Add snowplow schema spec

ee/spec/lib/gitlab/tracking/snowplow_schema_validation_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Snowplow Schema Validation' do
+  context 'snowplow events definition' do
+    shared_examples 'matches schema' do
+      it 'conforms schema json' do
+        paths = Dir[Rails.root.join(yaml_path)]
+
+        events = paths.each_with_object([]) do |path, metrics|
+          metrics.push(
+            YAML.safe_load(File.read(path), aliases: true)
+          )
+        end
+
+        expect(events).to all match_schema(Rails.root.join('config/events/schema.json'))
+      end
+    end
+
+    describe 'matches the schema for EE' do
+      let(:yaml_path) { 'ee/config/events/*.yml' }
+
+      it_behaves_like 'matches schema'
+    end
+  end
+end

spec/lib/gitlab/tracking/snowplow_schema_validation_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Snowplow Schema Validation' do
+  context 'snowplow events definition' do
+    shared_examples 'matches schema' do
+      it 'conforms schema json' do
+        paths = Dir[Rails.root.join(yaml_path)]
+
+        events = paths.each_with_object([]) do |path, metrics|
+          metrics.push(
+            YAML.safe_load(File.read(path), aliases: true)
+          )
+        end
+
+        expect(events).to all match_schema(Rails.root.join('config/events/schema.json'))
+      end
+    end
+
+    describe 'matches the schema for CE' do
+      let(:yaml_path) { 'config/events/*.yml' }
+
+      it_behaves_like 'matches schema'
+    end
+
+    describe 'matches the schema for EE' do
+      let(:yaml_path) { 'ee/config/events/*.yml' }
+
+      it_behaves_like 'matches schema'
+    end
+  end
+end