Railsテストにて Expected: 1Actual: 0,Expected: 2Actual: 0というFailureが解決できない

cloud9にてrails testを実行するとFollowingTest#test_should_send_follow_notification_email [/home/ubuntu/workspace/environment/sample_app/test/integration/following_test.rb:65]:Expected: 1Actual: 0
FollowingTest#test_should_send_unfollow_notification_email [/home/ubuntu/workspace/environment/sample_app/test/integration/following_test.rb:78]:Expected: 2Actual: 0というFailureが発生しているのですが、下名のスキル不足のため解決できません。お手数ですが、アドバイスをよろしくお願いします。

[ソースコード]

ruby
1---following_test.rb---
2
3require 'test_helper'
4
5class FollowingTest < ActionDispatch::IntegrationTest
6  
7  def setup
8    @user=users(:michael)
9    @other = users(:archer)
10    log_in_as(@user)
11  end
12  
13  test "following page" do
14    get following_user_path(@user)
15    assert_not @user.following.empty?
16    assert_match @user.following.count.to_s,response.body
17    @user.following.each do |user|
18      assert_select "a[href=?]",user_path(user)
19    end
20  end
21  
22  test "followers page" do
23    get followers_user_path(@user)
24    assert_not @user.followers.empty?
25    assert_match @user.followers.count.to_s,response.body
26    @user.followers.each do |user|
27      assert_select "a[href=?]",user_path(user)
28  end
29 end
30 
31  test "should follow a user the standard way" do
32    assert_difference '@user.following.count', 1 do
33      post relationships_path, params: { followed_id: @other.id }
34    end
35  end
36
37  test "should follow a user with Ajax" do
38    assert_difference '@user.following.count', 1 do
39      post relationships_path, xhr: true, params: { followed_id: @other.id }
40    end
41  end
42
43  test "should unfollow a user the standard way" do
44    @user.follow(@other)
45    relationship = @user.active_relationships.find_by(followed_id: @other.id)
46    assert_difference '@user.following.count', -1 do
47      delete relationship_path(relationship)
48    end
49  end
50
51  test "should unfollow a user with Ajax" do
52    @user.follow(@other)
53    relationship = @user.active_relationships.find_by(followed_id: @other.id)
54    assert_difference '@user.following.count', -1 do
55      delete relationship_path(relationship), xhr: true
56    end
57  end
58  
59  test "feed on Home page" do
60    get root_path
61    @user.feed.paginate(page: 1).each do |micropost|
62      assert_match CGI.escapeHTML(micropost.content), response.body
63    end
64  end
65 test "should send follow notification email" do
66    post relationships_path, params: {followed_id: @other.id}
67    assert_equal 1, ActionMailer::Base.deliveries.size
68  end
69
70  test "should not send follow notification email" do
71    not_notify = users(:hogehoge)
72    post relationships_path, params: {followed_id: not_notify.id}
73    assert_equal 0, ActionMailer::Base.deliveries.size
74  end
75
76  test "should send unfollow notification email" do
77    @user.follow(@other)
78    relationship = @user.active_relationships.find_by(followed_id: @other.id)
79    delete relationship_path(relationship)
80    assert_equal 2, ActionMailer::Base.deliveries.size # follow email and unfollow email
81  end
82
83  test "should not send unfollow notification email" do
84    not_notify = users(:hogehoge)
85    @user.follow(not_notify)
86    relationship = @user.active_relationships.find_by(followed_id: not_notify.id)
87    delete relationship_path(relationship)
88    assert_equal 0, ActionMailer::Base.deliveries.size
89  end
90end
91
92

[試したこと]
assert_equal 1, ActionMailer::Base.deliveries.size,
assert_equal 2, ActionMailer::Base.deliveries.sizeの所でエラーが起
きているので、ネット上にあるQ&Aを見るとフォローユーザーを設定できていないため発生するとういうことでしたので、followユーザーの登録や設定の見直しを行いましたが、Failureが発生します。