Fixing several tests

Using isinstance instead of comparing classes names
Removing unnecessary tuple check, treated by the return value unpacking
Adding missing inject code tests
Adding qfile.getchar test

Fixing QLocale.to* methods
fixing __setitem__ in qbytearray

tests/qtcore/qlatin1string_test.py

@@ -0,0 +1,21 @@
+
+'''Test cases for QLatin1String'''
+
+import unittest
+
+from PySide.QtCore import QString, QLatin1String, QObject
+
+
+class ImplicitConvQLatin1String(unittest.TestCase):
+    '''Tests for implicit conversion from QLatin1String to QString'''
+
+    def testQLatin1String(self):
+        '''QString implicit convertion from QLatin1String'''
+        obj = QObject()
+        obj.setObjectName(QLatin1String('dummy'))
+
+        self.assertEqual(QString('dummy'), obj.objectName())
+
+if __name__ == '__main__':
+    unittest.main()
+