fix(rules): Validate number before in of Even, Negavite, Positive rules

Author: ricardogobbosouza

awesome-validator.min.js

@@ -1,11 +1,12 @@
 import { AbstractRule } from './abstract-rule';
+import { IntVal } from './int-val';
 
 export class Even extends AbstractRule {
 
     /**
      * Validate.
      */
     public validate(input: any): boolean {
-        return Number(input) % 2 === 0;
+        return new IntVal().validate(input) && input % 2 === 0;
     }
 }

src/rules/even.ts

@@ -7,10 +7,6 @@ export class Negative extends AbstractRule {
      * Validate.
      */
     public validate(input: any): boolean {
-        if (!new NumberVal().validate(input)) {
-            return false;
-        }
-
-        return input < 0;
+        return new NumberVal().validate(input) && input < 0;
     }
 }

src/rules/negative.ts

@@ -7,10 +7,6 @@ export class Positive extends AbstractRule {
      * Validate.
      */
     public validate(input: any): boolean {
-        if (!new NumberVal().validate(input)) {
-            return false;
-        }
-
-        return input > 0;
+        return new NumberVal().validate(input) && input > 0;
     }
 }

src/rules/positive.ts

@@ -16,8 +16,6 @@ describe('Even', () => {
     });
 
     it('values is valid', () => {
-        assert.isTrue(even.validate(null));
-        assert.isTrue(even.validate(''));
         assert.isTrue(even.validate('2'));
         assert.isTrue(even.validate(-2));
         assert.isTrue(even.validate(-0));
@@ -26,6 +24,8 @@ describe('Even', () => {
     });
 
     it('values is not valid', () => {
+        assert.isFalse(even.validate(''));
+        assert.isFalse(even.validate(null));
         assert.isFalse(even.validate(undefined));
         assert.isFalse(even.validate(-3));
         assert.isFalse(even.validate(-1));