diff --git a/client/core/src/directives/specs/validation.spec.js b/client/core/src/directives/specs/validation.spec.js
index e69de29bb..f13f0024f 100644
--- a/client/core/src/directives/specs/validation.spec.js
+++ b/client/core/src/directives/specs/validation.spec.js
@@ -0,0 +1,186 @@
+describe('Directive validation', () => {
+    let scope;
+    let element;
+    let compile;
+
+    beforeEach(() => {
+        angular.mock.module('client');
+    });
+
+    compile = (_element, validations, value) => {
+        inject(($compile, $rootScope, aclService, _$timeout_, $window) => {
+            $window.validations = validations;
+            scope = $rootScope.$new();
+            scope.user = {name: value};
+            element = angular.element(_element);
+            $compile(element)(scope);
+            scope.$digest();
+        });
+    };
+
+    it(`should throw an error if the vnValidation doesn't have the right syntax`, () => {
+        let html = `<input type="name" ng-model="user.name" vn-validation="user"/>`;
+
+        expect(() => {
+            compile(html, {});
+        }).toThrow(new Error(`vnValidation: Attribute must have this syntax: [entity].[field]`));
+    });
+
+    it('should throw an error if the window.validations aint defined', () => {
+        let html = `<input type="name" ng-model="user.name" vn-validation="user.name"/>`;
+
+        expect(() => {
+            compile(html, {});
+        }).toThrow(new Error(`vnValidation: Entity 'User' doesn't exist`));
+    });
+
+    describe('Validator presence()', () => {
+        it('should not validate the user name as it is an empty string', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'presence'}]}}};
+            compile(html, validations, 'Spiderman');
+            scope.user.name = '';
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+    });
+
+    describe('Validator absence()', () => {
+        it('should not validate the entity as it should be an empty string', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'absence'}]}}};
+            compile(html, validations, 'Spiderman');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+
+        it('should validate the entity as it is an empty string', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'absence'}]}}};
+            compile(html, validations, '');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-valid');
+            expect(element[0].classList).not.toContain('ng-invalid');
+        });
+    });
+
+    describe('Validator length()', () => {
+        it('should not validate the user name as it should have min length of 15', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'length', min: 10, max: 50, is: 15}]}}};
+            compile(html, validations, 'fifteen!');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+
+        it('should validate the user name as it has length of 15', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'length', min: 10, max: 50, is: 15}]}}};
+            compile(html, validations, 'fifteen length!');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-valid');
+            expect(element[0].classList).not.toContain('ng-invalid');
+        });
+
+        it('should not validate the user name as it should have min length of 10', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'length', min: 10}]}}};
+            compile(html, validations, 'shortname');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+
+        it('should validate the user name as its length is greater then the minimum', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'length', min: 10}]}}};
+            compile(html, validations, 'verylongname');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-valid');
+            expect(element[0].classList).not.toContain('ng-invalid');
+        });
+
+        it('should not validate the user name as its length is greater then the maximum', () => {
+            let html = `<form><input type="name" ng-model="user.name" vn-validation="user.name"/></form>`;
+            let validations = {User: {validations: {name: [{validation: 'length', max: 10}]}}};
+            compile(html, validations, 'toolongname');
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+    });
+
+    describe('Validator numericality()', () => {
+        it('should not validate the phone number as it should a integer', () => {
+            let html = `<form><input type="text" ng-model="user.phone" vn-validation="user.phone"/></form>`;
+            let validations = {User: {validations: {phone: [{validation: 'numericality', is: 'what is this?'}]}}};
+            compile(html, validations, 'spiderman');
+            scope.user.phone = 'this is not a phone number!';
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+
+        it('should validate the phone number as it an integer', () => {
+            let html = `<form><input type="text" ng-model="user.phone" vn-validation="user.phone"/></form>`;
+            let validations = {User: {validations: {phone: [{validation: 'numericality', is: 'what is this?'}]}}};
+            compile(html, validations, 'spiderman');
+            scope.user.phone = '555555555';
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-valid');
+            expect(element[0].classList).not.toContain('ng-invalid');
+        });
+    });
+
+    describe('Validator inclusion()', () => {
+        it('should not validate the phone number as it is not an integer', () => {
+            let html = `<form><input type="text" ng-model="user.phone" vn-validation="user.phone"/></form>`;
+            let validations = {User: {validations: {phone: [{validation: 'inclusion'}]}}};
+            compile(html, validations, 'spiderman');
+            scope.user.phone = 'this is not a phone number!';
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+    });
+
+    describe('Validator exclusion()', () => {
+        it('should validate the phone number as it is an integer', () => {
+            let html = `<form><input type="text" ng-model="user.phone" vn-validation="user.phone"/></form>`;
+            let validations = {User: {validations: {phone: [{validation: 'exclusion'}]}}};
+            compile(html, validations, 'spiderman');
+            scope.user.phone = '555555555';
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-valid');
+            expect(element[0].classList).not.toContain('ng-invalid');
+        });
+    });
+
+    describe('Validator format()', () => {
+        it('should not validate the email number as it doesnt contain @', () => {
+            let html = `<form><input type="text" ng-model="user.email" vn-validation="user.email"/></form>`;
+            let validations = {User: {validations: {email: [{validation: 'format', with: '@'}]}}};
+            compile(html, validations, 'spiderman');
+            scope.user.email = 'userverdnatura.es';
+            scope.$digest();
+
+            expect(element[0].classList).toContain('ng-invalid');
+            expect(element[0].classList).not.toContain('ng-valid');
+        });
+    });
+});
diff --git a/client/core/src/directives/validation.js b/client/core/src/directives/validation.js
index cd3878d9e..10669e738 100644
--- a/client/core/src/directives/validation.js
+++ b/client/core/src/directives/validation.js
@@ -40,7 +40,7 @@ export function directive(interpolate, compile, $window) {
         let errorShown = false;
 
         input.$options.$$options.allowInvalid = true;
-        input.$validators.entity = function(value) {
+        input.$validators.entity = value => {
             try {
                 validateAll(value, validations);
                 return true;
@@ -51,9 +51,9 @@ export function directive(interpolate, compile, $window) {
             }
         };
 
-        scope.$watch(function() {
+        scope.$watch(() => {
             return (form.$submitted || input.$dirty) && input.$invalid;
-        }, function(value) {
+        }, value => {
             let parent = element.parent();
 
             if (value) {
diff --git a/client/core/src/lib/app.js b/client/core/src/lib/app.js
index 5851357d8..3b58309b4 100644
--- a/client/core/src/lib/app.js
+++ b/client/core/src/lib/app.js
@@ -12,7 +12,7 @@ export default class App {
         this.$rootScope = $rootScope;
     }
     show(message) {
-        if (this.snackbar) this.snackbar.show({message: message, timeout: 400});
+        if (this.snackbar) this.snackbar.show({message: message});
     }
     showMessage(message) {
         this.show(message);
diff --git a/client/core/src/lib/validator.js b/client/core/src/lib/validator.js
index d31fa9e36..c29142653 100644
--- a/client/core/src/lib/validator.js
+++ b/client/core/src/lib/validator.js
@@ -1,19 +1,20 @@
 import {validator} from 'vendor';
 
 export const validators = {
-    presence: function(value, conf) {
+    presence: value => {
         if (validator.isEmpty(value))
             throw new Error(`Value can't be empty`);
     },
-    absence: function(value, conf) {
+    absence: value => {
         if (!validator.isEmpty(value))
             throw new Error(`Value should be empty`);
     },
-    length: function(value, conf) {
+    length: (value, conf) => {
         let options = {
             min: conf.min || conf.is,
             max: conf.max || conf.is
         };
+
         if (!validator.isLength(value, options)) {
             if (conf.is) {
                 throw new Error(`Value should be ${conf.is} characters long`);
@@ -26,26 +27,26 @@ export const validators = {
             }
         }
     },
-    numericality: function(value, conf) {
+    numericality: (value, conf) => {
         if (conf.int) {
             if (!validator.isInt(value))
                 throw new Error(`Value should be integer`);
         } else if (!validator.isNumeric(value))
             throw new Error(`Value should be a number`);
     },
-    inclusion: function(value, conf) {
+    inclusion: (value, conf) => {
         if (!validator.isIn(value, conf.in))
             throw new Error(`Invalid value`);
     },
-    exclusion: function(value, conf) {
+    exclusion: (value, conf) => {
         if (validator.isIn(value, conf.in))
             throw new Error(`Invalid value`);
     },
-    format: function(value, conf) {
+    format: (value, conf) => {
         if (!validator.matches(value, conf.with))
             throw new Error(`Invalid value`);
     },
-    custom: function(value, conf) {
+    custom: (value, conf) => {
         if (!conf.bindedFunction(value))
             throw new Error(`Invalid value`);
     }
diff --git a/services/mailer/application/auth.js b/services/mailer/application/auth.js
index 7e9457537..dc84cd911 100644
--- a/services/mailer/application/auth.js
+++ b/services/mailer/application/auth.js
@@ -47,8 +47,7 @@ module.exports = {
             this.request.user = {
                 id: token.userId,
                 token: this.getToken()
-            }
-
+            };
             this.next();
         });
     },
diff --git a/services/mailer/application/config.js b/services/mailer/application/config.js
index 1442e85ed..f4e90f14a 100644
--- a/services/mailer/application/config.js
+++ b/services/mailer/application/config.js
@@ -1,18 +1,23 @@
 var path = require('path');
-var fs = require('fs');
-var config = {};
+let defaultFile = 'datasources.json';
 
-let devConfigPath = path.join(__dirname, '/config/datasources.development.json');
-let configPath = path.join(__dirname, '/config/datasources.json');
+function getFile(fileName) {
+    return require(path.join(__dirname, `/config/${fileName}`));
+}
 
 try {
-    config = Object.assign(require(configPath), require(devConfigPath));
+    let envFile = 'datasources.development.json';
+    
+    if (process.env.NODE_ENV === 'test')
+        envFile = 'datasources.test.json';
+
+    config = getFile(envFile);
 } catch (e) {
     if (e.code == 'MODULE_NOT_FOUND')
-        config = require(configPath);
+        config = getFile(defaultFile);
 }
 
 config.proxy = require('../../nginx/config.json');
 config.package = require('../package.json');
 
-module.exports = config;
\ No newline at end of file
+module.exports = config;
diff --git a/services/mailer/application/config/datasources.test.json b/services/mailer/application/config/datasources.test.json
index 69943439d..d3a2d8b33 100644
--- a/services/mailer/application/config/datasources.test.json
+++ b/services/mailer/application/config/datasources.test.json
@@ -4,14 +4,14 @@
         "debug": false,
         "defaultLanguage": "es",
         "senderMail": "noreply@localhost",
-        "senderName": ""
+        "senderName": "VerdNatura"
     },
     "mysql": {
         "host": "localhost",
         "port": 3306,
-        "user": "reports",
+        "user": "root",
         "password": "",
-        "database": ""
+        "database": "vn"
     },
     "smtp": {
         "host": "localhost",
diff --git a/services/mailer/application/mail.js b/services/mailer/application/mail.js
index 3980e5128..04af6b007 100644
--- a/services/mailer/application/mail.js
+++ b/services/mailer/application/mail.js
@@ -12,15 +12,17 @@ module.exports = {
      * Load mail config.
      */
     init: function() {
+
         this.transporter = nodemailer.createTransport(config.smtp);
 
         this.transporter.verify(function(error, success) {
             if (error) {
-                throw new Error(error);
+                console.error(error);
             } else if (config.app.debug) {
                 console.log('SMTP connection stablished');
             }
         });
+
     },
 
     /**
diff --git a/services/print/application/config.js b/services/print/application/config.js
index 1442e85ed..c46f236f8 100644
--- a/services/print/application/config.js
+++ b/services/print/application/config.js
@@ -1,15 +1,20 @@
 var path = require('path');
-var fs = require('fs');
-var config = {};
+let defaultFile = 'datasources.json';
 
-let devConfigPath = path.join(__dirname, '/config/datasources.development.json');
-let configPath = path.join(__dirname, '/config/datasources.json');
+function getFile(fileName) {
+    return require(path.join(__dirname, `/config/${fileName}`));
+}
 
 try {
-    config = Object.assign(require(configPath), require(devConfigPath));
+    let envFile = 'datasources.development.json';
+    
+    if (process.env.NODE_ENV === 'test')
+        envFile = 'datasources.test.json';
+
+    config = getFile(envFile);
 } catch (e) {
     if (e.code == 'MODULE_NOT_FOUND')
-        config = require(configPath);
+        config = getFile(defaultFile);
 }
 
 config.proxy = require('../../nginx/config.json');
diff --git a/services/print/application/config/datasources.test.json b/services/print/application/config/datasources.test.json
index 92965aa5a..d51ae1fa2 100644
--- a/services/print/application/config/datasources.test.json
+++ b/services/print/application/config/datasources.test.json
@@ -7,9 +7,9 @@
     "mysql": {
         "host": "localhost",
         "port": 3306,
-        "user": "reports",
+        "user": "root",
         "password": "",
-        "database": ""
+        "database": "vn"
     },
     "pdf": {
         "footer": {