1 files changed, 72 insertions, 0 deletions
diff --git a/spec/ruby/core/string/shared/to_sym.rb b/spec/ruby/core/string/shared/to_sym.rb
new file mode 100644
index 0000000000..833eae100e
--- /dev/null
+++ b/spec/ruby/core/string/shared/to_sym.rb
@@ -0,0 +1,72 @@
+describe :string_to_sym, shared: true do
+  it "returns the symbol corresponding to self" do
+    "Koala".send(@method).should equal :Koala
+    'cat'.send(@method).should equal :cat
+    '@cat'.send(@method).should equal :@cat
+    'cat and dog'.send(@method).should equal :"cat and dog"
+    "abc=".send(@method).should equal :abc=
+  end
+
+  it "does not special case +(binary) and -(binary)" do
+    "+(binary)".send(@method).should equal :"+(binary)"
+    "-(binary)".send(@method).should equal :"-(binary)"
+  end
+
+  it "does not special case certain operators" do
+    "!@".send(@method).should equal :"!@"
+    "~@".send(@method).should equal :"~@"
+    "!(unary)".send(@method).should equal :"!(unary)"
+    "~(unary)".send(@method).should equal :"~(unary)"
+    "+(unary)".send(@method).should equal :"+(unary)"
+    "-(unary)".send(@method).should equal :"-(unary)"
+  end
+
+  it "returns a US-ASCII Symbol for a UTF-8 String containing only US-ASCII characters" do
+    sym = "foobar".send(@method)
+    sym.encoding.should == Encoding::US_ASCII
+    sym.should equal :"foobar"
+  end
+
+  it "returns a US-ASCII Symbol for a binary String containing only US-ASCII characters" do
+    sym = "foobar".b.send(@method)
+    sym.encoding.should == Encoding::US_ASCII
+    sym.should equal :"foobar"
+  end
+
+  it "returns a UTF-8 Symbol for a UTF-8 String containing non US-ASCII characters" do
+    sym = "il était une fois".send(@method)
+    sym.encoding.should == Encoding::UTF_8
+    sym.should equal :"il était une #{'fois'}"
+  end
+
+  it "returns a UTF-16LE Symbol for a UTF-16LE String containing non US-ASCII characters" do
+    utf16_str = "UtéF16".encode(Encoding::UTF_16LE)
+    sym = utf16_str.send(@method)
+    sym.encoding.should == Encoding::UTF_16LE
+    sym.to_s.should == utf16_str
+  end
+
+  it "returns a binary Symbol for a binary String containing non US-ASCII characters" do
+    binary_string = "binarí".b
+    sym = binary_string.send(@method)
+    sym.encoding.should == Encoding::BINARY
+    sym.to_s.should == binary_string
+  end
+
+  it "ignores existing symbols with different encoding" do
+    source = "fée"
+
+    iso_symbol = source.dup.force_encoding(Encoding::ISO_8859_1).send(@method)
+    iso_symbol.encoding.should == Encoding::ISO_8859_1
+    binary_symbol = source.dup.force_encoding(Encoding::BINARY).send(@method)
+    binary_symbol.encoding.should == Encoding::BINARY
+  end
+
+  it "raises an EncodingError for UTF-8 String containing invalid bytes" do
+    invalid_utf8 = "\xC3"
+    invalid_utf8.should_not.valid_encoding?
+    -> {
+      invalid_utf8.send(@method)
+    }.should raise_error(EncodingError, 'invalid symbol in encoding UTF-8 :"\xC3"')
+  end
+end