises a NameError on special variable access" do
bind = binding
-> { bind.local_variable_set(:$~, "") }.should raise_error(NameError)
-> { bind.local_variable_set(:$_, "") }.should raise_error(NameError)
end
end
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