sumAll done

sumAll/sumAll.js

@@ -1,4 +1,28 @@
-const sumAll = function() {
+const sumAll = function(...args) {
+
+    let totalOfNumbers = 0;
+    let firstNumber = args[0];
+    let lastNumber = args[args.length - 1];
+    /* If either is not a number, return ERROR */
+    if (typeof firstNumber != "number" || typeof lastNumber != "number") {
+        return 'ERROR';
+    }
+    /* If first number is greater, switch numbers */
+    if (firstNumber > lastNumber) {
+        let tempNumber = firstNumber;
+        firstNumber = lastNumber;
+        lastNumber = tempNumber;
+    }
+
+    /*If either number is negative, return 'ERROR' */
+    if (firstNumber < 0 || lastNumber < 0) {
+        return 'ERROR';
+    }
+
+    for (let i = firstNumber; i <= lastNumber; i++) {
+        totalOfNumbers += i;
+    }
+    return totalOfNumbers;
 
 }
 

sumAll/sumAll.spec.js

@@ -1,22 +1,22 @@
 const sumAll = require('./sumAll')
 
 describe('sumAll', function() {
-  it('sums numbers within the range', function() {
+    it('sums numbers within the range', function() {
-    expect(sumAll(1, 4)).toEqual(10);
+        expect(sumAll(1, 4)).toEqual(10);
-  });
+    });
-  xit('works with large numbers', function() {
+    it('works with large numbers', function() {
-    expect(sumAll(1, 4000)).toEqual(8002000);
+        expect(sumAll(1, 4000)).toEqual(8002000);
-  });
+    });
-  xit('works with larger number first', function() {
+    it('works with larger number first', function() {
-    expect(sumAll(123, 1)).toEqual(7626);
+        expect(sumAll(123, 1)).toEqual(7626);
-  });
+    });
-  xit('returns ERROR with negative numbers', function() {
+    it('returns ERROR with negative numbers', function() {
-    expect(sumAll(-10, 4)).toEqual('ERROR');
+        expect(sumAll(-10, 4)).toEqual('ERROR');
-  });
+    });
-  xit('returns ERROR with non-number parameters', function() {
+    it('returns ERROR with non-number parameters', function() {
-    expect(sumAll(10, "90")).toEqual('ERROR');
+        expect(sumAll(10, "90")).toEqual('ERROR');
-  });
+    });
-  xit('returns ERROR with non-number parameters', function() {
+    it('returns ERROR with non-number parameters', function() {
-    expect(sumAll(10, [90, 1])).toEqual('ERROR');
+        expect(sumAll(10, [90, 1])).toEqual('ERROR');
-  });
+    });
 });