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describe :string_codepoints, :shared => true do
it "raises an ArgumentError when self has an invalid encoding and a method is called on the returned Enumerator" do
s = "\xDF".force_encoding(Encoding::UTF_8)
s.valid_encoding?.should be_false
lambda { s.send(@method).to_a }.should raise_error(ArgumentError)
end
it "yields each codepoint to the block if one is given" do
codepoints = []
"abcd".send(@method) do |codepoint|
codepoints << codepoint
end
codepoints.should == [97, 98, 99, 100]
end
it "raises an ArgumentError if self's encoding is invalid and a block is given" do
s = "\xDF".force_encoding(Encoding::UTF_8)
s.valid_encoding?.should be_false
lambda { s.send(@method) { } }.should raise_error(ArgumentError)
end
it "returns codepoints as Fixnums" do
"glark\u{20}".send(@method).to_a.each do |codepoint|
codepoint.should be_an_instance_of(Fixnum)
end
end
it "returns one codepoint for each character" do
s = "\u{9876}\u{28}\u{1987}"
s.send(@method).to_a.size.should == s.chars.to_a.size
end
it "works for multibyte characters" do
s = "\u{9819}"
s.bytesize.should == 3
s.send(@method).to_a.should == [38937]
end
it "returns the codepoint corresponding to the character's position in the String's encoding" do
"\u{787}".send(@method).to_a.should == [1927]
end
it "round-trips to the original String using Integer#chr" do
s = "\u{13}\u{7711}\u{1010}"
s2 = ""
s.send(@method) {|n| s2 << n.chr(Encoding::UTF_8)}
s.should == s2
end
it "is synonomous with #bytes for Strings which are single-byte optimisable" do
s = "(){}".encode('ascii')
s.ascii_only?.should be_true
s.send(@method).to_a.should == s.bytes.to_a
end
end
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