Add test for `Exporter#publish`

lib/exporter.rb

@@ -133,11 +133,11 @@ class Exporter
   end
 
   def publish
-    `tar czvf #{Rails.root.join "public", "export", "#{@export_filename}.tar.gz"} -C /tmp/rs_export #{@export_dirname}`
-    url = "#{APP_CONFIG[:https] ? 'https' : 'http'}://#{APP_CONFIG[:hostname]}/export/#{@export_filename}"
+    `tar czvf #{Rails.root.join "public", "export", @export_filename} -C /tmp/rs_export #{@export_dirname}`
+    url = "#{APP_CONFIG['https'] ? 'https' : 'http'}://#{APP_CONFIG['hostname']}/export/#{@export_filename}"
     @user.export_processing = false
     @user.export_url = url
-    @user.export_created_at = Time.now
+    @user.export_created_at = Time.now.utc
     @user.save validate: false
     url
   end

spec/lib/exporter_spec.rb

@@ -227,6 +227,10 @@ RSpec.describe Exporter do
       allow(Rails).to receive(:root).and_return(fake_rails_root)
     end
 
+    after do
+      FileUtils.rm_r(fake_rails_root)
+    end
+
     subject { instance.send(:finalize) }
 
     context "exporting a user without a profile picture or header" do
@@ -287,4 +291,33 @@ RSpec.describe Exporter do
       end
     end
   end
+
+  describe "#publish" do
+    let(:fake_rails_root) { Pathname(Dir.mktmpdir) }
+    let(:name) { instance.instance_variable_get(:@export_filename) }
+
+    before do
+      FileUtils.mkdir_p("#{fake_rails_root}/public/export")
+      allow(Rails).to receive(:root).and_return(fake_rails_root)
+
+      user.export_processing = true
+      user.save!
+    end
+
+    after do
+      FileUtils.rm_r(fake_rails_root)
+    end
+
+    subject { instance.send(:publish) }
+
+    it "publishes an archive" do
+      Timecop.freeze do
+        expect { subject }.to change { user.export_processing }.from(true).to(false)
+        expect(File.exist?("#{fake_rails_root}/public/export/#{name}")).to eq(true)
+        expect(user.export_url).to eq("https://example.com/export/#{name}")
+        expect(user.export_created_at).to eq(Time.now.utc)
+        expect(user).to be_persisted
+      end
+    end
+  end
 end