2018-03-04 10:09:32 -05:00
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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2017-05-07 08:04:49 -04:00
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describe "StringIO#readline when passed [separator]" do
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before :each do
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@io = StringIO.new("this>is>an>example")
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end
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2017-10-28 11:15:48 -04:00
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it "returns the data read till the next occurrence of the passed separator" do
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2017-05-07 08:04:49 -04:00
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@io.readline(">").should == "this>"
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@io.readline(">").should == "is>"
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@io.readline(">").should == "an>"
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@io.readline(">").should == "example"
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end
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it "sets $_ to the read content" do
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@io.readline(">")
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$_.should == "this>"
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@io.readline(">")
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$_.should == "is>"
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@io.readline(">")
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$_.should == "an>"
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@io.readline(">")
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$_.should == "example"
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end
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it "updates self's lineno by one" do
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@io.readline(">")
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@io.lineno.should eql(1)
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@io.readline(">")
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@io.lineno.should eql(2)
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@io.readline(">")
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@io.lineno.should eql(3)
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end
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it "returns the next paragraph when the passed separator is an empty String" do
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io = StringIO.new("this is\n\nan example")
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io.readline("").should == "this is\n\n"
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io.readline("").should == "an example"
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end
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it "returns the remaining content starting at the current position when passed nil" do
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io = StringIO.new("this is\n\nan example")
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io.pos = 5
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io.readline(nil).should == "is\n\nan example"
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end
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it "tries to convert the passed separator to a String using #to_str" do
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obj = mock('to_str')
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obj.should_receive(:to_str).and_return(">")
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@io.readline(obj).should == "this>"
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end
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end
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describe "StringIO#readline when passed no argument" do
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before :each do
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@io = StringIO.new("this is\nan example\nfor StringIO#readline")
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end
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2017-10-28 11:15:48 -04:00
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it "returns the data read till the next occurrence of $/ or till eof" do
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2017-05-07 08:04:49 -04:00
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@io.readline.should == "this is\n"
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begin
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old_sep, $/ = $/, " "
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@io.readline.should == "an "
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@io.readline.should == "example\nfor "
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@io.readline.should == "StringIO#readline"
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ensure
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$/ = old_sep
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end
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end
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it "sets $_ to the read content" do
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@io.readline
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$_.should == "this is\n"
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@io.readline
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$_.should == "an example\n"
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@io.readline
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$_.should == "for StringIO#readline"
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end
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it "updates self's position" do
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@io.readline
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@io.pos.should eql(8)
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@io.readline
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@io.pos.should eql(19)
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@io.readline
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@io.pos.should eql(40)
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end
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it "updates self's lineno" do
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@io.readline
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@io.lineno.should eql(1)
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@io.readline
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@io.lineno.should eql(2)
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@io.readline
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@io.lineno.should eql(3)
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end
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it "raises an IOError if self is at the end" do
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@io.pos = 40
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lambda { @io.readline }.should raise_error(IOError)
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end
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end
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describe "StringIO#readline when in write-only mode" do
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it "raises an IOError" do
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io = StringIO.new("xyz", "w")
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lambda { io.readline }.should raise_error(IOError)
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io = StringIO.new("xyz")
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io.close_read
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lambda { io.readline }.should raise_error(IOError)
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end
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end
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2017-10-28 11:15:48 -04:00
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ruby_version_is "2.4" do
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describe "StringIO#readline when passed [chomp]" do
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it "returns the data read without a trailing newline character" do
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io = StringIO.new("this>is>an>example\n")
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io.readline(chomp: true).should == "this>is>an>example"
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end
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end
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end
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