diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5db2980..3cc99b2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,11 +7,11 @@ These steps will guide you through contributing to this project:
 - Fork the repo
 - Clone it and install dependencies
 
-		git clone https://github.com/YOUR-USERNAME/typescript-library-starter
+		git clone https://github.com/YOUR-USERNAME/rulerx
 		npm install
 
 Keep in mind that after running `npm install` the git repo is reset. So a good way to cope with this is to have a copy of the folder to push the changes, and the other to try them.
 
 Make and commit your changes. Make sure the commands npm run build and npm run test:prod are working.
 
-Finally send a [GitHub Pull Request](https://github.com/alexjoverm/typescript-library-starter/compare?expand=1) with a clear list of what you've done (read more [about pull requests](https://help.github.com/articles/about-pull-requests/)). Make sure all of your commits are atomic (one feature per commit).
+Finally send a [GitHub Pull Request](https://github.com/yuxblank/rulerx/compare?expand=1) with a clear list of what you've done (read more [about pull requests](https://help.github.com/articles/about-pull-requests/)). Make sure all of your commits are atomic (one feature per commit).
diff --git a/code-of-conduct.md b/code-of-conduct.md
index 4a9568b..0135bad 100644
--- a/code-of-conduct.md
+++ b/code-of-conduct.md
@@ -55,7 +55,7 @@ further defined and clarified by project maintainers.
 ## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at alexjovermorales@gmail.com. All
+reported by contacting the project team at yuxblank@gmail.com. All
 complaints will be reviewed and investigated and will result in a response that
 is deemed necessary and appropriate to the circumstances. The project team is
 obligated to maintain confidentiality with regard to the reporter of an incident.
diff --git a/src/rule/operators.ts b/src/rule/operators.ts
index c341e45..0e20733 100644
--- a/src/rule/operators.ts
+++ b/src/rule/operators.ts
@@ -62,3 +62,7 @@ export function noneOfList(object: any[], value: any[]): boolean {
     ).length === object.length
   )
 }
+
+export function sumGreaterThan(object: any[], value: any[]): boolean{
+  return object.reduce((a, b) => a + b, 0) > value;
+}
diff --git a/src/rule/rule-rx.ts b/src/rule/rule-rx.ts
index f51e090..17eb6ca 100644
--- a/src/rule/rule-rx.ts
+++ b/src/rule/rule-rx.ts
@@ -25,7 +25,7 @@ export class RuleRx<T> implements RuleEvaluator<T> {
             rules: evaluateRule
           })
         }
-      })
+      0})
     }
 
     if (rules.any) {
diff --git a/test/rulerx.functional.test.ts b/test/rulerx.functional.test.ts
new file mode 100644
index 0000000..f94be2d
--- /dev/null
+++ b/test/rulerx.functional.test.ts
@@ -0,0 +1,98 @@
+import {RuleRx} from '../src/rule/rule-rx'
+import {sumGreaterThan} from '../src/rule/operators'
+import {BehaviorSubject} from 'rxjs'
+import {finalize, mergeAll, tap} from 'rxjs/operators'
+
+interface Basket {
+  products: Product[]
+  customer: {name:string}
+  discount?: number;
+}
+interface Product {
+  name: string;
+  price: number;
+}
+
+describe('RuleRX functional uses cases', () => {
+
+  it('RuleRX can be used to trigger a discount whenever the user carts reach a certain amount', done => {
+
+    let customerCart1 = new BehaviorSubject<Basket>({
+      products: [{
+        name: "Art1",
+        price: 10
+      }],
+      customer: {name: "Jhon"}
+    });
+
+    let customerCart2 = new BehaviorSubject<Basket>(  {
+      products: [{
+        name: "Art3",
+        price: 50
+      }],
+      customer: {name: "Ada"}
+    });
+
+    let carts= [customerCart1,customerCart2];
+
+    new RuleRx<Basket>()
+      .evaluate(
+        {
+          all: [
+            {
+              fact: 'user cart sum is beyond 100',
+              operator: sumGreaterThan,
+              path: '$.products..price',
+              value: 100
+            }
+          ]
+        },
+      ...carts
+      )
+      .pipe(
+        mergeAll(),
+        tap(p => p.element.discount = 10),
+        finalize(() => {
+          done();
+        })
+      )
+      .subscribe(next => {
+        expect(next.element.customer.name).toEqual("Jhon");
+        expect(next.element.discount).toEqual(10);
+      });
+
+    customerCart1.next(
+      {
+        products: [{
+         name: "Art1",
+         price: 10
+        },
+          {
+            name: "Art2",
+            price: 100
+          }],
+        customer: {name: "Jhon"}
+      }
+    );
+
+
+    customerCart2.next(
+      {
+        products: [{
+          name: "Art3",
+          price: 50
+        },
+          {
+            name: "Art4",
+            price: 50
+          }],
+        customer: {name: "Ada"}
+      }
+    );
+
+    customerCart1.complete();
+    customerCart2.complete();
+
+
+  })
+})