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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "StringIO#readlines when passed [separator]" do
before :each do
@io = StringIO.new("this>is>an>example")
end
it "returns an Array containing lines based on the passed separator" do
@io.readlines(">").should == ["this>", "is>", "an>", "example"]
end
it "updates self's position based on the number of read bytes" do
@io.readlines(">")
@io.pos.should eql(18)
end
it "updates self's lineno based on the number of read lines" do
@io.readlines(">")
@io.lineno.should eql(4)
end
it "does not change $_" do
$_ = "test"
@io.readlines(">")
$_.should == "test"
end
it "returns an Array containing all paragraphs when the passed separator is an empty String" do
io = StringIO.new("this is\n\nan example")
io.readlines("").should == ["this is\n\n", "an example"]
end
it "returns the remaining content as one line starting at the current position when passed nil" do
io = StringIO.new("this is\n\nan example")
io.pos = 5
io.readlines(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.stub!(:to_str).and_return(">")
@io.readlines(obj).should == ["this>", "is>", "an>", "example"]
end
end
describe "StringIO#readlines when passed no argument" do
before :each do
@io = StringIO.new("this is\nan example\nfor StringIO#readlines")
end
it "returns an Array containing lines based on $/" do
begin
old_sep = $/;
suppress_warning {$/ = " "}
@io.readlines.should == ["this ", "is\nan ", "example\nfor ", "StringIO#readlines"]
ensure
suppress_warning {$/ = old_sep}
end
end
it "updates self's position based on the number of read bytes" do
@io.readlines
@io.pos.should eql(41)
end
it "updates self's lineno based on the number of read lines" do
@io.readlines
@io.lineno.should eql(3)
end
it "does not change $_" do
$_ = "test"
@io.readlines(">")
$_.should == "test"
end
it "returns an empty Array when self is at the end" do
@io.pos = 41
@io.readlines.should == []
end
end
describe "StringIO#readlines when in write-only mode" do
it "raises an IOError" do
io = StringIO.new("xyz", "w")
-> { io.readlines }.should raise_error(IOError)
io = StringIO.new("xyz")
io.close_read
-> { io.readlines }.should raise_error(IOError)
end
end
describe "StringIO#readlines when passed [chomp]" do
it "returns the data read without a trailing newline character" do
io = StringIO.new("this>is\nan>example\r\n")
io.readlines(chomp: true).should == ["this>is", "an>example"]
end
end
describe "StringIO#readlines when passed [limit]" do
before :each do
@io = StringIO.new("a b c d e\n1 2 3 4 5")
end
it "returns the data read until the limit is met" do
@io.readlines(4).should == ["a b ", "c d ", "e\n", "1 2 ", "3 4 ", "5"]
end
it "raises ArgumentError when limit is 0" do
-> { @io.readlines(0) }.should raise_error(ArgumentError)
end
it "ignores it when the limit is negative" do
@io.readlines(-4).should == ["a b c d e\n", "1 2 3 4 5"]
end
end
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