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# -*- encoding: utf-8 -*-
describe :stringio_codepoints, shared: true do
before :each do
@io = StringIO.new("∂φ/∂x = gaîté")
@enum = @io.send(@method)
end
it "returns an Enumerator" do
@enum.should be_an_instance_of(Enumerator)
end
it "yields each codepoint code in turn" do
@enum.to_a.should == [8706, 966, 47, 8706, 120, 32, 61, 32, 103, 97, 238, 116, 233]
end
it "yields each codepoint starting from the current position" do
@io.pos = 15
@enum.to_a.should == [238, 116, 233]
end
it "raises an error if reading invalid sequence" do
@io.pos = 1 # inside of a multibyte sequence
-> { @enum.first }.should raise_error(ArgumentError)
end
it "raises an IOError if not readable" do
@io.close_read
-> { @enum.to_a }.should raise_error(IOError)
io = StringIO.new(+"xyz", "w")
-> { io.send(@method).to_a }.should raise_error(IOError)
end
it "calls the given block" do
r = []
@io.send(@method){|c| r << c }
r.should == [8706, 966, 47, 8706, 120, 32, 61, 32, 103, 97, 238, 116, 233]
end
it "returns self" do
@io.send(@method) {|l| l }.should equal(@io)
end
end
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