A test case for bug OSGeo#2720 (OSGeo#2721)

* A test case for bug OSGeo#2720 (do not split multibyte chars when parsing input)

gui/wxpython/core/testsuite/test_gcmd.py

@@ -0,0 +1,41 @@
+from grass.gunittest.case import TestCase
+from grass.gunittest.main import test
+
+
+class Rcv:
+    data = b"\xc4\x81" * 10
+    pos = 0
+
+    def recv(self):
+        start = self.pos
+        self.pos += 5
+        end = self.pos
+        if end > len(self.data):
+            return None
+        return self.data[start:end]
+
+
+class Recv_SomeTest(TestCase):
+    def test_decode(self):
+        """
+        Multibyte chars should not be split
+
+        A test case for bug #2720
+        https://github.com/OSGeo/grass/issues/2720
+        """
+        p = Rcv()
+        recv_some(p, e=0)
+
+
+if __name__ == "__main__":
+    try:
+        from grass.script.setup import set_gui_path
+
+        set_gui_path()
+
+        from core.gcmd import recv_some
+
+        test()
+    except ModuleNotFoundError:
+        # Tests can not run if wx is absent
+        pass