describe :stringio_each_separator, shared: true do before :each do @io = StringIO.new("a b c d e\n1 2 3 4 5") end it "uses the passed argument as the line separator" do seen = [] @io.send(@method, " ") {|s| seen << s} seen.should == ["a ", "b ", "c ", "d ", "e\n1 ", "2 ", "3 ", "4 ", "5"] end it "does not change $_" do $_ = "test" @io.send(@method, " ") { |s| s} $_.should == "test" end it "returns self" do @io.send(@method) {|l| l }.should equal(@io) 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(" ") seen = [] @io.send(@method, obj) { |l| seen << l } seen.should == ["a ", "b ", "c ", "d ", "e\n1 ", "2 ", "3 ", "4 ", "5"] end it "yields self's content starting from the current position when the passed separator is nil" do seen = [] io = StringIO.new("1 2 1 2 1 2") io.pos = 2 io.send(@method, nil) {|s| seen << s} seen.should == ["2 1 2 1 2"] end it "yields each paragraph when passed an empty String as separator" do seen = [] io = StringIO.new("para1\n\npara2\n\n\npara3") io.send(@method, "") {|s| seen << s} seen.should == ["para1\n\n", "para2\n\n", "para3"] end end describe :stringio_each_no_arguments, shared: true do before :each do @io = StringIO.new("a b c d e\n1 2 3 4 5") end it "yields each line to the passed block" do seen = [] @io.send(@method) {|s| seen << s } seen.should == ["a b c d e\n", "1 2 3 4 5"] end it "yields each line starting from the current position" do seen = [] @io.pos = 4 @io.send(@method) {|s| seen << s } seen.should == ["c d e\n", "1 2 3 4 5"] end it "does not change $_" do $_ = "test" @io.send(@method) { |s| s} $_.should == "test" end it "uses $/ as the default line separator" do seen = [] begin old_rs, $/ = $/, " " @io.send(@method) {|s| seen << s } seen.should eql(["a ", "b ", "c ", "d ", "e\n1 ", "2 ", "3 ", "4 ", "5"]) ensure $/ = old_rs end end it "returns self" do @io.send(@method) {|l| l }.should equal(@io) end it "returns an Enumerator when passed no block" do enum = @io.send(@method) enum.instance_of?(Enumerator).should be_true seen = [] enum.each { |b| seen << b } seen.should == ["a b c d e\n", "1 2 3 4 5"] end end describe :stringio_each_not_readable, shared: true do it "raises an IOError" do io = StringIO.new("a b c d e", "w") lambda { io.send(@method) { |b| b } }.should raise_error(IOError) io = StringIO.new("a b c d e") io.close_read lambda { io.send(@method) { |b| b } }.should raise_error(IOError) end end