1 files changed, 79 insertions, 0 deletions
diff --git a/spec/lib/gitlab/usage/docs/helper_spec.rb b/spec/lib/gitlab/usage/docs/helper_spec.rb
new file mode 100644
index 00000000000..e2bb1d8d818
--- /dev/null
+++ b/spec/lib/gitlab/usage/docs/helper_spec.rb
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Usage::Docs::Helper do
+  subject(:helper) { klass.new }
+
+  let_it_be(:klass) do
+    Class.new do
+      include Gitlab::Usage::Docs::Helper
+    end
+  end
+
+  let(:metric_definition) do
+    {
+      data_category: 'Standard',
+      name: 'test_metric',
+      description: description,
+      product_group: 'group::product intelligence',
+      status: 'data_available',
+      tier: %w(free premium)
+    }
+  end
+
+  let(:description) { 'Metric description' }
+
+  describe '#render_name' do
+    it { expect(helper.render_name(metric_definition[:name])).to eq('### `test_metric`') }
+  end
+
+  describe '#render_description' do
+    context 'without description' do
+      let(:description) { nil }
+
+      it { expect(helper.render_description(metric_definition)).to eq('Missing description') }
+    end
+
+    context 'without description' do
+      it { expect(helper.render_description(metric_definition)).to eq('Metric description') }
+    end
+  end
+
+  describe '#render_yaml_link' do
+    let(:yaml_link) { 'config/metrics/license/test_metric.yml' }
+    let(:expected) { "[YAML definition](#{yaml_link})" }
+
+    it { expect(helper.render_yaml_link(yaml_link)).to eq(expected) }
+  end
+
+  describe '#render_status' do
+    let(:expected) { "Status: `data_available`" }
+
+    it { expect(helper.render_status(metric_definition)).to eq(expected) }
+  end
+
+  describe '#render_owner' do
+    let(:expected) { "Group: `group::product intelligence`" }
+
+    it { expect(helper.render_owner(metric_definition)).to eq(expected) }
+  end
+
+  describe '#render_tiers' do
+    let(:expected) { "Tiers: `free`, `premium`" }
+
+    it { expect(helper.render_tiers(metric_definition)).to eq(expected) }
+  end
+
+  describe '#render_data_category' do
+    let(:expected) { 'Data Category: `Standard`' }
+
+    it { expect(helper.render_data_category(metric_definition)).to eq(expected) }
+  end
+
+  describe '#render_owner' do
+    let(:expected) { "Group: `group::product intelligence`" }
+
+    it { expect(helper.render_owner(metric_definition)).to eq(expected) }
+  end
+end