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Diffstat (limited to 'spec/ruby/core/string/dup_spec.rb')
-rw-r--r-- | spec/ruby/core/string/dup_spec.rb | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/spec/ruby/core/string/dup_spec.rb b/spec/ruby/core/string/dup_spec.rb new file mode 100644 index 0000000000..81fb1308cc --- /dev/null +++ b/spec/ruby/core/string/dup_spec.rb @@ -0,0 +1,52 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "String#dup" do + before :each do + ScratchPad.clear + @obj = StringSpecs::InitializeString.new "string" + end + + it "calls #initialize_copy on the new instance" do + dup = @obj.dup + ScratchPad.recorded.should_not == @obj.object_id + ScratchPad.recorded.should == dup.object_id + end + + it "copies instance variables" do + dup = @obj.dup + dup.ivar.should == 1 + end + + it "does not copy singleton methods" do + def @obj.special() :the_one end + dup = @obj.dup + lambda { dup.special }.should raise_error(NameError) + end + + it "does not copy modules included in the singleton class" do + class << @obj + include StringSpecs::StringModule + end + + dup = @obj.dup + lambda { dup.repr }.should raise_error(NameError) + end + + it "does not copy constants defined in the singleton class" do + class << @obj + CLONE = :clone + end + + dup = @obj.dup + lambda { class << dup; CLONE; end }.should raise_error(NameError) + end + + it "does not modify the original string when changing dupped string" do + orig = "string"[0..100] + dup = orig.dup + orig[0] = 'x' + orig.should == "xtring" + dup.should == "string" + end +end |