Glasgow | 25-ITP-Sep | Abraham-Habte | Sprint 1 | Sprint1-exercise

Sprint-1/implement/dedupe.test.js

@@ -29,7 +29,8 @@ test("given an empty array, it returns an empty array", () => {
 test("given an array with no duplicates", () => {
   const input = [1, 2, 3, 4, 5];
   const result = dedupe(input);
-  expect(result).toStrictEqual([1, 2, 3, 4, 5]);
+  expect(result).not.toBe([1, 2, 3, 4, 5]);
+  expect(result).toEqual([1, 2, 3, 4, 5]);
 });
 
 // Given an array with strings or numbers

Sprint-1/implement/sum.js

@@ -1,11 +1,11 @@
 function sum(elements) {
-  return elements.reduce((accumulator, currentValue) => {
-    if (typeof currentValue === "number" && Number.isFinite(currentValue)) {
-      return accumulator + currentValue;
-    }
-    return accumulator;
+  if (!Array.isArray(elements)) return null;
+
+  return elements.reduce((accumulator, n) => {
+    return typeof n === 'number' && !isNaN(n) ? accumulator + n : accumulator;
   }, 0);
-}   
+}
+
 
 module.exports = sum;