ExUnit-style assertions for Accrue.Mailer.Test intent captures (D6-05). Symmetric with Accrue.Test.PdfAssertions.

Usage

use Accrue.Test.MailerAssertions
# or
import Accrue.Test.MailerAssertions

Matching

• :type -> email intent type, also accepted as the first argument
• :to -> assigns[:to] || assigns["to"]
• :customer_id -> assigns[:customer_id] || assigns["customer_id"]
• :assigns -> subset match on the provided assign keys
• :matches -> 1-arity predicate escape hatch on %{type:, assigns:}

All helpers consume {:accrue_email_delivered, type, assigns} tuples sent by Accrue.Mailer.Test.deliver/2. Messages are process-local (no cross-test leakage), so async: true is safe. Cross-process owner or global capture modes are intentionally not the default; if a host test needs them, name that mode explicitly and treat it with the same caution as Mox or Swoosh global mode.