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require File.expand_path('../../fixtures/classes', __FILE__)
describe :io_write, :shared => true do
before :each do
@filename = tmp("IO_syswrite_file") + $$.to_s
File.open(@filename, "w") do |file|
file.send(@method, "012345678901234567890123456789")
end
@file = File.open(@filename, "r+")
@readonly_file = File.open(@filename)
end
after :each do
@file.close
@readonly_file.close
rm_r @filename
end
it "coerces the argument to a string using to_s" do
(obj = mock('test')).should_receive(:to_s).and_return('a string')
@file.send(@method, obj)
end
it "checks if the file is writable if writing more than zero bytes" do
lambda { @readonly_file.send(@method, "abcde") }.should raise_error(IOError)
end
it "returns the number of bytes written" do
written = @file.send(@method, "abcde")
written.should == 5
end
it "invokes to_s on non-String argument" do
data = "abcdefgh9876"
(obj = mock(data)).should_receive(:to_s).and_return(data)
@file.send(@method, obj)
@file.seek(0)
@file.read(data.size).should == data
end
it "writes all of the string's bytes without buffering if mode is sync" do
@file.sync = true
written = @file.send(@method, "abcde")
written.should == 5
File.open(@filename) do |file|
file.read(10).should == "abcde56789"
end
end
it "does not warn if called after IO#read" do
@file.read(5)
lambda { @file.send(@method, "fghij") }.should_not complain
end
it "writes to the current position after IO#read" do
@file.read(5)
@file.send(@method, "abcd")
@file.rewind
@file.read.should == "01234abcd901234567890123456789"
end
it "advances the file position by the count of given bytes" do
@file.send(@method, "abcde")
@file.read(10).should == "5678901234"
end
it "raises IOError on closed stream" do
lambda { IOSpecs.closed_io.send(@method, "hello") }.should raise_error(IOError)
end
end
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