Dynamic Built-in Generators

Testing entity creation endpoints (POST /users, POST /orders) repeatedly causes 409 Conflict: User already exists when fields require unique values.

RouteCase provides built-in dynamic generators prefixed with $ that evaluate dynamically on every test run.

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Generator Reference

Generator Tag	Description	Example Output	Best Used For
{{$uuid}}	Standard UUID v4 string	f47ac10b-58cc-4372-a567-0e02b2c3d479	Primary keys, idempotency keys, transaction IDs
{{$timestamp}}	Current epoch timestamp in milliseconds	1729781963847	Cache busting, sequential sorting, unique suffixes
{{$isoDate}}	Current ISO-8601 UTC timestamp	2026-10-24T16:00:00.000Z	createdAt, updatedAt, audit log timestamps
{{$randomEmail}}	Unique email with current epoch timestamp	user_1729781963@routecase.test	User registration without email collision
{{$randomName}}	Realistic random full name	Alice Johnson, David Chen	Contact details, display names
{{$randomInt}}	Random integer between 1000 and 9999	4821	Random port numbers, SKUs, quantity values

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Practical Example: User Registration

{
  "name": "Register New Customer",
  "method": "POST",
  "path": "/api/v1/customers",
  "headers": {
    "Content-Type": "application/json"
  },
  "success": [
    {
      "name": "Create unique customer record",
      "body": {
        "id": "{{$uuid}}",
        "name": "{{$randomName}}",
        "email": "{{$randomEmail}}",
        "skuCode": "SKU-{{$randomInt}}",
        "registeredAt": "{{$isoDate}}",
        "epoch": "{{$timestamp}}"
      },
      "expect": {
        "status": 201,
        "bodyContains": "@routecase.test"
      }
    }
  ]
}

Every time you click ▶ Run Case, a completely fresh set of values is generated, allowing you to run continuous regression tests without manual database cleanup.