Adds a Default Color Hex Value to the Admin Tags Color Field (#11105) [deploy]

* Adds a default color hex value to the /admin/tags/show color picker

* Rebased against color-picker changes and adds default color to edit.html.erb

* Adds a system spec for admin/tags and adjusts the filename for admin_creates_new_page_spec

* Uses .blank? in place of .nil? in admin/tags/show.html.erb

* Refactors test in admin_updates_tag_spec.rb

app/views/admin/tags/show.html.erb

@@ -86,7 +86,7 @@
       </div>
       <div class="form-group">
         <%= f.label :text_color_hex %>
-        <%= f.color_field :text_color_hex, class: "form-control", required: true %>
+        <%= f.color_field :text_color_hex, class: "form-control", required: true, value: @tag.text_color_hex.presence || "#ffffff" %>
       </div>
       <%= f.submit class: "btn btn-primary float-right" %>
     <% end %>

spec/system/admin/admin_updates_tag_spec.rb

@@ -0,0 +1,38 @@
+require "rails_helper"
+
+RSpec.describe "Admin updates a tag", type: :system do
+  let(:super_admin) { create(:user, :super_admin) }
+  let(:tag) { create(:tag) }
+
+  context "when no colors have been choosen for the tag" do
+    before do
+      sign_in super_admin
+      visit "/admin/tags/#{tag.id}"
+    end
+
+    it "defaults to white text for the color picker" do
+      expect(page).to have_field("tag_text_color_hex", with: "#ffffff")
+    end
+
+    it "defaults to black and white upon update" do
+      check "Supported"
+      click_button("Update Tag")
+      tag.reload
+      expect(tag.bg_color_hex).to eq("#000000")
+      expect(tag.text_color_hex).to eq("#ffffff")
+    end
+  end
+
+  context "when colors have already been choosen for the tag" do
+    before do
+      sign_in super_admin
+      visit "/admin/tags/#{tag.id}"
+    end
+
+    it "remains the same color it was unless otherwise updated via the color picker" do
+      click_button("Update Tag")
+      expect(tag.bg_color_hex).to eq(tag.bg_color_hex)
+      expect(tag.text_color_hex).to eq(tag.text_color_hex)
+    end
+  end
+end