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Merged
BramKaashoek merged 1 commit into from
May 13, 2026
Merged

Release new version (beta) #389

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1 change: 1 addition & 0 deletions .changeset/pre.json
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"add-product-type-update-actions",
"add-sqlite-storage",
"async-storage-layer",
"external-tax-mode-support",
"fix-cart-discount-codes",
"fix-category-parent-by-key",
"fix-empty-json-body-on-delete",
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23 changes: 23 additions & 0 deletions CHANGELOG.md
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# CHANGELOG

## 3.0.0-beta.4

### Minor Changes

- [#388](https://github.com/labd/commercetools-node-mock/pull/388) [`f053fb9`](https://github.com/labd/commercetools-node-mock/commit/f053fb9106128719dc1088634bf1fc02ffe80296) Thanks [@BramKaashoek](https://github.com/BramKaashoek)! - Add support for `External` and `ExternalAmount` tax modes on carts.

### New behavior

- **`External` tax mode** — `LineItem`, `CustomLineItem`, and shipping methods can now carry an `externalTaxRate`:
- `createCart` honors `LineItemDraft.externalTaxRate`, `CustomLineItemDraft.externalTaxRate`, and `CartDraft.externalTaxRateForShippingMethod`.
- `addLineItem`, `addCustomLineItem`, and `setShippingMethod`/`setCustomShippingMethod` accept `externalTaxRate`.
- New update actions: `setLineItemTaxRate`, `setCustomLineItemTaxRate`, `setShippingMethodTaxRate`.
- **`ExternalAmount` tax mode** — explicit gross amounts can be supplied per item and at the cart level:
- New update actions: `setLineItemTaxAmount`, `setCustomLineItemTaxAmount`, `setShippingMethodTaxAmount`, `setCartTotalTax`.
- In this mode the cart's `taxedPrice` is whatever `setCartTotalTax` last set; it is no longer aggregated from line items. `taxedShippingPrice` continues to mirror `shippingInfo.taxedPrice`.
- All tax calculations now respect `cart.taxRoundingMode` (`HalfEven` / `HalfUp` / `HalfDown`) instead of always using `Math.round`.

### Cart total recomputation after update actions

`CartUpdateHandler.apply` now recomputes `cart.taxedPrice` and `cart.taxedShippingPrice` after every update batch (except in `ExternalAmount` mode, where the cart total is authoritative via `setCartTotalTax`).

This fixes a pre-existing latent bug: previously these fields were only computed once during `create()` and were never refreshed after update actions, so e.g. running `setShippingMethod` after cart creation would leave the cart-level aggregate stale. It didn't show up before because `LineItem.taxedPrice` was never populated in any mode, so the aggregate had no contributors that could drift. With the new tax-mode work, line items and custom line items now actually carry `taxedPrice`, which made the gap observable and required fixing.

## 3.0.0-beta.3

### Patch Changes
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2 changes: 1 addition & 1 deletion package.json
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{
"name": "@labdigital/commercetools-mock",
"version": "3.0.0-beta.3",
"version": "3.0.0-beta.4",
"license": "MIT",
"author": "Michael van Tellingen",
"type": "module",
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