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require File.expand_path('../../../spec_helper', __FILE__)
with_feature :encoding do
describe "String#chr" do
it "returns a copy of self" do
s = 'e'
s.object_id.should_not == s.chr.object_id
end
it "returns a String" do
'glark'.chr.should be_an_instance_of(String)
end
it "returns an empty String if self is an empty String" do
"".chr.should == ""
end
it "returns a 1-character String" do
"glark".chr.size.should == 1
end
it "returns the character at the start of the String" do
"Goodbye, world".chr.should == "G"
end
it "returns a String in the same encoding as self" do
"\x24".encode(Encoding::US_ASCII).chr.encoding.should == Encoding::US_ASCII
end
it "understands multi-byte characters" do
s = "\u{9879}"
s.bytesize.should == 3
s.chr.should == s
end
it "understands Strings that contain a mixture of character widths" do
three = "\u{8082}"
three.bytesize.should == 3
four = "\u{77082}"
four.bytesize.should == 4
"#{three}#{four}".chr.should == three
end
end
end
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