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require File.expand_path('../../../spec_helper', __FILE__)
require "stringio"
describe "StringIO#gets when passed [separator]" do
before :each do
@io = StringIO.new("this>is>an>example")
end
it "returns the data read till the next occurrence of the passed separator" do
@io.gets(">").should == "this>"
@io.gets(">").should == "is>"
@io.gets(">").should == "an>"
@io.gets(">").should == "example"
end
it "sets $_ to the read content" do
@io.gets(">")
$_.should == "this>"
@io.gets(">")
$_.should == "is>"
@io.gets(">")
$_.should == "an>"
@io.gets(">")
$_.should == "example"
@io.gets(">")
$_.should be_nil
end
it "accepts string as separator" do
@io.gets("is>")
$_.should == "this>"
@io.gets("an>")
$_.should == "is>an>"
@io.gets("example")
$_.should == "example"
@io.gets("ple")
$_.should be_nil
end
it "updates self's lineno by one" do
@io.gets(">")
@io.lineno.should eql(1)
@io.gets(">")
@io.lineno.should eql(2)
@io.gets(">")
@io.lineno.should eql(3)
end
it "returns the next paragraph when the passed separator is an empty String" do
io = StringIO.new("this is\n\nan example")
io.gets("").should == "this is\n\n"
io.gets("").should == "an example"
end
it "returns the remaining content starting at the current position when passed nil" do
io = StringIO.new("this is\n\nan example")
io.pos = 5
io.gets(nil).should == "is\n\nan example"
end
it "tries to convert the passed separator to a String using #to_str" do
obj = mock('to_str')
obj.should_receive(:to_str).and_return(">")
@io.gets(obj).should == "this>"
end
end
describe "StringIO#gets when passed no argument" do
before :each do
@io = StringIO.new("this is\nan example\nfor StringIO#gets")
end
it "returns the data read till the next occurrence of $/ or till eof" do
@io.gets.should == "this is\n"
begin
old_sep, $/ = $/, " "
@io.gets.should == "an "
@io.gets.should == "example\nfor "
@io.gets.should == "StringIO#gets"
ensure
$/ = old_sep
end
end
it "sets $_ to the read content" do
@io.gets
$_.should == "this is\n"
@io.gets
$_.should == "an example\n"
@io.gets
$_.should == "for StringIO#gets"
@io.gets
$_.should be_nil
end
it "updates self's position" do
@io.gets
@io.pos.should eql(8)
@io.gets
@io.pos.should eql(19)
@io.gets
@io.pos.should eql(36)
end
it "updates self's lineno" do
@io.gets
@io.lineno.should eql(1)
@io.gets
@io.lineno.should eql(2)
@io.gets
@io.lineno.should eql(3)
end
it "returns nil if self is at the end" do
@io.pos = 36
@io.gets.should be_nil
@io.gets.should be_nil
end
end
describe "StringIO#gets when passed [limit]" do
before :each do
@io = StringIO.new("this>is>an>example")
end
it "returns the data read until the limit is met" do
@io.gets(4).should == "this"
@io.gets(3).should == ">is"
@io.gets(5).should == ">an>e"
@io.gets(6).should == "xample"
end
it "sets $_ to the read content" do
@io.gets(4)
$_.should == "this"
@io.gets(3)
$_.should == ">is"
@io.gets(5)
$_.should == ">an>e"
@io.gets(6)
$_.should == "xample"
@io.gets(3)
$_.should be_nil
end
it "updates self's lineno by one" do
@io.gets(3)
@io.lineno.should eql(1)
@io.gets(3)
@io.lineno.should eql(2)
@io.gets(3)
@io.lineno.should eql(3)
end
it "tries to convert the passed limit to an Integer using #to_int" do
obj = mock('to_int')
obj.should_receive(:to_int).and_return(4)
@io.gets(obj).should == "this"
end
it "returns a blank string when passed a limit of 0" do
@io.gets(0).should == ""
end
end
describe "StringIO#gets when passed [separator] and [limit]" do
before :each do
@io = StringIO.new("this>is>an>example")
end
it "returns the data read until the limit is consumed or the separator is met" do
@io.gets('>', 8).should == "this>"
@io.gets('>', 2).should == "is"
@io.gets('>', 10).should == ">"
@io.gets('>', 6).should == "an>"
@io.gets('>', 5).should == "examp"
end
it "sets $_ to the read content" do
@io.gets('>', 8)
$_.should == "this>"
@io.gets('>', 2)
$_.should == "is"
@io.gets('>', 10)
$_.should == ">"
@io.gets('>', 6)
$_.should == "an>"
@io.gets('>', 5)
$_.should == "examp"
end
it "updates self's lineno by one" do
@io.gets('>', 3)
@io.lineno.should eql(1)
@io.gets('>', 3)
@io.lineno.should eql(2)
@io.gets('>', 3)
@io.lineno.should eql(3)
end
it "tries to convert the passed separator to a String using #to_str" do
obj = mock('to_str')
obj.should_receive(:to_str).and_return('>')
@io.gets(obj, 5).should == "this>"
end
it "does not raise TypeError if passed separator is nil" do
@io.gets(nil, 5).should == "this>"
end
it "tries to convert the passed limit to an Integer using #to_int" do
obj = mock('to_int')
obj.should_receive(:to_int).and_return(5)
@io.gets('>', obj).should == "this>"
end
end
describe "StringIO#gets when in write-only mode" do
it "raises an IOError" do
io = StringIO.new("xyz", "w")
lambda { io.gets }.should raise_error(IOError)
io = StringIO.new("xyz")
io.close_read
lambda { io.gets }.should raise_error(IOError)
end
end
ruby_version_is "2.4" do
describe "StringIO#gets when passed [chomp]" do
it "returns the data read without a trailing newline character" do
io = StringIO.new("this>is>an>example\n")
io.gets(chomp: true).should == "this>is>an>example"
end
end
end
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