1 files changed, 71 insertions, 0 deletions
diff --git a/spec/ruby/core/binding/local_variable_set_spec.rb b/spec/ruby/core/binding/local_variable_set_spec.rb
new file mode 100644
index 0000000000..067dcbd03e
--- /dev/null
+++ b/spec/ruby/core/binding/local_variable_set_spec.rb
@@ -0,0 +1,71 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+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)
+
+    lambda { 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
+    lambda { bind.local_variable_set(:$0, "") }.should raise_error(NameError)
+  end
+
+  it "raises a NameError on special variable access" do
+    bind = binding
+    lambda { bind.local_variable_set(:$~, "") }.should raise_error(NameError)
+    lambda { bind.local_variable_set(:$_, "") }.should raise_error(NameError)
+  end
+
+end