refactoring: Testvariablen verbessert

src/test/test_funktionen.c

@@ -236,9 +236,9 @@ void test_current_at_voltage12_resistance6(void)
     int expected = 2;
 
     /* act */
-    int v = 12;
-    int r = 6;
-    actual = calculateCurrent(v, r);
+    int voltage = 12;
+    int resistance = 6;
+    actual = calculateCurrent(voltage, resistance);
 
     /* assert */
     TEST_ASSERT_EQUAL_INT(expected, actual);