1 files changed, 93 insertions, 0 deletions
diff --git a/spec/ruby/language/symbol_spec.rb b/spec/ruby/language/symbol_spec.rb
new file mode 100644
index 0000000000..41be5b2236
--- /dev/null
+++ b/spec/ruby/language/symbol_spec.rb
@@ -0,0 +1,93 @@
+require File.expand_path('../../spec_helper', __FILE__)
+
+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 "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
+end