Try all qr_types when automatically sizing

Add test coverage

#27

adafruit_miniqr.py

@@ -95,7 +95,7 @@ def add_data(self, data):
         self.data_list.append(data)
         datalen = sum(len(x) for x in self.data_list)
         if not self.type:
-            for qr_type in range(1, 6):
+            for qr_type in range(1, 10):
                 rs_blocks = _get_rs_blocks(qr_type, self.ECC)
                 total_data_count = 0
                 for block in rs_blocks:

tests/test_unit.py

@@ -59,8 +59,9 @@ def test_qr_pattern_mask(self):
     def test_qr_auto(self):
         # Confirm that increasing message size increases the matrix size monotonically
         sizes = []
-        for i in range(14):  # size 41 crashes
-            _m = enc(b"aBc!1234" * i)
+        for i in range(29):
+            msg = b"aBc!1234" * i
+            _m = enc(msg)
             sizes.append(_m.width)
         self.assertTrue(len(set(sizes)) > 1)
         self.assertEqual(sizes, sorted(sizes))
@@ -89,7 +90,7 @@ def test_qr_all(self):
 
     def test_qr_maximum(self):
         msg = bytes([random.randrange(32, 127) for i in range(230)])
-        _a = enc(msg, qr_type=9)
+        _a = enc(msg)
         self.assertTrue(_a is not None)