require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "StringIO#print" do before :each do @io = StringIO.new('example') end it "prints $_ when passed no arguments" do $_ = nil @io.print @io.string.should == "example" $_ = "blah" @io.print @io.string.should == "blahple" end it "prints the passed arguments to self" do @io.print(5, 6, 7, 8) @io.string.should == "5678ple" end it "tries to convert the passed Object to a String using #to_s" do obj = mock("to_s") obj.should_receive(:to_s).and_return("to_s") @io.print(obj) @io.string.should == "to_sple" end it "returns nil" do @io.print(1, 2, 3).should be_nil end it "pads self with \\000 when the current position is after the end" do @io.pos = 10 @io.print(1, 2, 3) @io.string.should == "example\000\000\000123" end it "honors the output record separator global" do old_rs, $\ = $\, 'x' begin @io.print(5, 6, 7, 8) @io.string.should == '5678xle' ensure $\ = old_rs end end it "updates the current position" do @io.print(1, 2, 3) @io.pos.should eql(3) @io.print(1, 2, 3) @io.pos.should eql(6) end it "correctly updates the current position when honoring the output record separator global" do old_rs, $\ = $\, 'x' begin @io.print(5, 6, 7, 8) @io.pos.should eql(5) ensure $\ = old_rs end end end describe "StringIO#print when in append mode" do before :each do @io = StringIO.new("example", "a") end it "appends the passed argument to the end of self" do @io.print(", just testing") @io.string.should == "example, just testing" @io.print(" and more testing") @io.string.should == "example, just testing and more testing" end it "correctly updates self's position" do @io.print(", testing") @io.pos.should eql(16) end end describe "StringIO#print when self is not writable" do it "raises an IOError" do io = StringIO.new("test", "r") lambda { io.print("test") }.should raise_error(IOError) io = StringIO.new("test") io.close_write lambda { io.print("test") }.should raise_error(IOError) end end