require_relative '../spec_helper' describe "A Symbol literal" do it "is a ':' followed by any number of valid characters" do a = :foo a.should be_kind_of(Symbol) a.inspect.should == ':foo' end it "is a ':' followed by any valid variable, method, or constant name" do # Add more of these? [ :Foo, :foo, :@foo, :@@foo, :$foo, :_, :~, :- , :FOO, :_Foo, :&, :_9 ].each { |s| s.should be_kind_of(Symbol) } end it "is a ':' followed by a single- or double-quoted string that may contain otherwise invalid characters" do [ [:'foo bar', ':"foo bar"'], [:'++', ':"++"'], [:'9', ':"9"'], [:"foo #{1 + 1}", ':"foo 2"'], [:"foo\nbar", ':"foo\nbar"'], ].each { |sym, str| sym.should be_kind_of(Symbol) sym.inspect.should == str } end it 'inherits the encoding of the magic comment and can have a binary encoding' do ruby_exe(fixture(__FILE__, "binary_symbol.rb")) .should == "[105, 108, 95, 195, 169, 116, 97, 105, 116]\n#{Encoding::BINARY.name}\n" end it "may contain '::' in the string" do :'Some::Class'.should be_kind_of(Symbol) end it "is converted to a literal, unquoted representation if the symbol contains only valid characters" do a, b, c = :'foo', :'+', :'Foo__9' a.should be_kind_of(Symbol) a.inspect.should == ':foo' b.should be_kind_of(Symbol) b.inspect.should == ':+' c.should be_kind_of(Symbol) c.inspect.should == ':Foo__9' end it "can be created by the %s-delimited expression" do a, b = :'foo bar', %s{foo bar} b.should be_kind_of(Symbol) b.inspect.should == ':"foo bar"' b.should == a end it "is the same object when created from identical strings" do var = "@@var" [ [:symbol, :symbol], [:'a string', :'a string'], [:"#{var}", :"#{var}"] ].each { |a, b| a.should equal(b) } end it "can contain null in the string" do eval(':"\0" ').inspect.should == ':"\\x00"' end it "can be an empty string" do c = :'' c.should be_kind_of(Symbol) c.inspect.should == ':""' end it "can be :!, :!=, or :!~" do %w{'!', '!=', '!~'}.each do |sym| sym.to_sym.to_s.should == sym end end it "can be created from list syntax %i{a b c} without interpolation" do %i{a b #{c}}.should == [:a, :b, :"\#{c}"] end it "can be created from list syntax %I{a b c} with interpolation" do %I{a b #{"c"}}.should == [:a, :b, :c] end it "with invalid bytes raises an EncodingError at parse time" do ScratchPad.record [] -> { eval 'ScratchPad << 1; :"\xC3"' }.should raise_error(EncodingError, /invalid/) ScratchPad.recorded.should == [] end end