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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::DatabaseImporters::CommonMetrics::Importer do
subject { described_class.new }
context "does import common_metrics.yml" do
let(:groups) { subject.content['panel_groups'] }
let(:panels) { groups.flat_map { |group| group['panels'] } }
let(:metrics) { panels.flat_map { |group| group['metrics'] } }
let(:metric_ids) { metrics.map { |metric| metric['id'] } }
before do
subject.execute
end
it "has the same amount of groups" do
expect(PrometheusMetric.common.group(:group).count.count).to eq(groups.count)
end
it "has the same amount of panels" do
expect(PrometheusMetric.common.group(:group, :title).count.count).to eq(panels.count)
end
it "has the same amount of metrics" do
expect(PrometheusMetric.common.count).to eq(metrics.count)
end
it "does not have duplicate IDs" do
expect(metric_ids).to eq(metric_ids.uniq)
end
it "imports all IDs" do
expect(PrometheusMetric.common.pluck(:identifier)).to contain_exactly(*metric_ids)
end
end
context "does import common_metrics.yml" do
it "when executed from outside of the Rails.root" do
Dir.chdir(Dir.tmpdir) do
expect { subject.execute }.not_to raise_error
end
expect(PrometheusMetric.common).not_to be_empty
end
end
context 'does import properly all fields' do
let(:query_identifier) { 'response-metric' }
let(:dashboard) do
{
panel_groups: [{
group: 'Response metrics (NGINX Ingress)',
panels: [{
title: "Throughput",
y_label: "Requests / Sec",
metrics: [{
id: query_identifier,
query_range: 'my-query',
unit: 'my-unit',
label: 'status code'
}]
}]
}]
}
end
before do
expect(subject).to receive(:content) { dashboard.deep_stringify_keys }
end
shared_examples 'stores metric' do
let(:metric) { PrometheusMetric.find_by(identifier: query_identifier) }
it 'with all data' do
expect(metric.group).to eq('nginx_ingress')
expect(metric.title).to eq('Throughput')
expect(metric.y_label).to eq('Requests / Sec')
expect(metric.unit).to eq('my-unit')
expect(metric.legend).to eq('status code')
expect(metric.query).to eq('my-query')
end
end
context 'if ID is missing' do
let(:query_identifier) {}
it 'raises exception' do
expect { subject.execute }.to raise_error(Gitlab::DatabaseImporters::CommonMetrics::Importer::MissingQueryId)
end
end
context 'for existing common metric with different ID' do
let!(:existing_metric) { create(:prometheus_metric, :common, identifier: 'my-existing-metric') }
before do
subject.execute
end
it_behaves_like 'stores metric' do
it 'and existing metric is not changed' do
expect(metric).not_to eq(existing_metric)
end
end
end
context 'when metric with ID exists ' do
let!(:existing_metric) { create(:prometheus_metric, :common, identifier: 'response-metric') }
before do
subject.execute
end
it_behaves_like 'stores metric' do
it 'and existing metric is changed' do
expect(metric).to eq(existing_metric)
end
end
end
end
end
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