I'm a rails turotial student,
Chapter 7
7.3.4 Test at failure
The bundle exec rake test did not succeed and the test did not proceed.
Is it because of a place that doesn't stop if it is moving normally?
If i am searching for a person who has the same symptom, you may not be able to find it.

I would appreciate any professor.

ERROR ["test_invalid_signup_information", UsersSignupTest, 0.425589790000231]
 test_invalid_signup_information # UsersSignupTest (0.43s)
NameError: NameError: undefined local variable or method `user 'for #<UsersSignupTest: 0x00000000061a7998>
        Did you mean? Users
            test/integration/users_signup_test.rb: 7: in `block in<class: UsersSignupTest>'
            test/integration/users_signup_test.rb: 7: in `block in<class: UsersSignupTest>'
 FAIL ["test_email_validation_should_reject_invalid_addresses", UserTest, 0.6627793839998048]
 test_email_validation_should_reject_invalid_addresses # UserTest (0.66s)
        "user @ example, com" should be invalid
        test/models/user_test.rb: 34: in `block (2 levels) in<class: UserTest>'
        test/models/user_test.rb: 32: in `each '
        test/models/user_test.rb: 32: in `block in<class: UserTest>'
  16/16: [=================================] 100% Time: 00:00:00, Time : 00:00:00
Finished in 0.67250s
16 tests, 30 assertions, 1 failures, 1 errors, 0 skips

In the test/integration/users_signup_test.rb file

require 'test_helper'
class UsersSignupTest