Add model tests for `Appendable::Reaction`

spec/models/appendable/reaction_spec.rb

@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe Appendable::Reaction do
+  let(:user) { FactoryBot.create(:user) }
+  let(:owner) { FactoryBot.create(:user) }
+  let(:parent) { FactoryBot.create(:answer, user: owner) }
+
+  before do
+    subject.content = "🙂"
+    subject.parent = parent
+    subject.user = user
+  end
+
+  describe "associations" do
+    it { should belong_to(:user) }
+    it { should belong_to(:parent) }
+  end
+
+  describe "after_create" do
+    context "owner is subscribed to the parent" do
+      before do
+        Subscription.subscribe(owner, parent)
+      end
+
+      it "should notify the parent's author" do
+        expect { subject.save }.to change { owner.notifications.count }.by(1)
+      end
+    end
+
+    it "should increment the user's smiled count" do
+      expect { subject.save }.to change { user.smiled_count }.by(1)
+    end
+
+    it "should increment the parent's smiled count" do
+      expect { subject.save }.to change { parent.smile_count }.by(1)
+    end
+  end
+
+  describe "before_destroy" do
+    context "owner has a notification for this reaction" do
+      before do
+        subject.save
+        Notification.notify(owner, subject)
+      end
+
+      it "should denotify the parent's author" do
+        expect { subject.destroy }.to change { owner.notifications.count }.by(-1)
+      end
+    end
+
+    it "should reduce the user's smiled count" do
+      expect { subject.destroy }.to change { user.smiled_count }.by(-1)
+    end
+
+    it "should reduce the parent's smiled count" do
+      expect { subject.destroy }.to change { parent.smile_count }.by(-1)
+    end
+  end
+end