fix(calculation): The get Length method is abstract now, if zero is returned it will be not verified

Author: ricardogobbosouza

src/rules/abstract-calculation.ts

@@ -9,20 +9,17 @@ export abstract class AbstractCalculation extends AbstractRule {
         const c: string = String(input).replace(/[^\d]/g, '');
         const length: number = this.getLength();
 
-        if (c.length !== length || RegExp(`${Number(c[0])}{${length}}`).test(c)) {
+        if (!c || (length > 0 && (c.length !== length || RegExp(`${Number(c[0])}{${length}}`).test(c)))) {
             return false;
         }
 
         return this.validateCalculation(c);
-
     }
 
     /**
      * Get Length.
      */
-    protected getLength(): number {
-        return 11;
-    }
+    protected abstract getLength(): number;
 
     /**
      * Validate Calculation.

src/rules/cnh.ts

@@ -2,6 +2,13 @@ import { AbstractCalculation } from './abstract-calculation';
 
 export class Cnh extends AbstractCalculation {
 
+    /**
+     * Get Length.
+     */
+    protected getLength(): number {
+        return 11;
+    }
+
     /**
      * Validate Calculation.
      */

src/rules/cpf.ts

@@ -2,6 +2,13 @@ import { AbstractCalculation } from './abstract-calculation';
 
 export class Cpf extends AbstractCalculation {
 
+    /**
+     * Get Length.
+     */
+    protected getLength(): number {
+        return 11;
+    }
+
     /**
      * Validate Calculation.
      */

src/rules/pesel.ts

@@ -3,6 +3,13 @@ import { AbstractCalculation } from './abstract-calculation';
 
 export class Pesel extends AbstractCalculation {
 
+    /**
+     * Get Length.
+     */
+    protected getLength(): number {
+        return 11;
+    }
+
     /**
      * Validate Calculation.
      */

src/rules/pis.ts

@@ -2,6 +2,13 @@ import { AbstractCalculation } from './abstract-calculation';
 
 export class Pis extends AbstractCalculation {
 
+    /**
+     * Get Length.
+     */
+    protected getLength(): number {
+        return 11;
+    }
+
     /**
      * Validate Calculation.
      */