Add Submit Button to Integrations Tab (#2863)

* Add Submit Button to Integrations Tab

Was just browsing around dev.to and realized there wasn't a submit
button on this page, so I added one!

I tried to get a system spec stood up but ran into issues with hitting
the GitHub API that wasn't mocked out. I didn't spend enough time
getting the correct mocking to work, but I might try to get that pushed
up too.

* Get the mocking working with a sample repo

* Rewrite some of the rspec contexts

app/views/users/_integrations.html.erb

@@ -15,4 +15,6 @@
   </div>
   <p><em>Add your Twitch username, and then checkout <a href="/live/<%= @user.username %>">dev.to/live/<%= @user.username %></a>.</em></p>
   <p><em>It's a new thing we're trying out. Soon we'll be able to indicate when any community member is currently streaming.</em></p>
+
+  <%= f.submit "SUBMIT", class: "cta" %>
 <% end %>

spec/system/user/user_edits_integrations_spec.rb

@@ -0,0 +1,37 @@
+require "rails_helper"
+
+RSpec.describe "User edits their integrations", type: :system, js: true do
+  let(:user) { create(:user, saw_onboarding: true) }
+  let(:github_response_body) do
+    [
+      {
+        "id" => 1_296_269,
+        "node_id" => "MDEwOlJlcG9zaXRvcnkxMjk2MjY5",
+        "name" => "Hello-World",
+        "full_name" => "octocat/Hello-World"
+      },
+    ]
+  end
+
+  before do
+    sign_in user
+    stub_request(:get, "https://api.github.com/user/repos?per_page=100").to_return(status: 200, body: github_response_body.to_json, headers: { "Content-Type" => "application/json" })
+  end
+
+  describe "via visiting /settings" do
+    it "and sets a Twitch Username" do
+      visit "/settings"
+      expect(page).to have_current_path("/settings")
+
+      click_link "Integrations"
+
+      fill_in "Twitch Username", with: "TestTwitchUser"
+      click_button("SUBMIT")
+
+      expect(page).to have_content "Your profile was successfully updated."
+
+      click_link "Integrations"
+      expect(find_field("Twitch Username").value).to eq "TestTwitchUser"
+    end
+  end
+end