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describe :stringio_write, shared: true do
before :each do
@io = StringIO.new(+'12345')
end
it "tries to convert the passed Object to a String using #to_s" do
obj = mock("to_s")
obj.should_receive(:to_s).and_return("to_s")
@io.send(@method, obj)
@io.string.should == "to_s5"
end
end
describe :stringio_write_string, shared: true do
before :each do
@io = StringIO.new(+'12345')
end
# TODO: RDoc says that #write appends at the current position.
it "writes the passed String at the current buffer position" do
@io.pos = 2
@io.send(@method, 'x').should == 1
@io.string.should == '12x45'
@io.send(@method, 7).should == 1
@io.string.should == '12x75'
end
it "pads self with \\000 when the current position is after the end" do
@io.pos = 8
@io.send(@method, 'x')
@io.string.should == "12345\000\000\000x"
@io.send(@method, 9)
@io.string.should == "12345\000\000\000x9"
end
it "returns the number of bytes written" do
@io.send(@method, '').should == 0
@io.send(@method, nil).should == 0
str = "1" * 100
@io.send(@method, str).should == 100
end
it "updates self's position" do
@io.send(@method, 'test')
@io.pos.should eql(4)
end
it "handles concurrent writes correctly" do
@io = StringIO.new
n = 8
go = false
threads = n.times.map { |i|
Thread.new {
Thread.pass until go
@io.write i.to_s
}
}
go = true
threads.each(&:join)
@io.string.size.should == n.times.map(&:to_s).join.size
end
it "handles writing non-ASCII UTF-8 after seek" do
@io.binmode
@io << "\x80"
@io.pos = 0
@io << "\x81"
@io.string.should == "\x812345".b
end
it "handles writing with position < buffer size" do
@io.pos = 2
@io.write "abc"
@io.string.should == "12abc"
@io.pos = 2
@io.write "de"
@io.string.should == "12dec"
@io.pos = 2
@io.write "fghi"
@io.string.should == "12fghi"
end
it "transcodes the given string when the external encoding is set and neither is BINARY" do
utf8_str = "hello"
io = StringIO.new.set_encoding(Encoding::UTF_16BE)
io.external_encoding.should == Encoding::UTF_16BE
io.send(@method, utf8_str)
expected = [0, 104, 0, 101, 0, 108, 0, 108, 0, 111] # UTF-16BE bytes for "hello"
io.string.bytes.should == expected
end
it "does not transcode the given string when the external encoding is set and the string encoding is BINARY" do
str = "été".b
io = StringIO.new.set_encoding(Encoding::UTF_16BE)
io.external_encoding.should == Encoding::UTF_16BE
io.send(@method, str)
io.string.bytes.should == str.bytes
end
end
describe :stringio_write_not_writable, shared: true do
it "raises an IOError" do
io = StringIO.new(+"test", "r")
-> { io.send(@method, "test") }.should raise_error(IOError)
io = StringIO.new(+"test")
io.close_write
-> { io.send(@method, "test") }.should raise_error(IOError)
end
end
describe :stringio_write_append, shared: true do
before :each do
@io = StringIO.new(+"example", "a")
end
it "appends the passed argument to the end of self" do
@io.send(@method, ", just testing")
@io.string.should == "example, just testing"
@io.send(@method, " and more testing")
@io.string.should == "example, just testing and more testing"
end
it "correctly updates self's position" do
@io.send(@method, ", testing")
@io.pos.should eql(16)
end
end
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