Add user roles relation test

app/Entities/Users/User.php

@@ -49,6 +49,19 @@ class User extends Authenticatable
     }
 
     /**
+     * Remove the given role from the user.
+     *
+     * @param  string $role
+     * @return mixed
+     */
+    public function removeRole($role)
+    {
+        return $this->roles()->detach(
+            Role::whereName($role)->firstOrFail()
+        );
+    }
+
+    /**
      * Determine if the user has the given role.
      *
      * @param  mixed $role

tests/Unit/Models/UserTest.php

@@ -16,4 +16,46 @@ class UserTest extends TestCase
             'target' => '_blank'
         ]), $user->nameLink());
     }
+
+    /** @test */
+    public function it_can_assigned_to_a_role()
+    {
+        $user = factory(User::class)->create();
+        $user->assignRole('admin');
+
+        $this->assertTrue($user->hasRole('admin'));
+    }
+
+    /** @test */
+    public function it_has_many_roles()
+    {
+        $user = factory(User::class)->create();
+        $user->assignRole('admin');
+        $user->assignRole('worker');
+
+        $this->assertTrue($user->hasRoles(['admin', 'worker']));
+    }
+
+    /** @test */
+    public function it_can_be_removed_from_a_role()
+    {
+        $user = factory(User::class)->create();
+        $user->assignRole('admin');
+        $user->assignRole('worker');
+
+        $this->assertTrue($user->hasRoles(['admin', 'worker']));
+
+        $user->removeRole('worker');
+        $this->assertFalse($user->fresh()->hasRole('worker'));
+    }
+
+    /** @test */
+    public function it_can_queried_by_roles()
+    {
+        $user = factory(User::class)->create();
+        $user->assignRole('vendor');
+        $user->assignRole('worker');
+
+        $this->assertCount(1, User::orderBy('name')->hasRoles(['vendor', 'worker'])->get());
+    }
 }