mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
299 lines
8.7 KiB
Ruby
299 lines
8.7 KiB
Ruby
# -*- encoding: binary -*-
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require_relative '../spec_helper'
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# TODO: rewrite these horrid specs. it "are..." seriously?!
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describe "Ruby character strings" do
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before :each do
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@ip = 'xxx' # used for interpolation
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$ip = 'xxx'
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end
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it "don't get interpolated when put in single quotes" do
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'#{@ip}'.should == '#{@ip}'
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end
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it 'get interpolated with #{} when put in double quotes' do
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"#{@ip}".should == 'xxx'
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end
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it "interpolate instance variables just with the # character" do
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"#@ip".should == 'xxx'
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end
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it "interpolate global variables just with the # character" do
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"#$ip".should == 'xxx'
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end
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it "allows underscore as part of a variable name in a simple interpolation" do
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@my_ip = 'xxx'
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"#@my_ip".should == 'xxx'
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end
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it "does not interpolate invalid variable names" do
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"#@".should == '#@'
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"#$%".should == '#$%'
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end
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it "has characters [.(=?!# end simple # interpolation" do
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"#@ip[".should == 'xxx['
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"#@ip.".should == 'xxx.'
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"#@ip(".should == 'xxx('
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"#@ip=".should == 'xxx='
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"#@ip?".should == 'xxx?'
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"#@ip!".should == 'xxx!'
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"#@ip#@ip".should == 'xxxxxx'
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end
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it "don't get confused by partial interpolation character sequences" do
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"#@".should == '#@'
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"#@ ".should == '#@ '
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"#@@".should == '#@@'
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"#@@ ".should == '#@@ '
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"#$ ".should == '#$ '
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"#\$".should == '#$'
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end
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it "allows using non-alnum characters as string delimiters" do
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%(hey #{@ip}).should == "hey xxx"
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%[hey #{@ip}].should == "hey xxx"
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%{hey #{@ip}}.should == "hey xxx"
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%<hey #{@ip}>.should == "hey xxx"
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%!hey #{@ip}!.should == "hey xxx"
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%@hey #{@ip}@.should == "hey xxx"
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%#hey hey#.should == "hey hey"
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%%hey #{@ip}%.should == "hey xxx"
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%^hey #{@ip}^.should == "hey xxx"
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%&hey #{@ip}&.should == "hey xxx"
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%*hey #{@ip}*.should == "hey xxx"
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%-hey #{@ip}-.should == "hey xxx"
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%_hey #{@ip}_.should == "hey xxx"
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%=hey #{@ip}=.should == "hey xxx"
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%+hey #{@ip}+.should == "hey xxx"
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%~hey #{@ip}~.should == "hey xxx"
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%:hey #{@ip}:.should == "hey xxx"
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%;hey #{@ip};.should == "hey xxx"
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%"hey #{@ip}".should == "hey xxx"
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%|hey #{@ip}|.should == "hey xxx"
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%?hey #{@ip}?.should == "hey xxx"
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%/hey #{@ip}/.should == "hey xxx"
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%,hey #{@ip},.should == "hey xxx"
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%.hey #{@ip}..should == "hey xxx"
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# surprised? huh
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%'hey #{@ip}'.should == "hey xxx"
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%\hey #{@ip}\.should == "hey xxx"
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%`hey #{@ip}`.should == "hey xxx"
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%$hey #{@ip}$.should == "hey xxx"
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end
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it "using percent with 'q', stopping interpolation" do
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%q(#{@ip}).should == '#{@ip}'
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end
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it "using percent with 'Q' to interpolate" do
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%Q(#{@ip}).should == 'xxx'
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end
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# The backslashes :
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#
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# \t (tab), \n (newline), \r (carriage return), \f (form feed), \b
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# (backspace), \a (bell), \e (escape), \s (whitespace), \nnn (octal),
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# \xnn (hexadecimal), \cx (control x), \C-x (control x), \M-x (meta x),
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# \M-\C-x (meta control x)
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it "backslashes follow the same rules as interpolation" do
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"\t\n\r\f\b\a\e\s\075\x62\cx".should == "\t\n\r\f\b\a\e =b\030"
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'\t\n\r\f\b\a\e =b\030'.should == "\\t\\n\\r\\f\\b\\a\\e =b\\030"
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end
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it "calls #to_s when the object is not a String" do
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obj = mock('to_s')
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obj.stub!(:to_s).and_return('42')
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"#{obj}".should == '42'
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end
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it "calls #to_s as a private method" do
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obj = mock('to_s')
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obj.stub!(:to_s).and_return('42')
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class << obj
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private :to_s
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end
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"#{obj}".should == '42'
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end
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it "uses an internal representation when #to_s doesn't return a String" do
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obj = mock('to_s')
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obj.stub!(:to_s).and_return(42)
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# See rubyspec commit 787c132d by yugui. There is value in
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# ensuring that this behavior works. So rather than removing
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# this spec completely, the only thing that can be asserted
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# is that if you interpolate an object that fails to return
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# a String, you will still get a String and not raise an
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# exception.
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"#{obj}".should be_an_instance_of(String)
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end
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it "allows a dynamic string to parse a nested do...end block as an argument to a call without parens, interpolated" do
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s = eval 'eval "#{proc do; 1; end.call}"'
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s.should == 1
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end
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it "are produced from character shortcuts" do
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?z.should == 'z'
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end
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it "are produced from control character shortcuts" do
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# Control-Z
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?\C-z.should == "\x1A"
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# Meta-Z
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?\M-z.should == "\xFA"
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# Meta-Control-Z
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?\M-\C-z.should == "\x9A"
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end
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describe "Unicode escaping" do
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it "can be done with \\u and four hex digits" do
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[ ["\u0000", 0x0000],
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["\u2020", 0x2020]
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].should be_computed_by(:ord)
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end
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it "can be done with \\u{} and one to six hex digits" do
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[ ["\u{a}", 0xa],
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["\u{ab}", 0xab],
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["\u{abc}", 0xabc],
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["\u{1abc}", 0x1abc],
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["\u{12abc}", 0x12abc],
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["\u{100000}", 0x100000]
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].should be_computed_by(:ord)
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end
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# TODO: spec other source encodings
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describe "with ASCII_8BIT source encoding" do
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it "produces an ASCII string when escaping ASCII characters via \\u" do
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"\u0000".encoding.should == Encoding::BINARY
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end
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it "produces an ASCII string when escaping ASCII characters via \\u{}" do
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"\u{0000}".encoding.should == Encoding::BINARY
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end
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it "produces a UTF-8-encoded string when escaping non-ASCII characters via \\u" do
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"\u1234".encoding.should == Encoding::UTF_8
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end
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it "produces a UTF-8-encoded string when escaping non-ASCII characters via \\u{}" do
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"\u{1234}".encoding.should == Encoding::UTF_8
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end
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end
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end
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end
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# TODO: rewrite all specs above this
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describe "Ruby String literals" do
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def str_concat
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"foo" "bar" "baz"
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end
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def long_string_literals
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"Beautiful is better than ugly." \
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"Explicit is better than implicit."
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end
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it "on a single line with spaces in between are concatenated together" do
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str_concat.should == "foobarbaz"
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end
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it "on multiple lines with newlines and backslash in between are concatenated together" do
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long_string_literals.should == "Beautiful is better than ugly.Explicit is better than implicit."
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end
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describe "with a magic frozen comment" do
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it "produce the same object each time" do
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ruby_exe(fixture(__FILE__, "freeze_magic_comment_one_literal.rb")).chomp.should == "true"
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end
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it "produce the same object for literals with the same content" do
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ruby_exe(fixture(__FILE__, "freeze_magic_comment_two_literals.rb")).chomp.should == "true"
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end
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it "produce the same object for literals with the same content in different files" do
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ruby_exe(fixture(__FILE__, "freeze_magic_comment_across_files.rb")).chomp.should == "true"
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end
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it "produce different objects for literals with the same content in different files if the other file doesn't have the comment" do
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ruby_exe(fixture(__FILE__, "freeze_magic_comment_across_files_no_comment.rb")).chomp.should == "true"
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end
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it "produce different objects for literals with the same content in different files if they have different encodings" do
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ruby_exe(fixture(__FILE__, "freeze_magic_comment_across_files_diff_enc.rb")).chomp.should == "true"
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end
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end
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end
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describe "Ruby String interpolation" do
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it "permits an empty expression" do
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s = "#{}" # rubocop:disable Lint/EmptyInterpolation
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s.should.empty?
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s.should_not.frozen?
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end
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it "returns a string with the source encoding by default" do
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"a#{"b"}c".encoding.should == Encoding::BINARY
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eval('"a#{"b"}c"'.force_encoding("us-ascii")).encoding.should == Encoding::US_ASCII
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eval("# coding: US-ASCII \n 'a#{"b"}c'").encoding.should == Encoding::US_ASCII
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end
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it "returns a string with the source encoding, even if the components have another encoding" do
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a = "abc".force_encoding("euc-jp")
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"#{a}".encoding.should == Encoding::BINARY
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b = "abc".encode("utf-8")
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"#{b}".encoding.should == Encoding::BINARY
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end
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it "raises an Encoding::CompatibilityError if the Encodings are not compatible" do
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a = "\u3042"
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b = "\xff".force_encoding "binary"
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-> { "#{a} #{b}" }.should raise_error(Encoding::CompatibilityError)
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end
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it "creates a non-frozen String" do
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code = <<~'RUBY'
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"a#{6*7}c"
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RUBY
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eval(code).should_not.frozen?
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end
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ruby_version_is "3.0" do
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it "creates a non-frozen String when # frozen-string-literal: true is used" do
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code = <<~'RUBY'
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# frozen-string-literal: true
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"a#{6*7}c"
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RUBY
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eval(code).should_not.frozen?
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end
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end
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ruby_version_is ""..."3.0" do
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it "creates a frozen String when # frozen-string-literal: true is used" do
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code = <<~'RUBY'
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# frozen-string-literal: true
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"a#{6*7}c"
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RUBY
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eval(code).should.frozen?
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end
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end
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end
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