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require "spec"
require "../spec_helper"
describe "IO::MultiWriter" do
describe "#write" do
it "writes to multiple IOs" do
io1 = IO::Memory.new
io2 = IO::Memory.new
writer = IO::MultiWriter.new(io1, io2)
writer.puts "foo bar"
io1.to_s.should eq("foo bar\n")
io2.to_s.should eq("foo bar\n")
end
end
describe "#read" do
it "raises" do
writer = IO::MultiWriter.new(Array(IO).new)
expect_raises(IO::Error, "Can't read from IO::MultiWriter") do
writer.read_byte
end
end
end
describe "#close" do
it "stops reading" do
io = IO::Memory.new
writer = IO::MultiWriter.new(io)
writer.close
expect_raises(IO::Error, "Closed") do
writer.puts "foo"
end
io.closed?.should eq(false)
io.to_s.should eq("")
end
it "closes the underlying stream if sync_close is true" do
io = IO::Memory.new
writer = IO::MultiWriter.new(io, sync_close: true)
writer.close
io.closed?.should eq(true)
end
end
describe "#flush" do
it "writes to IO and File" do
with_tempfile("multiple_writer_spec") do |path|
io = IO::Memory.new
File.open(path, "w") do |file|
writer = IO::MultiWriter.new(io, file)
writer.puts "foo bar"
writer.flush
end
io.to_s.should eq("foo bar\n")
File.read(path).should eq("foo bar\n")
end
end
end
end
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