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82 lines
2.2 KiB
Ruby
82 lines
2.2 KiB
Ruby
# -*- encoding: utf-8 -*-
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "IO#readline" do
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before :each do
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@io = IOSpecs.io_fixture "lines.txt"
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end
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after :each do
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@io.close unless @io.closed?
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end
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it "returns the next line on the stream" do
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@io.readline.should == "Voici la ligne une.\n"
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@io.readline.should == "Qui è la linea due.\n"
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end
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it "goes back to first position after a rewind" do
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@io.readline.should == "Voici la ligne une.\n"
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@io.rewind
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@io.readline.should == "Voici la ligne une.\n"
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end
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it "returns characters after the position set by #seek" do
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@io.seek(1)
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@io.readline.should == "oici la ligne une.\n"
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end
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it "raises EOFError on end of stream" do
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IOSpecs.lines.length.times { @io.readline }
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-> { @io.readline }.should raise_error(EOFError)
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end
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it "raises IOError on closed stream" do
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-> { IOSpecs.closed_io.readline }.should raise_error(IOError)
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end
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it "assigns the returned line to $_" do
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IOSpecs.lines.each do |line|
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@io.readline
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$_.should == line
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end
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end
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describe "when passed limit" do
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it "reads limit bytes" do
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@io.readline(3).should == "Voi"
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end
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it "returns an empty string when passed 0 as a limit" do
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@io.readline(0).should == ""
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end
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end
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describe "when passed separator and limit" do
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it "reads limit bytes till the separator" do
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# Voici la ligne une.\
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@io.readline(" ", 4).should == "Voic"
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@io.readline(" ", 4).should == "i "
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@io.readline(" ", 4).should == "la "
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@io.readline(" ", 4).should == "lign"
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@io.readline(" ", 4).should == "e "
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end
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end
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describe "when passed chomp" do
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it "returns the first line without a trailing newline character" do
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@io.readline(chomp: true).should == IOSpecs.lines_without_newline_characters[0]
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end
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ruby_version_is "3.0" do
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it "raises exception when options passed as Hash" do
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-> { @io.readline({ chomp: true }) }.should raise_error(TypeError)
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-> {
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@io.readline("\n", 1, { chomp: true })
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}.should raise_error(ArgumentError, "wrong number of arguments (given 3, expected 0..2)")
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end
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end
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end
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end
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