Testing Overview

amounts supports both ordinary equality assertions and opt-in RSpec matchers.

Minitest

You can already write:

assert_equal Amount.usdc("1.50"), holding.amount

RSpec

Opt in explicitly:

require "amount/rspec"
require "amount/active_record/rspec"

Then write:

expect(holding.amount).to eq_amount("USDC|1.50")
expect(holding).to have_amount_column(:amount, "USDC|1.50")

Exact vs approximate

Use exact assertions for:

• equality
• persistence
• split and allocation
• registry configuration

Use approximate assertions for:

• conversion tests where small rounding windows are intentional