diff --git a/backend/spec/controllers/api/v1/posts_controller_spec.rb b/backend/spec/controllers/api/v1/posts_controller_spec.rb
index 083526ce..cf1b434b 100644
--- a/backend/spec/controllers/api/v1/posts_controller_spec.rb
+++ b/backend/spec/controllers/api/v1/posts_controller_spec.rb
@@ -13,5 +13,28 @@
       get :index
       expect(response_body[:posts].size).to eq 2
     end
+
+    it "returns a list of discussion posts filtered by post type" do
+      post = create(:post, user_id: user.id)
+      create(:post, user_id: other_user.id)
+      symptom = post.symptom_ids
+
+      get :index, params: {id: symptom[0], type: "symptom"}
+
+      expect(response_body[:posts].size).to eq 1
+    end
+
+    it "returns a list of discussion posts filtered by topic followings" do
+      post = create(:post, user_id: user.id)
+      create(:post, user_id: user.id)
+      create(:post, user_id: user.id)
+      topic_user_is_following = user.topic_following
+      topic_user_is_following.symptom_ids = post.symptom_ids
+      topic_user_is_following.save
+
+      get :index, params: {following: true}
+
+      expect(response_body[:posts].size).to eq 1
+    end
   end
 end
diff --git a/backend/spec/factories/patterns.rb b/backend/spec/factories/patterns.rb
new file mode 100644
index 00000000..bd9e60d8
--- /dev/null
+++ b/backend/spec/factories/patterns.rb
@@ -0,0 +1,8 @@
+FactoryBot.define do
+  factory :pattern do
+    encrypted_user_id { create(:user).encrypted_id }
+    start_at { Time.zone.now }
+    end_at { 2.days.from_now }
+    name { "Chuck Norris" }
+  end
+end
diff --git a/backend/spec/models/ranked_enum_spec.rb b/backend/spec/models/ranked_enum_spec.rb
new file mode 100644
index 00000000..59ac9e46
--- /dev/null
+++ b/backend/spec/models/ranked_enum_spec.rb
@@ -0,0 +1,50 @@
+require "rails_helper"
+
+class MockClassSkeleton < RankedEnum
+end
+
+class MockClassOverride < RankedEnum
+  class << self
+    def all_ids
+      %w[one two three]
+    end
+  end
+end
+
+RSpec.describe RankedEnum do
+  describe MockClassSkeleton do
+    it "yields all IDs associated with the class" do
+      all_ids = MockClassSkeleton.all_ids
+
+      expect(all_ids).to eq []
+    end
+  end
+
+  describe MockClassOverride do
+    it "yields all IDs associated with the class" do
+      all_ids = MockClassOverride.all_ids
+
+      expect(all_ids).to eq ["one", "two", "three"]
+    end
+
+    it "searches for a specific ID" do
+      searched_id = MockClassOverride.find("two")
+
+      expect(searched_id.id).to eq "two"
+    end
+
+    # TODO: Actually make this test grab the cache
+    it "prints out all IDs from cache" do
+      all_ids = MockClassOverride.all
+
+      expect(all_ids.size).to eq 3
+      expect(all_ids.last.id).to eq "three"
+    end
+
+    it "creates a translatable name (that does not exist in the code base) for a ranked enum model instance" do
+      mock = MockClassOverride.new("some-id", "some-rank")
+
+      expect(mock.name).to eq "Translation missing: en.mock_class_override.some-id"
+    end
+  end
+end
diff --git a/backend/spec/services/charts_pattern_spec.rb b/backend/spec/services/charts_pattern_spec.rb
new file mode 100644
index 00000000..b78ed307
--- /dev/null
+++ b/backend/spec/services/charts_pattern_spec.rb
@@ -0,0 +1,45 @@
+require "rails_helper"
+
+RSpec.describe ChartsPattern do
+  it "instantiates a ChartPattern instance" do
+    user = create(:user)
+    pattern = create(:pattern, encrypted_user_id: user.encrypted_id)
+
+    chart_pattern = ChartsPattern.new({start_at: pattern.start_at, end_at: pattern.end_at, pattern: pattern})
+
+    expect(chart_pattern.pattern.id).to eq pattern.id
+  end
+
+  it "generates chart data from a ChartPattern" do
+    user = create(:user)
+    pattern = create(:pattern, encrypted_user_id: user.encrypted_id)
+
+    chart_pattern = ChartsPattern.new({start_at: pattern.start_at, end_at: pattern.end_at, pattern: pattern})
+    chart_data = chart_pattern.chart_data
+
+    expect(chart_data[:pattern_name]).to eq pattern.name
+    expect(chart_data[:author_email]).to eq user.email
+  end
+
+  it "generates chart data from a ChartPattern with a valid category" do
+    user = create(:user)
+    pattern = create(:pattern, encrypted_user_id: user.encrypted_id, includes: [{category: "treatments"}])
+
+    chart_pattern = ChartsPattern.new({start_at: pattern.start_at, end_at: pattern.end_at, pattern: pattern})
+    chart_data = chart_pattern.chart_data
+
+    expect(chart_data[:pattern_name]).to eq pattern.name
+    expect(chart_data[:author_email]).to eq user.email
+  end
+
+  it "generates chart data from a ChartPattern with untracked category" do
+    user = create(:user)
+    pattern = create(:pattern, encrypted_user_id: user.encrypted_id, includes: [{category: "not-a-category"}])
+
+    chart_pattern = ChartsPattern.new({start_at: pattern.start_at, end_at: pattern.end_at, pattern: pattern})
+    chart_data = chart_pattern.chart_data
+
+    expect(chart_data[:pattern_name]).to eq pattern.name
+    expect(chart_data[:author_email]).to eq user.email
+  end
+end