Add B_MapCelsiusToFahrenheit.java

Author: ZahidFKhan

src/test/java/com/github/streams/practice/a_easy/numbers/EasyNumbersProblemSolution.java

@@ -95,6 +95,10 @@ public static Map<Integer, List<Integer>> groupingOfNumbers(List<Integer> random
   }
 
   public static long countNumberOfEvenNumbers(final List<Integer> input) {
-    return input.stream().filter(x->x%2 ==0).count();
+    return input.stream().filter(x -> x % 2 == 0).count();
+  }
+
+  public static List<Double> convertCelsiusToFahrenheit(final List<Integer> input) {
+    return input.stream().map(value -> (value * 9.0 / 5.0) + 32).toList();
   }
 }

src/test/java/com/github/streams/practice/a_easy/numbers/problems/A_CountEvenNumbers.java renamed to src/test/java/com/github/streams/practice/a_easy/numbers/problems/A_FilterCountEvenNumbers.java

@@ -14,7 +14,7 @@
  * Output = 3 <br>
  * Explanation: (1, 2, 3) are even numbers.
  */
-class A_CountEvenNumbers {
+class A_FilterCountEvenNumbers {
 
   @Test
   @Disabled

src/test/java/com/github/streams/practice/a_easy/numbers/problems/B_MapCelsiusToFahrenheit.java

@@ -0,0 +1,31 @@
+package com.github.streams.practice.a_easy.numbers.problems;
+
+import com.github.streams.practice.a_easy.numbers.EasyNumbersProblemSolution;
+import java.util.List;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Exercise focusing on the Stream.map() function. The goal is to convert a list of temperatures
+ * from Celsius (Integers) to Fahrenheit (Doubles) using the formula:
+ * F = (C * 9/5) + 32.
+ * This requires using the map function to transform each element and ensure the result is collected into
+ * a List<Double>.
+ */
+class B_MapCelsiusToFahrenheit {
+
+  @Test
+  @Disabled
+  void convertCelsiusToFahrenheit() {
+    final var input = List.of(0, 10, 25, 37, 100);
+
+    final var mySolution = EasyNumbersProblemSolution.convertCelsiusToFahrenheit(input);
+    final var yourSolution = List.<Double>of(); // WRITE YOUR IMPLEMENTATION HERE//
+
+    Assertions.assertEquals(
+        mySolution,
+        yourSolution,
+        "Your solution is incorrect. Check the Celsius to Fahrenheit formula: F = (C * 9.0 / 5.0) + 32.");
+  }
+}