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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, :wasi 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
-> { open }.should raise_error(ArgumentError)
end
ruby_version_is "3.0" do
it "accepts options as keyword arguments" do
@file = open(@name, "r", 0666, flags: File::CREAT)
@file.should be_kind_of(File)
-> {
open(@name, "r", 0666, {flags: File::CREAT})
}.should raise_error(ArgumentError, "wrong number of arguments (given 4, expected 1..3)")
end
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 keyword arguments onto #to_open as keyword arguments if to_open accepts them" do
obj = Object.new
def obj.to_open(*args, **kw)
ScratchPad << {args: args, kw: kw}
end
ScratchPad.record []
open(obj, 1, 2, 3, a: "b")
ScratchPad.recorded.should == [args: [1, 2, 3], kw: {a: "b"}]
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')
-> { open(obj) }.should raise_error(TypeError)
-> { open(nil) }.should raise_error(TypeError)
-> { 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
ruby_version_is ""..."3.0" do
it "works correctly when redefined by open-uri" do
code = <<~RUBY
require 'open-uri'
obj = Object.new
def obj.to_open; self; end
p open(obj) == obj
RUBY
ruby_exe(code, args: "2>&1").should == "true\n"
end
end
ruby_version_is "3.0" do
it "is not redefined by open-uri" do
code = <<~RUBY
before = Kernel.instance_method(:open)
require 'open-uri'
after = Kernel.instance_method(:open)
p before == after
RUBY
ruby_exe(code, args: "2>&1").should == "true\n"
end
end
end
describe "Kernel.open" do
it "needs to be reviewed for spec completeness"
end
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