Add coverage for Followups and Mileages reports

Followup report handle CSV exports with
authorization and the Mileage report handles
Reimbursement CSV exports. Both have placeholder
specs only.

Let's add coverage to ensure they work as
expected and no bugs are introduced.

The services that generate the report data have
extensive coverage already, so keep this unit test
focused on the request, I only tested for the format
and the headers.

Author: stefannibrasil

app/controllers/followup_reports_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class FollowupReportsController < ApplicationController
   after_action :verify_authorized
 

app/controllers/mileage_reports_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "csv"
 
 class MileageReportsController < ApplicationController

spec/controllers/followup_reports_controller_spec.rb

@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe "FollowupReports", type: :request do
+  describe "GET /index" do
+    context "when the user has access" do
+      let(:admin) { build(:casa_admin) }
+
+      it "returns the CSV report" do
+        sign_in admin
+
+        get followup_reports_path(format: :csv)
+
+        expect(response).to have_http_status(:success)
+        expect(response.header["Content-Type"]).to eq("text/csv")
+        expect(response.headers["Content-Disposition"]).to(
+          match("followup-report-#{Time.current.strftime("%Y-%m-%d")}.csv")
+        )
+      end
+
+      it "adds the correct headers to the csv" do
+        sign_in admin
+
+        get followup_reports_path(format: :csv)
+
+        csv_headers = [
+          "Case Number",
+          "Volunteer Name(s)",
+          "Note Creator Name",
+          "Note"
+        ]
+
+        csv_headers.each { |header| expect(response.body).to include(header) }
+      end
+    end
+
+    context "when the user is not authorized to access" do
+      it "redirects to root and displays an unauthorized message" do
+        volunteer = build(:volunteer)
+        sign_in volunteer
+
+        get followup_reports_path(format: :csv)
+
+        expect(response).to redirect_to root_path
+        expect(response.request.flash[:notice]).to eq "Sorry, you are not authorized to perform this action."
+      end
+    end
+  end
+end

spec/controllers/mileage_reports_controller_spec.rb

@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe "MileageReports", type: :request do
+  describe "GET /index" do
+    context "when the user has access" do
+      let(:admin) { build(:casa_admin) }
+
+      it "returns the CSV report" do
+        sign_in admin
+
+        get mileage_reports_path(format: :csv)
+
+        expect(response).to have_http_status(:success)
+        expect(response.header["Content-Type"]).to eq("text/csv")
+        expect(response.headers["Content-Disposition"]).to(
+          match("mileage-report-#{Time.current.strftime("%Y-%m-%d")}.csv")
+        )
+      end
+
+      it "adds the correct headers to the csv" do
+        sign_in admin
+
+        get mileage_reports_path(format: :csv)
+
+        csv_headers = [
+          "Contact Types",
+          "Occurred At",
+          "Miles Driven",
+          "Casa Case Number",
+          "Creator Name",
+          "Supervisor Name",
+          "Volunteer Address",
+          "Reimbursed"
+        ]
+
+        csv_headers.each { |header| expect(response.body).to include(header) }
+      end
+    end
+
+    context "when the user is not authorized to access" do
+      it "redirects to root and displays an unauthorized message" do
+        volunteer = build(:volunteer)
+        sign_in volunteer
+
+        get mileage_reports_path(format: :csv)
+
+        expect(response).to redirect_to root_path
+        expect(response.request.flash[:notice]).to eq "Sorry, you are not authorized to perform this action."
+      end
+    end
+  end
+end