Added a regression test to detect a sequence of multiple trail surrogate code units

git-svn-id: http://svn.code.sf.net/p/utfcpp/code@99 a809a056-fc17-0410-9590-b4f493f8b08e

Conflicts:
	v2_0/test_drivers/regression_tests/reg_tests_driver.cpp

test_drivers/regression_tests/r2_2_2/basic_functionality.h

@@ -0,0 +1,24 @@
+#include "../../../source/utf8.h"
+using namespace utf8;
+
+// [ 2852872 ] invalid utf16 strings were parsed without any error
+void id_2852872()
+{
+    const unsigned short two_trail_surrogates[] = {0xdd00, 0xdd01, 0};
+    vector<char> utf8_result;
+    try
+    {
+        utf8::utf16to8(two_trail_surrogates, two_trail_surrogates+2, back_inserter(utf8_result));
+        // should throw in the previous line and never get here
+        check(false);
+    }
+    catch(utf8::invalid_utf16&)
+    {
+        // this is what we expect
+    }
+    catch(...)
+    {
+        // an unexpected exception happened
+        check(false);
+    }
+}

test_drivers/regression_tests/reg_tests_driver.cpp

@@ -1,4 +1,5 @@
 #include <iostream>
+#include <vector>
 using namespace std;
 
 inline void check_impl (bool condition, const char* file, int line)
@@ -18,7 +19,8 @@ inline void check_impl (bool condition, const char* file, int line)
 // Release 1.0 Beta 3
 #include "r1_0Beta3/basic_functionality.h"
 
-
+// Release 2.2.2
+#include "r2_2_2/basic_functionality.h"
 
 int main()
 {
@@ -37,4 +39,8 @@ int main()
 // Release 1.0 Beta 3
 //r1_0Beta3/basic_functionality.h
     id_1538338();   
+
+// Release 2.2.2
+//r2_2_2/basic_functionality.h
+    id_2852872();
 }