fixed variadic templates in the case when char value is passed in place of (e.g.) %i or %d argument

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48224 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/strings/vararg.cpp

@@ -36,6 +36,7 @@ public:
 private:
     CPPUNIT_TEST_SUITE( VarArgTestCase );
         CPPUNIT_TEST( StringPrintf );
+        CPPUNIT_TEST( CharPrintf );
 #if wxUSE_STD_STRING
         CPPUNIT_TEST( StdString );
 #endif
@@ -43,6 +44,7 @@ private:
     CPPUNIT_TEST_SUITE_END();
 
     void StringPrintf();
+    void CharPrintf();
 #if wxUSE_STD_STRING
     void StdString();
 #endif
@@ -91,7 +93,34 @@ void VarArgTestCase::StringPrintf()
     // literal:
     bool cond = true;
     s2.Printf(_T("foo %s"), !cond ? s.c_str() : _T("bar"));
+}
 
+void VarArgTestCase::CharPrintf()
+{
+    wxString foo("foo");
+    wxString s;
+
+    // test using wchar_t:
+    s.Printf("char=%c", L'c');
+    WX_ASSERT_STR_EQUAL( "char=c", s );
+
+    // test wxUniCharRef:
+    s.Printf("string[1] is %c", foo[1]);
+    WX_ASSERT_STR_EQUAL( "string[1] is o", s );
+
+    // test char
+    char c = 'z';
+    s.Printf("%c to %c", 'a', c);
+    WX_ASSERT_STR_EQUAL( "a to z", s );
+
+    // test char used as integer:
+    c = 240;
+    s.Printf("value is %i (int)", c);
+    WX_ASSERT_STR_EQUAL( wxString("value is -16 (int)"), s );
+
+    unsigned char u = 240;
+    s.Printf("value is %i (int)", u);
+    WX_ASSERT_STR_EQUAL( wxString("value is 240 (int)"), s );
 }
 
 #if wxUSE_STD_STRING