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# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
require File.expand_path('../shared/gets_ascii', __FILE__)
describe "IO#gets" do
it_behaves_like :io_gets_ascii, :gets
end
describe "IO#gets" do
before :each do
@io = IOSpecs.io_fixture "lines.txt"
@count = 0
end
after :each do
@io.close unless @io.closed?
end
it "assigns the returned line to $_" do
IOSpecs.lines.each do |line|
@io.gets
$_.should == line
end
end
it "returns nil if called at the end of the stream" do
IOSpecs.lines.length.times { @io.gets }
@io.gets.should == nil
end
it "raises IOError on closed stream" do
lambda { IOSpecs.closed_io.gets }.should raise_error(IOError)
end
describe "with no separator" do
it "returns the next line of string that is separated by $/" do
IOSpecs.lines.each { |line| line.should == @io.gets }
end
it "returns tainted strings" do
while line = @io.gets
line.tainted?.should == true
end
end
it "updates lineno with each invocation" do
while line = @io.gets
@io.lineno.should == @count += 1
end
end
it "updates $. with each invocation" do
while line = @io.gets
$..should == @count += 1
end
end
end
describe "with nil separator" do
it "returns the entire contents" do
@io.gets(nil).should == IOSpecs.lines.join("")
end
it "returns tainted strings" do
while line = @io.gets(nil)
line.tainted?.should == true
end
end
it "updates lineno with each invocation" do
while line = @io.gets(nil)
@io.lineno.should == @count += 1
end
end
it "updates $. with each invocation" do
while line = @io.gets(nil)
$..should == @count += 1
end
end
end
describe "with an empty String separator" do
# Two successive newlines in the input separate paragraphs.
# When there are more than two successive newlines, only two are kept.
it "returns the next paragraph" do
@io.gets("").should == IOSpecs.lines[0,3].join("")
@io.gets("").should == IOSpecs.lines[4,3].join("")
@io.gets("").should == IOSpecs.lines[7,2].join("")
end
it "reads until the beginning of the next paragraph" do
# There are three newlines between the first and second paragraph
@io.gets("")
@io.gets.should == IOSpecs.lines[4]
end
it "returns tainted strings" do
while line = @io.gets("")
line.tainted?.should == true
end
end
it "updates lineno with each invocation" do
while line = @io.gets("")
@io.lineno.should == @count += 1
end
end
it "updates $. with each invocation" do
while line = @io.gets("")
$..should == @count += 1
end
end
end
describe "with an arbitrary String separator" do
it "reads up to and including the separator" do
@io.gets("la linea").should == "Voici la ligne une.\nQui \303\250 la linea"
end
it "returns tainted strings" do
while line = @io.gets("la")
line.tainted?.should == true
end
end
it "updates lineno with each invocation" do
while (line = @io.gets("la"))
@io.lineno.should == @count += 1
end
end
it "updates $. with each invocation" do
while line = @io.gets("la")
$..should == @count += 1
end
end
end
end
describe "IO#gets" do
before :each do
@name = tmp("io_gets")
end
after :each do
rm_r @name
end
it "raises an IOError if the stream is opened for append only" do
lambda { File.open(@name, fmode("a:utf-8")) { |f| f.gets } }.should raise_error(IOError)
end
it "raises an IOError if the stream is opened for writing only" do
lambda { File.open(@name, fmode("w:utf-8")) { |f| f.gets } }.should raise_error(IOError)
end
end
ruby_version_is "1.9" do
describe "IO#gets" do
before :each do
@name = tmp("io_gets")
touch(@name) { |f| f.write "one\n\ntwo\n\nthree\nfour\n" }
@io = new_io @name, fmode("r:utf-8")
end
after :each do
@io.close
rm_r @name
end
it "calls #to_int to convert a single object argument to an Integer limit" do
obj = mock("io gets limit")
obj.should_receive(:to_int).and_return(6)
@io.gets(obj).should == "one\n"
end
it "calls #to_int to convert the second object argument to an Integer limit" do
obj = mock("io gets limit")
obj.should_receive(:to_int).and_return(2)
@io.gets(nil, obj).should == "on"
end
it "calls #to_str to convert the first argument to a String when passed a limit" do
obj = mock("io gets separator")
obj.should_receive(:to_str).and_return($/)
@io.gets(obj, 5).should == "one\n"
end
it "reads to the default seperator when passed a single argument greater than the number of bytes to the separator" do
@io.gets(6).should == "one\n"
end
it "reads limit bytes when passed a single argument less than the number of bytes to the default separator" do
@io.gets(3).should == "one"
end
it "reads limit bytes when passed nil and a limit" do
@io.gets(nil, 6).should == "one\n\nt"
end
it "reads until the next paragraph when passed '' and a limit greater than the next paragraph" do
@io.gets("", 6).should == "one\n\n"
end
it "reads limit bytes when passed '' and a limit less than the next paragraph" do
@io.gets("", 3).should == "one"
end
end
end
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