test: pin CHANNEL_BANDS consistency and DFS coverage

tests/test_pineap_bands.py

@@ -28,6 +28,19 @@ class ChannelBandTest(unittest.TestCase):
             self.assertIsNone(server.channel_band(ch))
 
 
+class ChannelBandsConsistencyTest(unittest.TestCase):
+    def test_lists_match_channel_band(self):
+        for band, channels in server.CHANNEL_BANDS.items():
+            for ch in channels:
+                self.assertEqual(server.channel_band(ch), band, '%s should be %s' % (ch, band))
+
+    def test_boundaries(self):
+        self.assertEqual(server.CHANNEL_BANDS[server.BAND_2G][-1], 14)
+        self.assertEqual(server.CHANNEL_BANDS[server.BAND_5G][-1], 177)
+        self.assertEqual(server.CHANNEL_BANDS[server.BAND_6G][0], 181)
+        self.assertEqual(server.CHANNEL_BANDS[server.BAND_6G][-1], 233)
+
+
 class ChannelFreqTest(unittest.TestCase):
     def test_freqs(self):
         self.assertEqual(server.channel_freq(server.BAND_2G, 1), 2412)
@@ -50,9 +63,12 @@ class BandAuxTest(unittest.TestCase):
         self.assertEqual(server.band_radio(server.BAND_6G), 'radio1')
 
     def test_dfs_marker(self):
-        self.assertIn(52, server.DFS_CHANNELS)
-        self.assertIn(144, server.DFS_CHANNELS)
-        self.assertNotIn(149, server.DFS_CHANNELS)
+        for ch in (52, 64, 100, 144):
+            self.assertIn(ch, server.DFS_CHANNELS)
+        for ch in (36, 48, 149):
+            self.assertNotIn(ch, server.DFS_CHANNELS)
+        self.assertEqual(set(server.DFS_CHANNELS),
+                         set(range(52, 65, 4)) | set(range(100, 145, 4)))
 
 
 if __name__ == '__main__':