Test production/development fixtures seed

spec/db/development/import_common_metrics_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Import metrics on development seed' do
+  subject { load Rails.root.join('db', 'fixtures', 'development', '99_common_metrics.rb') }
+
+  it "imports all prometheus metrics" do
+    expect(PrometheusMetric.common).to be_empty
+
+    subject
+
+    expect(PrometheusMetric.common).not_to be_empty
+  end
+end

spec/db/production/import_common_metrics_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Import metrics on production seed' do
+  subject { load Rails.root.join('db', 'fixtures', 'production', '999_common_metrics.rb') }
+
+  it "imports all prometheus metrics" do
+    expect(PrometheusMetric.common).to be_empty
+
+    subject
+
+    expect(PrometheusMetric.common).not_to be_empty
+  end
+end