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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "IO#lineno" do
before :each do
@io = IOSpecs.io_fixture "lines.txt"
end
after :each do
@io.close if @io
end
it "raises an IOError on a closed stream" do
-> { IOSpecs.closed_io.lineno }.should raise_error(IOError)
end
it "raises an IOError on a write-only stream" do
name = tmp("io_lineno.txt")
begin
File.open(name, 'w') do |f|
-> { f.lineno }.should raise_error(IOError)
end
ensure
rm_r name
end
end
it "raises an IOError on a duplexed stream with the read side closed" do
IO.popen('cat', 'r+') do |p|
p.close_read
-> { p.lineno }.should raise_error(IOError)
end
end
it "returns the current line number" do
@io.lineno.should == 0
count = 0
while @io.gets
@io.lineno.should == count += 1
end
@io.rewind
@io.lineno.should == 0
end
end
describe "IO#lineno=" do
before :each do
@io = IOSpecs.io_fixture "lines.txt"
end
after :each do
@io.close if @io
end
it "raises an IOError on a closed stream" do
-> { IOSpecs.closed_io.lineno = 5 }.should raise_error(IOError)
end
it "raises an IOError on a write-only stream" do
name = tmp("io_lineno.txt")
begin
File.open(name, 'w') do |f|
-> { f.lineno = 0 }.should raise_error(IOError)
end
ensure
rm_r name
end
end
it "raises an IOError on a duplexed stream with the read side closed" do
IO.popen('cat', 'r+') do |p|
p.close_read
-> { p.lineno = 0 }.should raise_error(IOError)
end
end
it "calls #to_int on a non-numeric argument" do
obj = mock('123')
obj.should_receive(:to_int).and_return(123)
@io.lineno = obj
@io.lineno.should == 123
end
it "truncates a Float argument" do
@io.lineno = 1.5
@io.lineno.should == 1
@io.lineno = 92233.72036854775808
@io.lineno.should == 92233
end
it "raises TypeError if cannot convert argument to Integer implicitly" do
-> { @io.lineno = "1" }.should raise_error(TypeError, 'no implicit conversion of String into Integer')
-> { @io.lineno = nil }.should raise_error(TypeError, 'no implicit conversion from nil to integer')
end
it "does not accept Integers that don't fit in a C int" do
-> { @io.lineno = 2**32 }.should raise_error(RangeError)
end
it "sets the current line number to the given value" do
@io.lineno = count = 500
while @io.gets
@io.lineno.should == count += 1
end
@io.rewind
@io.lineno.should == 0
end
it "does not change $." do
original_line = $.
numbers = [-2**30, -2**16, -2**8, -100, -10, -1, 0, 1, 10, 2**8, 2**16, 2**30]
numbers.each do |num|
@io.lineno = num
@io.lineno.should == num
$..should == original_line
end
end
it "does not change $. until next read" do
$. = 0
$..should == 0
@io.lineno = count = 500
$..should == 0
while @io.gets
$..should == count += 1
end
end
end
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