Update resistor_color_expert_test.py (#3797)

Add additional tests for some edge cases.  Note that "1 ohms", "1 kiloohms" and "1 megaohms" should really be "ohm" singular but that's out of scope of the requirements for this exercise.

exercises/practice/resistor-color-expert/resistor_color_expert_test.py

@@ -49,3 +49,13 @@ def test_brown_red_orange_green_and_blue(self):
         self.assertEqual(
             resistor_label(["brown", "red", "orange", "green", "blue"]), "12.3 megaohms ±0.25%"
         )
+
+    def test_brown_black_brown_yellow_and_violet(self):
+        self.assertEqual(
+            resistor_label(["brown", "black", "brown", "yellow", "violet"]), "1.01 megaohms ±0.1%"
+        )
+
+    def test_brown_black_red_and_red(self):
+        self.assertEqual(
+            resistor_label(["brown", "black", "red", "red"]), "1 kiloohms ±2%"
+        )