🥗 Journal: Writing Entries: Test adding Entry#summary

- zinc-collective#2
- zinc-collective#6
- zinc-collective#4

Clearly, when I started
zinc-collective#8 I used the
wrong name. It's not an `Entry#description`, it's an `Entry#summary`!

Perhaps that would have been more obvious had I started with the spec,
rather than the data model. Ah well, inside out and outside in are both
valid.

spec/furniture/journal/writing_entries_system_spec.rb

@@ -0,0 +1,25 @@
+require "rails_helper"
+
+# @see https://github.com/zinc-collective/convene-journal/issues/2
+RSpec.describe "Writing Entries", type: :system do
+  let(:space) { create(:space, :with_entrance, :with_members) }
+  let(:journal) { create(:journal, room: space.entrance) }
+
+  before do
+    sign_in(space.members.first, space)
+  end
+
+  it "Entries have a customizable feed-forward summary for browsing, search and sharing" do
+    visit(polymorphic_path(journal.location(:new, child: :entry)))
+
+    fill_in("Body", with: 1000.times.map { Faker::Books::Dune.quote }.join("\r\n\r\n"))
+    summary = %(
+      So you thought you wanted 1000 Dune Quotes?
+      Well, you were wrong. But here they are anyway!
+    )
+    fill_in("Summary", with: summary)
+
+    visit(polymorphic_path(space.entrance.location))
+    expect(page).to have_content("Summary")
+  end
+end