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# frozen_string_literal: true
require 'spec_helper'
describe PerformanceMonitoring::PrometheusPanel do
let(:json_content) do
{
"max_value" => 1,
"type" => "area-chart",
"title" => "Chart Title",
"y_label" => "Y-Axis",
"weight" => 1,
"metrics" => [{
"id" => "metric_of_ages",
"unit" => "count",
"label" => "Metric of Ages",
"query_range" => "http_requests_total"
}]
}
end
describe '#new' do
it 'accepts old schema format' do
expect { described_class.new(json_content) }.not_to raise_error
end
it 'accepts new schema format' do
expect { described_class.new(json_content.merge("y_axis" => { "precision" => 0 })) }.not_to raise_error
end
end
describe '.from_json' do
subject { described_class.from_json(json_content) }
it 'creates a PrometheusPanelGroup object' do
expect(subject).to be_a PerformanceMonitoring::PrometheusPanel
expect(subject.type).to eq(json_content['type'])
expect(subject.title).to eq(json_content['title'])
expect(subject.y_label).to eq(json_content['y_label'])
expect(subject.weight).to eq(json_content['weight'])
expect(subject.metrics).to all(be_a PerformanceMonitoring::PrometheusMetric)
end
describe 'validations' do
context 'json_content is not a hash' do
let(:json_content) { nil }
subject { described_class.from_json(json_content) }
it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
end
context 'when title is missing' do
before do
json_content['title'] = nil
end
subject { described_class.from_json(json_content) }
it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
end
context 'when metrics are missing' do
before do
json_content.delete('metrics')
end
subject { described_class.from_json(json_content) }
it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
end
end
end
describe '.id' do
it 'returns hexdigest of group_title, type and title as the panel id' do
group_title = 'Business Group'
panel_type = 'area-chart'
panel_title = 'New feature requests made'
expect(Digest::SHA2).to receive(:hexdigest).with("#{group_title}#{panel_type}#{panel_title}").and_return('hexdigest')
expect(described_class.new(title: panel_title, type: panel_type).id(group_title)).to eql 'hexdigest'
end
end
end
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