BaseTools/Tests: Verify unsupported UTF-16 are rejected

Supplementary Plane characters can exist in UTF-16 files,
but they are not valid UCS-2 characters.

For example, this python interpreter code:
>>> import codecs
>>> codecs.encode(u'\U00010300', 'utf-16')
'\xff\xfe\x00\xd8\x00\xdf'

Therefore the UCS-4 0x00010300 character is encoded as two
16-bit numbers (0xd800 0xdf00) in a little endian UTF-16
file.

For more information, see:
http://en.wikipedia.org/wiki/UTF-16#U.2B10000_to_U.2B10FFFF

This test checks to make sure that BaseTools will reject these
characters in UTF-16 files.

The range of 0xd800 - 0xdfff should also be rejected as unicode code
points because they are reserved for the surrogate pair usage in
UTF-16 files.

This test was fixed by the previous commit:
"BaseTools/UniClassObject: Verify valid UCS-2 chars in UTF-16 .uni files"

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Yingke Liu <yingke.d.liu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17695 6f19259b-4bc3-4df7-8a09-765794883524

BaseTools/Tests/CheckUnicodeSourceFiles.py

@@ -38,7 +38,10 @@ class Tests(TestTools.BaseToolsTest):
     def EncodeToFile(self, encoding, string=None):
         if string is None:
             string = self.SampleData
-        data = codecs.encode(string, encoding)
+        if encoding is not None:
+            data = codecs.encode(string, encoding)
+        else:
+            data = string
         path = 'input.uni'
         self.WriteTmpFile(path, data)
         return PathClass(self.GetTmpFilePath(path))
@@ -81,6 +84,36 @@ class Tests(TestTools.BaseToolsTest):
     def testUtf16InUniFile(self):
         self.CheckFile('utf_16', shouldPass=True)
 
+    def testSupplementaryPlaneUnicodeCharInUtf16File(self):
+        #
+        # Supplementary Plane characters can exist in UTF-16 files,
+        # but they are not valid UCS-2 characters.
+        #
+        # This test makes sure that BaseTools rejects these characters
+        # if seen in a .uni file.
+        #
+        data = u'''
+            #langdef en-US "English"
+            #string STR_A #language en-US "CodePoint (\U00010300) > 0xFFFF"
+        '''
+
+        self.CheckFile('utf_16', shouldPass=False, string=data)
+
+    def testSurrogatePairUnicodeCharInUtf16File(self):
+        #
+        # Surrogate Pair code points are used in UTF-16 files to
+        # encode the Supplementary Plane characters. But, a Surrogate
+        # Pair code point which is not followed by another Surrogate
+        # Pair code point might be interpreted as a single code point
+        # with the Surrogate Pair code point.
+        #
+        # This test makes sure that BaseTools rejects these characters
+        # if seen in a .uni file.
+        #
+        data = codecs.BOM_UTF16_LE + '//\x01\xd8 '
+
+        self.CheckFile(encoding=None, shouldPass=False, string=data)
+
 TheTestSuite = TestTools.MakeTheTestSuite(locals())
 
 if __name__ == '__main__':