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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO#eof?" do
before :each do
@name = tmp("empty.txt")
touch @name
end
after :each do
rm_r @name
end
it "returns true on an empty stream that has just been opened" do
File.open(@name) { |empty| empty.eof?.should == true }
end
it "raises IOError on stream not opened for reading" do
lambda do
File.open(@name, "w") { |f| f.eof? }
end.should raise_error(IOError)
end
end
describe "IO#eof?" do
before :each do
@name = fixture __FILE__, "lines.txt"
@io = IOSpecs.io_fixture "lines.txt"
end
after :each do
@io.close if @io && !@io.closed?
end
it "returns false when not at end of file" do
@io.read 1
@io.eof?.should == false
end
it "returns true after reading with read with no parameters" do
@io.read()
@io.eof?.should == true
end
it "returns true after reading with read" do
@io.read(File.size(@name))
@io.eof?.should == true
end
it "returns true after reading with sysread" do
@io.sysread(File.size(@name))
@io.eof?.should == true
end
it "returns true after reading with readlines" do
@io.readlines
@io.eof?.should == true
end
it "returns false on just opened non-empty stream" do
@io.eof?.should == false
end
it "does not consume the data from the stream" do
@io.eof?.should == false
@io.getc.should == 'V'
end
it "raises IOError on closed stream" do
lambda { IOSpecs.closed_io.eof? }.should raise_error(IOError)
end
it "raises IOError on stream closed for reading by close_read" do
@io.close_read
lambda { @io.eof? }.should raise_error(IOError)
end
it "returns true on one-byte stream after single-byte read" do
File.open(File.dirname(__FILE__) + '/fixtures/one_byte.txt') { |one_byte|
one_byte.read(1)
one_byte.eof?.should == true
}
end
end
describe "IO#eof?" do
after :each do
@r.close if @r && !@r.closed?
@w.close if @w && !@w.closed?
end
it "returns true on receiving side of Pipe when writing side is closed" do
@r, @w = IO.pipe
@w.close
@r.eof?.should == true
end
it "returns false on receiving side of Pipe when writing side wrote some data" do
@r, @w = IO.pipe
@w.puts "hello"
@r.eof?.should == false
@w.close
@r.eof?.should == false
@r.read
@r.eof?.should == true
end
end
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