Refactoring: organise code

tests/test_currencyExchange.c

@@ -12,8 +12,12 @@ void tearDown(void)
 }
 
 void test_toUSD(void) {
-    int length = 5;
+
+    /* Arrange */
+
+    int length   = 5;
     float euro[] = {34, 233, 400, 100, 45};
+    
     float expectedUSD[length];
     float resultUSD[length];
 
@@ -21,10 +25,14 @@ void test_toUSD(void) {
         resultUSD[i] = toUSD(euro[i]);
     }
 
+    /* Act */
+
     for (int i = 0; i < length; i++) {
         expectedUSD[i] = euro[i] * CURRENT_USD_RATE_OF_ONE_EURO;
     }
 
+    /* Assert */
+
     for (int i = 0; i < length; i++) {
         TEST_ASSERT_EQUAL_FLOAT(expectedUSD[i], resultUSD[i]);
     }