require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Kernel#open" do before :each do @name = tmp("kernel_open.txt") @content = "This is a test" touch(@name) { |f| f.write @content } @file = nil end after :each do @file.close if @file rm_r @name end it "is a private method" do Kernel.should have_private_instance_method(:open) end it "opens a file when given a valid filename" do @file = open(@name) @file.should be_kind_of(File) end it "opens a file when called with a block" do open(@name, "r") { |f| f.gets }.should == @content end platform_is_not :windows do it "opens an io when path starts with a pipe" do @io = open("|date") begin @io.should be_kind_of(IO) @io.read ensure @io.close end end it "opens an io when called with a block" do @output = open("|date") { |f| f.read } @output.should_not == '' end it "opens an io for writing" do -> do bytes = open("|cat", "w") { |io| io.write(".") } bytes.should == 1 end.should output_to_fd(".") end end platform_is :windows do it "opens an io when path starts with a pipe" do @io = open("|date /t") begin @io.should be_kind_of(IO) @io.read ensure @io.close end end it "opens an io when called with a block" do @output = open("|date /t") { |f| f.read } @output.should_not == '' end end it "raises an ArgumentError if not passed one argument" do lambda { open }.should raise_error(ArgumentError) end describe "when given an object that responds to to_open" do before :each do ScratchPad.clear end it "calls #to_path to covert the argument to a String before calling #to_str" do obj = mock("open to_path") obj.should_receive(:to_path).at_least(1).times.and_return(@name) obj.should_not_receive(:to_str) open(obj, "r") { |f| f.gets }.should == @content end it "calls #to_str to convert the argument to a String" do obj = mock("open to_str") obj.should_receive(:to_str).at_least(1).times.and_return(@name) open(obj, "r") { |f| f.gets }.should == @content end it "calls #to_open on argument" do obj = mock('fileish') @file = File.open(@name) obj.should_receive(:to_open).and_return(@file) @file = open(obj) @file.should be_kind_of(File) end it "returns the value from #to_open" do obj = mock('to_open') obj.should_receive(:to_open).and_return(:value) open(obj).should == :value end it "passes its arguments onto #to_open" do obj = mock('to_open') obj.should_receive(:to_open).with(1,2,3) open(obj, 1, 2, 3) end it "passes the return value from #to_open to a block" do obj = mock('to_open') obj.should_receive(:to_open).and_return(:value) open(obj) do |mock| ScratchPad.record(mock) end ScratchPad.recorded.should == :value end end it "raises a TypeError if passed a non-String that does not respond to #to_open" do obj = mock('non-fileish') lambda { open(obj) }.should raise_error(TypeError) lambda { open(nil) }.should raise_error(TypeError) lambda { open(7) }.should raise_error(TypeError) end it "accepts nil for mode and permission" do open(@name, nil, nil) { |f| f.gets }.should == @content end end describe "Kernel.open" do it "needs to be reviewed for spec completeness" end