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diff --git a/spec/ruby/core/file/expand_path_spec.rb b/spec/ruby/core/file/expand_path_spec.rb
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+# -*- encoding: utf-8 -*-
+
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/common', __FILE__)
+
+describe "File.expand_path" do
+ before :each do
+ platform_is :windows do
+ @base = `cd`.chomp.tr '\\', '/'
+ @tmpdir = "c:/tmp"
+ @rootdir = "c:/"
+ end
+
+ platform_is_not :windows do
+ @base = Dir.pwd
+ @tmpdir = "/tmp"
+ @rootdir = "/"
+ end
+ end
+
+ with_feature :encoding do
+ before :each do
+ @external = Encoding.default_external
+ end
+
+ after :each do
+ Encoding.default_external = @external
+ end
+ end
+
+ it "converts a pathname to an absolute pathname" do
+ File.expand_path('').should == @base
+ File.expand_path('a').should == File.join(@base, 'a')
+ File.expand_path('a', nil).should == File.join(@base, 'a')
+ end
+
+ it "converts a pathname to an absolute pathname, Ruby-Talk:18512" do
+ # See Ruby-Talk:18512
+ File.expand_path('.a').should == File.join(@base, '.a')
+ File.expand_path('..a').should == File.join(@base, '..a')
+ File.expand_path('a../b').should == File.join(@base, 'a../b')
+ end
+
+ platform_is_not :windows do
+ it "keeps trailing dots on absolute pathname" do
+ # See Ruby-Talk:18512
+ File.expand_path('a.').should == File.join(@base, 'a.')
+ File.expand_path('a..').should == File.join(@base, 'a..')
+ end
+ end
+
+ it "converts a pathname to an absolute pathname, using a complete path" do
+ File.expand_path("", "#{@tmpdir}").should == "#{@tmpdir}"
+ File.expand_path("a", "#{@tmpdir}").should =="#{@tmpdir}/a"
+ File.expand_path("../a", "#{@tmpdir}/xxx").should == "#{@tmpdir}/a"
+ File.expand_path(".", "#{@rootdir}").should == "#{@rootdir}"
+ end
+
+ # FIXME: do not use conditionals like this around #it blocks
+ unless not home = ENV['HOME']
+ platform_is_not :windows do
+ it "converts a pathname to an absolute pathname, using ~ (home) as base" do
+ File.expand_path('~').should == home
+ File.expand_path('~', '/tmp/gumby/ddd').should == home
+ File.expand_path('~/a', '/tmp/gumby/ddd').should == File.join(home, 'a')
+ end
+
+ it "does not return a frozen string" do
+ File.expand_path('~').frozen?.should == false
+ File.expand_path('~', '/tmp/gumby/ddd').frozen?.should == false
+ File.expand_path('~/a', '/tmp/gumby/ddd').frozen?.should == false
+ end
+ end
+ platform_is :windows do
+ it "converts a pathname to an absolute pathname, using ~ (home) as base" do
+ File.expand_path('~').should == home.tr("\\", '/')
+ File.expand_path('~', '/tmp/gumby/ddd').should == home.tr("\\", '/')
+ File.expand_path('~/a', '/tmp/gumby/ddd').should == File.join(home.tr("\\", '/'), 'a')
+ end
+
+ it "does not return a frozen string" do
+ File.expand_path('~').frozen?.should == false
+ File.expand_path('~', '/tmp/gumby/ddd').frozen?.should == false
+ File.expand_path('~/a', '/tmp/gumby/ddd').frozen?.should == false
+ end
+ end
+ end
+
+ platform_is_not :windows do
+ before do
+ @home = ENV['HOME'].chomp('/')
+ end
+
+ # FIXME: these are insane!
+ it "expand path with" do
+ File.expand_path("../../bin", "/tmp/x").should == "/bin"
+ File.expand_path("../../bin", "/tmp").should == "/bin"
+ File.expand_path("../../bin", "/").should == "/bin"
+ File.expand_path("../bin", "tmp/x").should == File.join(@base, 'tmp', 'bin')
+ File.expand_path("../bin", "x/../tmp").should == File.join(@base, 'bin')
+ end
+
+ it "expand_path for commoms unix path give a full path" do
+ File.expand_path('/tmp/').should =='/tmp'
+ File.expand_path('/tmp/../../../tmp').should == '/tmp'
+ File.expand_path('').should == Dir.pwd
+ File.expand_path('./////').should == Dir.pwd
+ File.expand_path('.').should == Dir.pwd
+ File.expand_path(Dir.pwd).should == Dir.pwd
+ File.expand_path('~/').should == @home
+ File.expand_path('~/..badfilename').should == "#{@home}/..badfilename"
+ File.expand_path('..').should == Dir.pwd.split('/')[0...-1].join("/")
+ File.expand_path('~/a','~/b').should == "#{@home}/a"
+ end
+
+ it "does not replace multiple '/' at the beginning of the path" do
+ File.expand_path('////some/path').should == "////some/path"
+ end
+
+ it "replaces multiple '/' with a single '/'" do
+ File.expand_path('/some////path').should == "/some/path"
+ end
+
+ it "raises an ArgumentError if the path is not valid" do
+ lambda { File.expand_path("~a_not_existing_user") }.should raise_error(ArgumentError)
+ end
+
+ it "expands ~ENV['USER'] to the user's home directory" do
+ File.expand_path("~#{ENV['USER']}").should == @home
+ File.expand_path("~#{ENV['USER']}/a").should == "#{@home}/a"
+ end
+
+ it "does not expand ~ENV['USER'] when it's not at the start" do
+ File.expand_path("/~#{ENV['USER']}/a").should == "/~#{ENV['USER']}/a"
+ end
+
+ it "expands ../foo with ~/dir as base dir to /path/to/user/home/foo" do
+ File.expand_path('../foo', '~/dir').should == "#{@home}/foo"
+ end
+ end
+
+ it "accepts objects that have a #to_path method" do
+ File.expand_path(mock_to_path("a"), mock_to_path("#{@tmpdir}"))
+ end
+
+ it "raises a TypeError if not passed a String type" do
+ lambda { File.expand_path(1) }.should raise_error(TypeError)
+ lambda { File.expand_path(nil) }.should raise_error(TypeError)
+ lambda { File.expand_path(true) }.should raise_error(TypeError)
+ end
+
+ platform_is_not :windows do
+ it "expands /./dir to /dir" do
+ File.expand_path("/./dir").should == "/dir"
+ end
+ end
+
+ platform_is :windows do
+ it "expands C:/./dir to C:/dir" do
+ File.expand_path("C:/./dir").should == "C:/dir"
+ end
+ end
+
+ with_feature :encoding do
+ it "returns a String in the same encoding as the argument" do
+ Encoding.default_external = Encoding::SHIFT_JIS
+
+ path = "./a".force_encoding Encoding::CP1251
+ File.expand_path(path).encoding.should equal(Encoding::CP1251)
+
+ weird_path = [222, 173, 190, 175].pack('C*')
+ File.expand_path(weird_path).encoding.should equal(Encoding::ASCII_8BIT)
+ end
+
+ platform_is_not :windows do
+ it "expands a path when the default external encoding is ASCII-8BIT" do
+ Encoding.default_external = Encoding::ASCII_8BIT
+ path_8bit = [222, 173, 190, 175].pack('C*')
+ File.expand_path( path_8bit, @rootdir).should == "#{@rootdir}" + path_8bit
+ end
+ end
+
+ it "expands a path with multi-byte characters" do
+ File.expand_path("Ångström").should == "#{@base}/Ångström"
+ end
+
+ platform_is_not :windows do
+ it "raises an Encoding::CompatibilityError if the external encoding is not compatible" do
+ Encoding.default_external = Encoding::UTF_16BE
+ lambda { File.expand_path("./a") }.should raise_error(Encoding::CompatibilityError)
+ end
+ end
+ end
+
+ it "does not modify the string argument" do
+ str = "./a/b/../c"
+ File.expand_path(str, @base).should == "#{@base}/a/c"
+ str.should == "./a/b/../c"
+ end
+
+ it "does not modify a HOME string argument" do
+ str = "~/a"
+ File.expand_path(str).should == "#{Dir.home}/a"
+ str.should == "~/a"
+ end
+
+ it "returns a String when passed a String subclass" do
+ str = FileSpecs::SubString.new "./a/b/../c"
+ path = File.expand_path(str, @base)
+ path.should == "#{@base}/a/c"
+ path.should be_an_instance_of(String)
+ end
+end
+
+platform_is_not :windows do
+ describe "File.expand_path when HOME is not set" do
+ before :each do
+ @home = ENV["HOME"]
+ end
+
+ after :each do
+ ENV["HOME"] = @home
+ end
+
+ ruby_version_is ''...'2.4' do
+ it "raises an ArgumentError when passed '~' if HOME is nil" do
+ ENV.delete "HOME"
+ lambda { File.expand_path("~") }.should raise_error(ArgumentError)
+ end
+
+ it "raises an ArgumentError when passed '~/' if HOME is nil" do
+ ENV.delete "HOME"
+ lambda { File.expand_path("~/") }.should raise_error(ArgumentError)
+ end
+ end
+
+ it "raises an ArgumentError when passed '~' if HOME == ''" do
+ ENV["HOME"] = ""
+ lambda { File.expand_path("~") }.should raise_error(ArgumentError)
+ end
+ end
+end
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