require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "StringIO#<< when passed [Object]" do before :each do @io = StringIO.new("example") end it "returns self" do (@io << "just testing").should equal(@io) end it "writes the passed argument onto self" do (@io << "just testing") @io.string.should == "just testing" (@io << " and more testing") @io.string.should == "just testing and more testing" end it "writes the passed argument at the current position" do @io.pos = 5 @io << "" @io.string.should == "examp" end it "pads self with \\000 when the current position is after the end" do @io.pos = 15 @io << "just testing" @io.string.should == "example\000\000\000\000\000\000\000\000just testing" end ruby_version_is ""..."2.7" do it "taints self's String when the passed argument is tainted" do (@io << "test".taint) @io.string.tainted?.should be_true end end ruby_version_is ""..."2.8" do it "does not taint self when the passed argument is tainted" do (@io << "test".taint) @io.tainted?.should be_false end end it "updates self's position" do @io << "test" @io.pos.should eql(4) end it "tries to convert the passed argument to a String using #to_s" do obj = mock("to_s") obj.should_receive(:to_s).and_return("Test") (@io << obj).string.should == "Testple" end end describe "StringIO#<< when self is not writable" do it "raises an IOError" do io = StringIO.new("test", "r") -> { io << "test" }.should raise_error(IOError) io = StringIO.new("test") io.close_write -> { io << "test" }.should raise_error(IOError) end end describe "StringIO#<< when in append mode" do before :each do @io = StringIO.new("example", "a") end it "appends the passed argument to the end of self, ignoring current position" do (@io << ", just testing") @io.string.should == "example, just testing" @io.pos = 3 (@io << " and more testing") @io.string.should == "example, just testing and more testing" end it "correctly updates self's position" do @io << ", testing" @io.pos.should eql(16) end end