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# encoding: utf-8
describe :strscan_pos, :shared => true do
before :each do
@s = StringScanner.new("This is a test")
@m = StringScanner.new("cölorfül")
end
it "returns the position of the scan pointer" do
@s.send(@method).should == 0
@s.scan_until /This is/
@s.send(@method).should == 7
@s.get_byte
@s.send(@method).should == 8
@s.terminate
@s.send(@method).should == 14
end
it "returns the position of the scan pointer for multibyte string" do
@m.send(@method).should == 0
@m.scan_until /cö/
@m.send(@method).should == 3
@m.get_byte
@m.send(@method).should == 4
@m.terminate
@m.send(@method).should == 10
end
it "returns 0 in the reset position" do
@s.reset
@s.send(@method).should == 0
end
it "returns the length of the string in the terminate position" do
@s.terminate
@s.send(@method).should == @s.string.length
end
it "returns the `bytesize` for multibyte string in the terminate position" do
@m.terminate
@m.send(@method).should == @m.string.bytesize
@m.send(@method).should >= @m.string.length
end
end
describe :strscan_pos_set, :shared => true do
before :each do
@s = StringScanner.new("This is a test")
@m = StringScanner.new("cölorfül")
end
it "modify the scan pointer" do
@s.send(@method, 5)
@s.rest.should == "is a test"
end
it "can poin position that greater than string length for multibyte string" do
@m.send(@method, 9)
@m.rest.should == "l"
end
it "positions from the end if the argument is negative" do
@s.send(@method, -2)
@s.rest.should == "st"
@s.pos.should == 12
end
it "positions from the end if the argument is negative for multibyte string" do
@m.send(@method, -3)
@m.rest.should == "ül"
@m.pos.should == 7
end
it "raises a RangeError if position too far backward" do
lambda {
@s.send(@method, -20)
}.should raise_error(RangeError)
end
it "raises a RangeError when the passed argument is out of range" do
lambda { @s.send(@method, 20) }.should raise_error(RangeError)
end
end
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