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require 'spec_helper'
describe Gitlab::Metrics do
describe '.settings' do
it 'returns a Hash' do
expect(described_class.settings).to be_an_instance_of(Hash)
end
end
describe '.enabled?' do
it 'returns a boolean' do
expect([true, false].include?(described_class.enabled?)).to eq(true)
end
end
describe '.last_relative_application_frame' do
it 'returns an Array containing a file path and line number' do
file, line = described_class.last_relative_application_frame
expect(line).to eq(__LINE__ - 2)
expect(file).to eq('spec/lib/gitlab/metrics_spec.rb')
end
end
describe '#submit_metrics' do
it 'prepares and writes the metrics to InfluxDB' do
connection = double(:connection)
pool = double(:pool)
expect(pool).to receive(:with).and_yield(connection)
expect(connection).to receive(:write_points).with(an_instance_of(Array))
expect(Gitlab::Metrics).to receive(:pool).and_return(pool)
described_class.submit_metrics([{ 'series' => 'kittens', 'tags' => {} }])
end
end
describe '#prepare_metrics' do
it 'returns a Hash with the keys as Symbols' do
metrics = described_class.
prepare_metrics([{ 'values' => {}, 'tags' => {} }])
expect(metrics).to eq([{ values: {}, tags: {} }])
end
it 'escapes tag values' do
metrics = described_class.prepare_metrics([
{ 'values' => {}, 'tags' => { 'foo' => 'bar=' } }
])
expect(metrics).to eq([{ values: {}, tags: { 'foo' => 'bar\\=' } }])
end
it 'drops empty tags' do
metrics = described_class.prepare_metrics([
{ 'values' => {}, 'tags' => { 'cats' => '', 'dogs' => nil } }
])
expect(metrics).to eq([{ values: {}, tags: {} }])
end
end
describe '#escape_value' do
it 'escapes an equals sign' do
expect(described_class.escape_value('foo=')).to eq('foo\\=')
end
it 'casts values to Strings' do
expect(described_class.escape_value(10)).to eq('10')
end
end
end
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