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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 '.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(described_class).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
describe '.measure' do
context 'without a transaction' do
it 'returns the return value of the block' do
val = described_class.measure(:foo) { 10 }
expect(val).to eq(10)
end
end
context 'with a transaction' do
let(:transaction) { Gitlab::Metrics::Transaction.new }
before do
allow(described_class).to receive(:current_transaction).
and_return(transaction)
end
it 'adds a metric to the current transaction' do
expect(transaction).to receive(:increment).
with('foo_real_time', a_kind_of(Numeric))
expect(transaction).to receive(:increment).
with('foo_cpu_time', a_kind_of(Numeric))
expect(transaction).to receive(:increment).
with('foo_call_count', 1)
described_class.measure(:foo) { 10 }
end
it 'returns the return value of the block' do
val = described_class.measure(:foo) { 10 }
expect(val).to eq(10)
end
end
end
describe '.tag_transaction' do
context 'without a transaction' do
it 'does nothing' do
expect_any_instance_of(Gitlab::Metrics::Transaction).
not_to receive(:add_tag)
described_class.tag_transaction(:foo, 'bar')
end
end
context 'with a transaction' do
let(:transaction) { Gitlab::Metrics::Transaction.new }
it 'adds the tag to the transaction' do
expect(described_class).to receive(:current_transaction).
and_return(transaction)
expect(transaction).to receive(:add_tag).
with(:foo, 'bar')
described_class.tag_transaction(:foo, 'bar')
end
end
end
describe '.action=' do
context 'without a transaction' do
it 'does nothing' do
expect_any_instance_of(Gitlab::Metrics::Transaction).
not_to receive(:action=)
described_class.action = 'foo'
end
end
context 'with a transaction' do
it 'sets the action of a transaction' do
trans = Gitlab::Metrics::Transaction.new
expect(described_class).to receive(:current_transaction).
and_return(trans)
expect(trans).to receive(:action=).with('foo')
described_class.action = 'foo'
end
end
end
describe '#series_prefix' do
it 'returns a String' do
expect(described_class.series_prefix).to be_an_instance_of(String)
end
end
describe '.add_event' do
context 'without a transaction' do
it 'does nothing' do
expect_any_instance_of(Gitlab::Metrics::Transaction).
not_to receive(:add_event)
described_class.add_event(:meow)
end
end
context 'with a transaction' do
it 'adds an event' do
transaction = Gitlab::Metrics::Transaction.new
expect(transaction).to receive(:add_event).with(:meow)
expect(described_class).to receive(:current_transaction).
and_return(transaction)
described_class.add_event(:meow)
end
end
end
end
|
