Canva Bounded Capacity Test

Overview

Measure your application under a declared workload while honoring endpoint-specific Canva metadata and actual responses. Default to mocks; a live probe must be small, reversible, and isolated.

Prerequisites

• Approved workload model, test target, user count, and abort thresholds
• Mock contract plus current endpoint rate metadata
• Synthetic assets, dedicated users, cleanup plan, and provider-test authorization

Instructions

Step 1: Model operations

Define logical reads, writes, async submissions, polling, refresh, and webhook processing separately. Include bursts, retries, and job completion distribution.

Step 2: Exercise mocks first

Use Write or Edit to implement contract-faithful responses for success, throttling, auth failure, in-progress, terminal failure, and schema drift.

Step 3: Size application limits

Measure queue depth, worker utilization, latency, memory, refresh lock contention, and database pressure; set local admission and concurrency below measured safe points.

Step 4: Authorize a provider probe

Limit it to named endpoint/user, request count, duration, and synthetic data. Avoid mutating operations unless their cleanup and duplicate impact are approved.

Step 5: Abort aggressively

Stop on unexpected authorization, data, sustained throttling, provider error, cleanup failure, or impact outside the named test.

Step 6: Produce capacity evidence

Use Write or Edit to record workload, environment, contract version, aggregate results, observed provider responses, chosen headroom, and rollback.

Authentication

Canva Connect calls use Bearer access tokens obtained by a backend through OAuth 2.0 Authorization Code with SHA-256 PKCE. Request explicit least-privilege scopes, keep client secrets and tokens out of browser-visible state, and serialize refresh so the replacement single-use refresh token is stored atomically.

Tool Discipline

Use Read and Grep for discovery and evidence. Use Write or Edit only for the approved artifact, code, configuration, test, or receipt described by this workflow; do not make an unapproved Canva-side change.

Output

• Scoped decision or implementation artifact
• Redacted operation and validation receipt
• Failure, rollback, and follow-up ownership record

Examples

A mock workload proves the export ledger and polling workers at expected burst. A small authorized live read then validates only endpoint behavior; it does not attempt to discover Canva's limits by saturation.

Error Handling

Failure	Response
No provider-test authorization	Run mocks only
Throttle response appears	Stop the live probe and lower the scoped rate
Refresh lock contention grows	Serialize per user and resize from measured evidence
Cleanup cannot be verified	Do not run mutating load cases

Resources

• First-party source notes
• API request model
• Latest OpenAPI