---
id: TST-COM-ORD-049
title: ChosenInstallmentPlanOf
kind: unit
product_area: commerce
module: orders
revision: 1
status: draft
source_sha:
  services-commerce: c8b66a98e2490617aec38ba5c8165dd9bd0a8f9b
repository: services-commerce
files:
  - modules/checkout/tests/unit/checkout/checkout-installments.spec.js
implements: []
environment: mock
implementation_state: implemented
latest_result: not-run
latest_run_at: null
latest_run_ref: null
conformance: not-verified
estimated_minutes: 1
isolation: 'The suite owns its in-memory inputs, scripted responses and rendered component state.'
evidence:
  - provenance: test
    source: 'services-commerce:modules/checkout/tests/unit/checkout/checkout-installments.spec.js'
    test_cases:
      - 'reads the plan on the checkout’s tender selection, and none without one or with a blank'
      - >-
        sends the items, then the shipping and tax charges on their products only when there is a charge and a
        product
      - 'answers nothing when no plan is chosen, asking nothing'
      - 'refuses by the admission before any call: a pay-now profile, a plan the profile does not list'
      - answers unavailable without a call when no transport reaches Accounting
      - >-
        sends the contract’s preview body over the lines (the start date today in the tenant’s zone) and
        answers the quoted summary
      - 'carries Accounting’s refusal with its code, and no answer as unavailable'
scenario_coverage: []
dependency_evidence:
  provenance: test
  source: 'services-commerce:modules/checkout/tests/unit/checkout/checkout-installments.spec.js'
  declared_by_test: >-
    the step and the rules. Doubled: the installments port (a scripted double recording what it was asked),
    the clock.
---

# ChosenInstallmentPlanOf

## Verification Boundary

The unit suite checks the named contract or helper with controlled inputs.

## What This Suite Proves

The registered cases check chosenInstallmentPlanOf with their fixture records and assertions. Scenario bindings name only the examples those cases exercise.

## What It Does Not Prove

A registered file supplies no run result or verified conformance by itself. Local fixtures do not establish deployed cross-service behavior or complete browser journeys.

## Real Dependencies and Test Doubles

Inputs and external responses are controlled in process; this suite establishes no deployed service behavior.

## Must Not Be Doubled

The named contract validation or component behavior under assertion must use its actual implementation.