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describe :stringio_each_byte, shared: true do
before :each do
@io = StringIO.new("xyz")
end
it "yields each character code in turn" do
seen = []
@io.send(@method) { |b| seen << b }
seen.should == [120, 121, 122]
end
it "updates the position before each yield" do
seen = []
@io.send(@method) { |b| seen << @io.pos }
seen.should == [1, 2, 3]
end
it "does not yield if the current position is out of bounds" do
@io.pos = 1000
seen = nil
@io.send(@method) { |b| seen = b }
seen.should be_nil
end
it "returns self" do
@io.send(@method) {}.should equal(@io)
end
it "returns an Enumerator when passed no block" do
enum = @io.send(@method)
enum.instance_of?(Enumerator).should be_true
seen = []
enum.each { |b| seen << b }
seen.should == [120, 121, 122]
end
end
describe :stringio_each_byte_not_readable, shared: true do
it "raises an IOError" do
io = StringIO.new("xyz", "w")
-> { io.send(@method) { |b| b } }.should raise_error(IOError)
io = StringIO.new("xyz")
io.close_read
-> { io.send(@method) { |b| b } }.should raise_error(IOError)
end
end
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