Adds Logout Test

This commit revises the error catching capabilities of the logout method. This commit also adds a test to this functionality.

Signed-off-by: Lui de la Parra <[email protected]>

Author: Luidog

src/client.model.js

@@ -262,7 +262,7 @@ class Client extends Document {
               .then(body => this.connection.remove(body))
               .then(body => this._saveState(body))
               .then(body => resolve(body.messages[0]))
-              .catch(error => reject(error))
+              .catch(error => reject(error.response.data.messages[0]))
           : reject({ message: 'No session to log out.' })
     );
   }

tests/authentication.test.js

@@ -86,7 +86,22 @@ describe('Authentication Capabilities', () => {
       .that.has.all.keys('message');
   });
 
-  it('reject if the authentication request fails', () => {
+  it('should reject if the logout request fails', () => {
+    return expect(
+      client
+        .authenticate()
+        .then(token => {
+          client.connection.token = 'invalid';
+          return client;
+        })
+        .then(client => client.logout())
+        .catch(error => error)
+    )
+      .to.eventually.be.a('object')
+      .that.has.all.keys('code', 'message');
+  });
+
+  it('should reject if the authentication request fails', () => {
     client.connection.credentials.password = 'incorrect';
     return expect(
       client