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# frozen_string_literal: true
require 'spec_helper'
describe Gitlab::Sherlock::Query do
let(:started_at) { Time.utc(2015, 1, 1) }
let(:finished_at) { started_at + 5 }
let(:query) do
described_class.new('SELECT COUNT(*) FROM users', started_at, finished_at)
end
describe 'new_with_bindings' do
it 'returns a Query' do
sql = 'SELECT COUNT(*) FROM users WHERE id = $1'
bindings = [[double(:column), 10]]
query = described_class
.new_with_bindings(sql, bindings, started_at, finished_at)
expect(query.query).to eq('SELECT COUNT(*) FROM users WHERE id = 10;')
end
end
describe '#id' do
it 'returns a String' do
expect(query.id).to be_an_instance_of(String)
end
end
describe '#query' do
it 'returns the query with a trailing semi-colon' do
expect(query.query).to eq('SELECT COUNT(*) FROM users;')
end
end
describe '#started_at' do
it 'returns the start time' do
expect(query.started_at).to eq(started_at)
end
end
describe '#finished_at' do
it 'returns the completion time' do
expect(query.finished_at).to eq(finished_at)
end
end
describe '#backtrace' do
it 'returns the backtrace' do
expect(query.backtrace).to be_an_instance_of(Array)
end
end
describe '#duration' do
it 'returns the duration in milliseconds' do
expect(query.duration).to be_within(0.1).of(5000.0)
end
end
describe '#to_param' do
it 'returns the query ID' do
expect(query.to_param).to eq(query.id)
end
end
describe '#formatted_query' do
it 'returns a formatted version of the query' do
expect(query.formatted_query).to eq(<<-EOF.strip)
SELECT COUNT(*)
FROM users;
EOF
end
end
describe '#last_application_frame' do
it 'returns the last application frame' do
frame = query.last_application_frame
expect(frame).to be_an_instance_of(Gitlab::Sherlock::Location)
expect(frame.path).to eq(__FILE__)
end
end
describe '#application_backtrace' do
it 'returns an Array of application frames' do
frames = query.application_backtrace
expect(frames).to be_an_instance_of(Array)
expect(frames).not_to be_empty
frames.each do |frame|
expect(frame.path).to start_with(Rails.root.to_s)
end
end
end
describe '#explain' do
it 'returns the query plan as a String' do
lines = [
['Aggregate (cost=123 rows=1)'],
[' -> Index Only Scan using index_cats_are_amazing']
]
result = double(:result, values: lines)
allow(query).to receive(:raw_explain).and_return(result)
expect(query.explain).to eq(<<-EOF.strip)
Aggregate (cost=123 rows=1)
-> Index Only Scan using index_cats_are_amazing
EOF
end
end
end
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