feat(rollup): add models and write path [1/3] (#13796)

## PR#1: Reporting events rollup — model and write path

Reporting queries currently hit the `reporting_events` table directly.
This works, but the table grows linearly with event volume, and
aggregation queries (counts, averages over date ranges) get
progressively slower as accounts age.

This PR introduces a pre-aggregated `reporting_events_rollups` table
that stores daily per-metric, per-dimension (account/agent/inbox)
totals. The write path is intentionally decoupled from the read path —
rollup rows are written inline from the event listener via upsert, and a
backfill service exists to rebuild historical data from raw events.
Nothing reads from this table yet.

The write path activates when an account has a `reporting_timezone` set
(new account setting). The `reporting_events_rollup` feature flag
controls only the future read path, not writes — so rollup data
accumulates silently once timezone is configured. A `MetricRegistry`
maps raw event names to rollup column semantics in one place, keeping
the write and (future) read paths aligned.

### What changed

- Migration for `reporting_events_rollups` with a unique composite index
for upsert
- `ReportingEventsRollup` model
- `reporting_timezone` account setting with IANA timezone validation
- `MetricRegistry` — single source of truth for event-to-metric mappings
- `RollupService` — real-time upsert from event listener
- `BackfillService` — rebuilds rollups for a given account + date from
raw events
- Rake tasks for interactive backfill and timezone setup
- `reporting_events_rollup` feature flag (disabled by default)

### How to test

1. Set a `reporting_timezone` on an account
(`Account.first.update!(reporting_timezone: 'Asia/Kolkata')`)
2. Resolve a conversation or trigger a first response
3. Check `ReportingEventsRollup.where(account_id: ...)` — rows should
appear
4. Run backfill: `bundle exec rake reporting_events_rollup:backfill` and
verify historical data populates

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
This commit is contained in:
Shivam Mishra
2026-03-19 13:12:36 +05:30
committed by GitHub
parent 654fcd43f2
commit 9967101b48
20 changed files with 2013 additions and 1 deletions

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require 'rails_helper'
describe ReportingEvents::BackfillService do
describe '.backfill_date' do
let(:account) { create(:account, reporting_timezone: 'America/New_York') }
let(:date) { Date.new(2026, 2, 11) }
let(:user) { create(:user, account: account) }
let(:inbox) { create(:inbox, account: account) }
let(:conversation) { create(:conversation, account: account, inbox: inbox, assignee: user) }
it 'treats nil metric values as zero during backfill' do
reporting_event = create_backfill_event(
name: 'first_response', value: 100, value_in_business_hours: 50,
user: user, inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 11, 15)
)
# Simulate a legacy row that already exists in the database with nil metrics.
# rubocop:disable Rails/SkipsModelValidations
reporting_event.update_columns(value: nil, value_in_business_hours: nil)
# rubocop:enable Rails/SkipsModelValidations
expect { described_class.backfill_date(account, date) }.not_to raise_error
rollup = find_rollup('account', account.id, 'first_response')
expect(rollup.count).to eq(1)
expect(rollup.sum_value).to eq(0)
expect(rollup.sum_value_business_hours).to eq(0)
end
context 'when replacing rows fails atomically' do
before do
create(
:reporting_events_rollup,
account: account, date: date, dimension_type: 'account', dimension_id: account.id,
metric: 'first_response', count: 7, sum_value: 700, sum_value_business_hours: 350
)
end
it 'preserves existing rollups when building replacement rows fails' do
service = described_class.new(account, date)
allow(service).to receive(:build_rollup_rows).and_raise(StandardError, 'boom')
expect { service.perform }.to raise_error(StandardError, 'boom')
rollup = find_rollup('account', account.id, 'first_response')
expect(rollup.count).to eq(7)
expect(rollup.sum_value).to eq(700)
expect(rollup.sum_value_business_hours).to eq(350)
end
it 'preserves existing rollups when bulk insert fails' do
create_backfill_event(
name: 'first_response', value: 100, value_in_business_hours: 50,
user: user, inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 11, 15)
)
service = described_class.new(account, date)
allow(service).to receive(:bulk_insert_rollups).and_raise(StandardError, 'boom')
expect { service.perform }.to raise_error(StandardError, 'boom')
rollup = find_rollup('account', account.id, 'first_response')
expect(rollup.count).to eq(7)
expect(rollup.sum_value).to eq(700)
expect(rollup.sum_value_business_hours).to eq(350)
end
end
context 'when aggregating grouped rows' do
let(:second_user) { create(:user, account: account) }
let(:second_inbox) { create(:inbox, account: account) }
let(:second_conversation) { create(:conversation, account: account, inbox: second_inbox, assignee: second_user) }
before do
create_backfill_event(name: 'first_response', value: 100, value_in_business_hours: 60, user: user,
inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 11, 14))
create_backfill_event(name: 'first_response', value: 40, value_in_business_hours: 20, user: user,
inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 11, 15))
create_backfill_event(name: 'conversation_resolved', value: 200, value_in_business_hours: 80, user: second_user,
inbox: second_inbox, conversation: second_conversation, created_at: Time.utc(2026, 2, 11, 16))
create_backfill_event(name: 'reply_time', value: 500, value_in_business_hours: 300, user: user,
inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 12, 5))
described_class.backfill_date(account, date)
end
it 'does not instantiate reporting events' do
reporting_event_instantiations = count_reporting_event_instantiations do
described_class.backfill_date(account, date)
end
expect(reporting_event_instantiations).to eq(0)
end
it 'creates the expected number of rollup rows' do
rollups = ReportingEventsRollup.where(account_id: account.id, date: date)
# 3 dimensions × first_response + 3 dimensions × resolutions_count + 3 dimensions × resolution_time
expect(rollups.count).to eq(9)
end
it 'aggregates first_response at the account dimension' do
account_first_response = find_rollup('account', account.id, 'first_response')
expect(account_first_response.count).to eq(2)
expect(account_first_response.sum_value).to eq(140)
expect(account_first_response.sum_value_business_hours).to eq(80)
end
it 'aggregates first_response at the agent dimension' do
agent_first_response = find_rollup('agent', user.id, 'first_response')
expect(agent_first_response.count).to eq(2)
expect(agent_first_response.sum_value).to eq(140)
expect(agent_first_response.sum_value_business_hours).to eq(80)
end
it 'aggregates resolution_time at the agent dimension' do
agent_resolution_time = find_rollup('agent', second_user.id, 'resolution_time')
expect(agent_resolution_time.count).to eq(1)
expect(agent_resolution_time.sum_value).to eq(200)
expect(agent_resolution_time.sum_value_business_hours).to eq(80)
end
it 'aggregates first_response at the inbox dimension' do
inbox_first_response = find_rollup('inbox', inbox.id, 'first_response')
expect(inbox_first_response.count).to eq(2)
expect(inbox_first_response.sum_value).to eq(140)
expect(inbox_first_response.sum_value_business_hours).to eq(80)
end
it 'aggregates resolution_time at the inbox dimension' do
inbox_resolution_time = find_rollup('inbox', second_inbox.id, 'resolution_time')
expect(inbox_resolution_time.count).to eq(1)
expect(inbox_resolution_time.sum_value).to eq(200)
expect(inbox_resolution_time.sum_value_business_hours).to eq(80)
end
end
context 'when deduplicating distinct-count events' do
let(:second_user) { create(:user, account: account) }
let(:second_inbox) { create(:inbox, account: account) }
let(:conversation_b) { create(:conversation, account: account, inbox: inbox, assignee: user) }
let(:conversation_c) { create(:conversation, account: account, inbox: second_inbox, assignee: second_user) }
before do
# Two events for the same conversation — should count as 1
create_backfill_event(name: 'conversation_bot_handoff', value: 0, value_in_business_hours: 0, user: user,
inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 11, 14))
create_backfill_event(name: 'conversation_bot_handoff', value: 0, value_in_business_hours: 0, user: user,
inbox: inbox, conversation: conversation, created_at: Time.utc(2026, 2, 11, 15))
# Different conversation, same agent/inbox
create_backfill_event(name: 'conversation_bot_handoff', value: 0, value_in_business_hours: 0, user: user,
inbox: inbox, conversation: conversation_b, created_at: Time.utc(2026, 2, 11, 16))
# Different agent/inbox
create_backfill_event(name: 'conversation_bot_handoff', value: 0, value_in_business_hours: 0, user: second_user,
inbox: second_inbox, conversation: conversation_c, created_at: Time.utc(2026, 2, 11, 17))
described_class.backfill_date(account, date)
end
it 'creates the expected number of rollup rows' do
rollups = ReportingEventsRollup.where(account_id: account.id, date: date)
expect(rollups.count).to eq(5)
end
it 'counts 3 distinct conversations at the account dimension' do
expect(find_rollup('account', account.id, 'bot_handoffs_count').count).to eq(3)
end
it 'counts distinct conversations per agent' do
expect(find_rollup('agent', user.id, 'bot_handoffs_count').count).to eq(2)
expect(find_rollup('agent', second_user.id, 'bot_handoffs_count').count).to eq(1)
end
it 'counts distinct conversations per inbox' do
expect(find_rollup('inbox', inbox.id, 'bot_handoffs_count').count).to eq(2)
expect(find_rollup('inbox', second_inbox.id, 'bot_handoffs_count').count).to eq(1)
end
end
def create_backfill_event(**attributes)
create(
:reporting_event,
account: account,
**attributes
)
end
def find_rollup(dimension_type, dimension_id, metric)
ReportingEventsRollup.find_by!(
account_id: account.id,
date: date,
dimension_type: dimension_type,
dimension_id: dimension_id,
metric: metric
)
end
def count_reporting_event_instantiations(&)
instantiation_count = 0
subscriber = lambda do |_name, _start, _finish, _id, payload|
next unless payload[:class_name] == 'ReportingEvent'
instantiation_count += payload[:record_count]
end
ActiveSupport::Notifications.subscribed(subscriber, 'instantiation.active_record', &)
instantiation_count
end
end
end

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require 'rails_helper'
RSpec.describe ReportingEvents::EventMetricRegistry do
describe '.event_names' do
it 'returns the supported raw event names' do
expect(described_class.event_names).to eq(
%w[
conversation_resolved
first_response
reply_time
conversation_bot_resolved
conversation_bot_handoff
]
)
end
end
describe '.metrics_for' do
it 'returns the emitted rollup metrics for conversation_resolved' do
event = instance_double(ReportingEvent, name: 'conversation_resolved', value: 120, value_in_business_hours: 45)
expect(described_class.metrics_for(event)).to eq(
resolutions_count: {
count: 1,
sum_value: 0,
sum_value_business_hours: 0
},
resolution_time: {
count: 1,
sum_value: 120.0,
sum_value_business_hours: 45.0
}
)
end
it 'returns the emitted rollup metrics for first_response' do
event = instance_double(ReportingEvent, name: 'first_response', value: 80, value_in_business_hours: 20)
expect(described_class.metrics_for(event)).to eq(
first_response: {
count: 1,
sum_value: 80.0,
sum_value_business_hours: 20.0
}
)
end
it 'returns the emitted rollup metrics for reply_time' do
event = instance_double(ReportingEvent, name: 'reply_time', value: 40, value_in_business_hours: 15)
expect(described_class.metrics_for(event)).to eq(
reply_time: {
count: 1,
sum_value: 40.0,
sum_value_business_hours: 15.0
}
)
end
it 'returns the emitted rollup metrics for conversation_bot_resolved' do
event = instance_double(ReportingEvent, name: 'conversation_bot_resolved')
expect(described_class.metrics_for(event)).to eq(
bot_resolutions_count: {
count: 1,
sum_value: 0,
sum_value_business_hours: 0
}
)
end
it 'returns the emitted rollup metrics for conversation_bot_handoff' do
event = instance_double(ReportingEvent, name: 'conversation_bot_handoff')
expect(described_class.metrics_for(event)).to eq(
bot_handoffs_count: {
count: 1,
sum_value: 0,
sum_value_business_hours: 0
}
)
end
it 'returns an empty hash for unsupported events' do
event = instance_double(ReportingEvent, name: 'conversation_created')
expect(described_class.metrics_for(event)).to eq({})
end
end
describe '.metrics_for_aggregate' do
it 'returns aggregated rollup metrics for conversation_resolved groups' do
expect(
described_class.metrics_for_aggregate(
'conversation_resolved',
count: 3,
sum_value: 420,
sum_value_business_hours: 210
)
).to eq(
resolutions_count: {
count: 3,
sum_value: 0,
sum_value_business_hours: 0
},
resolution_time: {
count: 3,
sum_value: 420.0,
sum_value_business_hours: 210.0
}
)
end
it 'returns an empty hash for unsupported grouped events' do
expect(
described_class.metrics_for_aggregate(
'conversation_created',
count: 2,
sum_value: 100,
sum_value_business_hours: 50
)
).to eq({})
end
end
end

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require 'rails_helper'
describe ReportingEvents::RollupService do
describe '.perform' do
let(:account) { create(:account, reporting_timezone: 'America/New_York') }
let(:user) { create(:user, account: account) }
let(:inbox) { create(:inbox, account: account) }
let(:conversation) { create(:conversation, account: account, inbox: inbox, assignee: user) }
context 'when reporting_timezone is not set' do
before { account.update!(reporting_timezone: nil) }
it 'skips rollup creation' do
reporting_event = create(:reporting_event,
account: account,
name: 'conversation_resolved',
conversation: conversation)
expect do
described_class.perform(reporting_event)
end.not_to change(ReportingEventsRollup, :count)
end
end
context 'when reporting_timezone is invalid' do
it 'skips rollup creation' do
reporting_event = create(:reporting_event,
account: account,
name: 'conversation_resolved',
conversation: conversation)
allow(account).to receive(:reporting_timezone).and_return('Invalid/Zone')
expect do
described_class.perform(reporting_event)
end.not_to change(ReportingEventsRollup, :count)
end
end
context 'when reporting_timezone is set' do
describe 'conversation_resolved event' do
let(:rollup_event_created_at) { Time.utc(2026, 2, 12, 4, 0, 0) }
let(:rollup_write_time) { Time.utc(2026, 2, 12, 10, 0, 0) }
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'conversation_resolved',
value: 1000,
value_in_business_hours: 500,
user: user,
inbox: inbox,
conversation: conversation)
end
let(:expected_upsert_options) do
{
unique_by: %i[account_id date dimension_type dimension_id metric],
on_duplicate: 'count = reporting_events_rollups.count + EXCLUDED.count, ' \
'sum_value = reporting_events_rollups.sum_value + EXCLUDED.sum_value, ' \
'sum_value_business_hours = reporting_events_rollups.sum_value_business_hours + EXCLUDED.sum_value_business_hours, ' \
'updated_at = EXCLUDED.updated_at'
}
end
it 'creates rollup rows for account, agent, and inbox' do
described_class.perform(reporting_event)
# Account dimension
account_row = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
dimension_id: account.id,
metric: 'resolutions_count'
)
expect(account_row).to be_present
# Agent dimension
agent_row = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'agent',
dimension_id: user.id,
metric: 'resolutions_count'
)
expect(agent_row).to be_present
# Inbox dimension
inbox_row = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'inbox',
dimension_id: inbox.id,
metric: 'resolutions_count'
)
expect(inbox_row).to be_present
end
it 'creates correct metrics for conversation_resolved' do
described_class.perform(reporting_event)
resolutions_count = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'resolutions_count'
)
expect(resolutions_count.count).to eq(1)
expect(resolutions_count.sum_value).to eq(0)
expect(resolutions_count.sum_value_business_hours).to eq(0)
resolution_time = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'resolution_time'
)
expect(resolution_time.count).to eq(1)
expect(resolution_time.sum_value).to eq(1000)
expect(resolution_time.sum_value_business_hours).to eq(500)
end
it 'batches all rollup rows in a single upsert_all call' do
reporting_event.update!(created_at: rollup_event_created_at)
travel_to(rollup_write_time) do
captured_upsert = capture_upsert_all_call
described_class.perform(reporting_event)
expect(ReportingEventsRollup).to have_received(:upsert_all).once
expect(captured_upsert[:options][:unique_by]).to eq(expected_upsert_options[:unique_by])
expect(captured_upsert[:options][:on_duplicate].to_s.squish).to eq(expected_upsert_options[:on_duplicate])
expect(captured_upsert[:rows]).to match_array(expected_rollup_rows)
end
end
it 'respects account timezone for date bucketing' do
# Event created at 2026-02-11 22:00 UTC
# In EST (UTC-5) that's 2026-02-11 17:00 (same day)
reporting_event.update!(created_at: '2026-02-11 22:00:00 UTC')
described_class.perform(reporting_event)
rollup = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account'
)
expect(rollup.date).to eq('2026-02-11'.to_date)
end
it 'handles timezone boundary crossing' do
# Event created at 2026-02-12 04:00 UTC
# In EST (UTC-5) that's 2026-02-11 23:00 (previous day)
reporting_event.update!(created_at: '2026-02-12 04:00:00 UTC')
described_class.perform(reporting_event)
rollup = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account'
)
expect(rollup.date).to eq('2026-02-11'.to_date)
end
def capture_upsert_all_call
{}.tap do |captured_upsert|
allow(ReportingEventsRollup).to receive(:upsert_all) do |rows, **options|
captured_upsert[:rows] = rows
captured_upsert[:options] = options
end
end
end
def expected_rollup_rows
{
account: account.id,
agent: user.id,
inbox: inbox.id
}.flat_map do |dimension_type, dimension_id|
[
rollup_row(dimension_type, dimension_id, :resolutions_count, 0.0, 0.0),
rollup_row(dimension_type, dimension_id, :resolution_time, 1000.0, 500.0)
]
end
end
def rollup_row(dimension_type, dimension_id, metric, sum_value, sum_value_business_hours)
{
account_id: account.id,
date: Date.new(2026, 2, 11),
dimension_type: dimension_type,
dimension_id: dimension_id,
metric: metric,
count: 1,
sum_value: sum_value,
sum_value_business_hours: sum_value_business_hours,
created_at: rollup_write_time,
updated_at: rollup_write_time
}
end
end
describe 'first_response event' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'first_response',
value: 500,
value_in_business_hours: 300,
user: user,
inbox: inbox,
conversation: conversation)
end
it 'creates first_response metric' do
described_class.perform(reporting_event)
first_response = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'first_response'
)
expect(first_response).to be_present
expect(first_response.count).to eq(1)
expect(first_response.sum_value).to eq(500)
expect(first_response.sum_value_business_hours).to eq(300)
end
end
describe 'reply_time event' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'reply_time',
value: 200,
value_in_business_hours: 100,
user: user,
inbox: inbox,
conversation: conversation)
end
it 'creates reply_time metric' do
described_class.perform(reporting_event)
reply_time = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'reply_time'
)
expect(reply_time).to be_present
expect(reply_time.count).to eq(1)
expect(reply_time.sum_value).to eq(200)
expect(reply_time.sum_value_business_hours).to eq(100)
end
end
describe 'when metric values are nil' do
[
%w[conversation_resolved resolution_time],
%w[first_response first_response],
%w[reply_time reply_time]
].each do |event_name, metric|
it "treats nil values as zero for #{event_name}" do
reporting_event = create(:reporting_event,
account: account,
name: event_name,
value: 100,
value_in_business_hours: 50,
user: user,
inbox: inbox,
conversation: conversation)
reporting_event.assign_attributes(value: nil, value_in_business_hours: nil)
expect do
described_class.perform(reporting_event)
end.not_to raise_error
rollup = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: metric
)
expect(rollup).to be_present
expect(rollup.count).to eq(1)
expect(rollup.sum_value).to eq(0)
expect(rollup.sum_value_business_hours).to eq(0)
end
end
end
describe 'conversation_bot_resolved event' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'conversation_bot_resolved',
user: user,
inbox: inbox,
conversation: conversation)
end
it 'creates bot_resolutions_count metric' do
described_class.perform(reporting_event)
bot_resolutions = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'bot_resolutions_count'
)
expect(bot_resolutions).to be_present
expect(bot_resolutions.count).to eq(1)
expect(bot_resolutions.sum_value).to eq(0)
end
end
describe 'conversation_bot_handoff event' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'conversation_bot_handoff',
user: user,
inbox: inbox,
conversation: conversation)
end
it 'creates bot_handoffs_count metric' do
described_class.perform(reporting_event)
bot_handoffs = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'bot_handoffs_count'
)
expect(bot_handoffs).to be_present
expect(bot_handoffs.count).to eq(1)
expect(bot_handoffs.sum_value).to eq(0)
end
end
describe 'dimension handling' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'conversation_resolved',
value: 1000,
value_in_business_hours: 500,
user: user,
inbox: inbox,
conversation: conversation)
end
it 'skips dimensions with nil IDs' do
# Create event without user (user_id will be nil)
reporting_event.update!(user_id: nil)
described_class.perform(reporting_event)
# Agent dimension should not be created
agent_rows = ReportingEventsRollup.where(
account_id: account.id,
dimension_type: 'agent'
)
expect(agent_rows).to be_empty
end
end
describe 'upsert behavior' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'conversation_resolved',
value: 1000,
value_in_business_hours: 500,
user: user,
inbox: inbox,
conversation: conversation)
end
it 'increments count and sums on duplicate entries' do
# First call
described_class.perform(reporting_event)
resolution_time = ReportingEventsRollup.find_by(
account_id: account.id,
dimension_type: 'account',
metric: 'resolution_time'
)
expect(resolution_time.count).to eq(1)
expect(resolution_time.sum_value).to eq(1000)
expect(resolution_time.sum_value_business_hours).to eq(500)
# Second call with same event
reporting_event2 = create(:reporting_event,
account: account,
name: 'conversation_resolved',
value: 500,
value_in_business_hours: 250,
user: user,
inbox: inbox,
conversation: conversation,
created_at: reporting_event.created_at)
described_class.perform(reporting_event2)
# Total should be incremented
resolution_time.reload
expect(resolution_time.count).to eq(2)
expect(resolution_time.sum_value).to eq(1500)
expect(resolution_time.sum_value_business_hours).to eq(750)
end
it 'does not create duplicate rollup rows' do
described_class.perform(reporting_event)
initial_count = ReportingEventsRollup.count
# Create another event with same date and dimensions
reporting_event2 = create(:reporting_event,
account: account,
name: 'conversation_resolved',
value: 500,
value_in_business_hours: 250,
user: user,
inbox: inbox,
conversation: conversation,
created_at: reporting_event.created_at)
described_class.perform(reporting_event2)
# Row count should remain the same
expect(ReportingEventsRollup.count).to eq(initial_count)
end
end
end
context 'when event name in unknown' do
let(:reporting_event) do
create(:reporting_event,
account: account,
name: 'unknown_event',
user: user,
inbox: inbox,
conversation: conversation)
end
it 'does not create any rollup rows' do
expect do
described_class.perform(reporting_event)
end.not_to change(ReportingEventsRollup, :count)
end
end
end
end