test: change data types for division task

- Change method return and parameter types to correctly throw expected exception

Author: Genyus

README.md

@@ -39,11 +39,11 @@ Using the [Java Exception Handling documentation][4] as a guide, implement the m
 Create a method that performs division while handling potential arithmetic exceptions:
 
 ```java
-public Double divide(Double numerator, Double denominator) {
+public Integer divide(Integer numerator, Integer denominator) {
     // TODO: Implement this method to divide the numerator by the denominator
-    // - return the result of the division
-    // - if the denominator is 0, catch the ArithmeticException and return null
     // - if either parameter is null, return null
+    // - catch the ArithmeticException thrown when the denominator is 0 and return null
+    // - return the result of the division
     throw new RuntimeException("Not implemented");
 }
 ```
@@ -111,8 +111,8 @@ public String processData(List<String> data, int index) {
 ExceptionExercises exercises = new ExceptionExercises();
 
 // Safe division
-Double result1 = exercises.divide(10.0, 2.0);    // Returns 5.0
-Double result2 = exercises.divide(10.0, 0.0);    // Returns null (handles ArithmeticException)
+Integer result1 = exercises.divide(10, 2);    // Returns 5
+Integer result2 = exercises.divide(10, 0);    // Returns null (handles ArithmeticException)
 
 // Safe list access
 List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);

exception-handling/src/test/java/com/cbfacademy/ExceptionExercisesTest.java

@@ -26,29 +26,29 @@ void setUp() {
     @ParameterizedTest
     @DisplayName(value = "test the divide method returns the expected result for valid inputs")
     @CsvSource({
-            "10.0, 2.0, 5.0",
-            "15.0, 3.0, 5.0",
-            "7.5, 2.5, 3.0",
-            "100.0, 4.0, 25.0",
-            "0.0, 5.0, 0.0"
+            "10, 2, 5",
+            "15, 3, 5",
+            "8, 2, 4",
+            "100, 4, 25",
+            "0, 5, 0"
     })
-    void testDivideMethodReturnsExpectedResult(Double numerator, Double denominator, Double expectedResult) {
-        Double result = exceptionExercises.divide(numerator, denominator);
+    void testDivideMethodReturnsExpectedResult(Integer numerator, Integer denominator, Integer expectedResult) {
+        Integer result = exceptionExercises.divide(numerator, denominator);
         assertEquals(expectedResult, result);
     }
 
     @Test
     @DisplayName(value = "test the divide method returns null when denominator is 0")
     void testDivideMethodReturnsNullForDivisionByZero() {
-        Double result = exceptionExercises.divide(10.0, 0.0);
+        Integer result = exceptionExercises.divide(10, 0);
         assertNull(result);
     }
 
     @Test
     @DisplayName(value = "test the divide method returns null when either parameter is null")
     void testDivideMethodReturnsNullForNullParameters() {
-        assertNull(exceptionExercises.divide(null, 5.0));
-        assertNull(exceptionExercises.divide(10.0, null));
+        assertNull(exceptionExercises.divide(null, 5));
+        assertNull(exceptionExercises.divide(10, null));
         assertNull(exceptionExercises.divide(null, null));
     }