Update testing instructions for 5.9.0

Author: opr

docs/testing/releases/590.md

@@ -0,0 +1,34 @@
+## Testing notes and ZIP for release 5.9.0
+
+Zip file for testing: [woocommerce-gutenberg-products-block.zip](https://github.com/woocommerce/woocommerce-gutenberg-products-block/files/7154664/woocommerce-gutenberg-products-block.zip)
+
+## Feature plugin and package inclusion in WooCommerce
+
+### Twenty Twenty: Adjust font styles for filter and product grid blocks ([4545](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4545))
+
+1. Activate Twenty Twenty
+2. Create a new page
+3. Add the column block (1/3 + 2/3) to the created page
+4. Add the _Active Product Filters_, _Filter Products by Price_, _Filter Products by Attribute_ & _Filter Products by Stock_ blocks to the 1/3 column
+5. Add the _All Products_ & _Products by Category_ blocks to the 2/3 column
+6. Check the font sizes of the elements in the editor
+7. Check the font sizes of the elements in the frontend
+
+### Add extensibility point for extensions to filter payment methods ([4668](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4668))
+
+1. Make sure Check payments and Cash on delivery payment methods are activated and appear in the Checkout block
+2. Install this extension specifically made for testing: [woocommerce-payment-method-test.zip](https://github.com/woocommerce/woocommerce-gutenberg-products-block/files/7154980/woocommerce-payment-method-test.zip) - the code it includes is:
+```js
+import { registerPaymentMethodExtensionCallbacks} from '@woocommerce/blocks-registry';
+
+registerPaymentMethodExtensionCallbacks( 'woocommerce-marketplace-extension',
+	{
+		cod: ( arg ) => { return false; },
+                 // this zipcode works only for Germany
+		cheque: ( arg ) => { return arg.billingData.postcode === "12345";}
+	}
+);
+```
+3. Go to the Checkout block
+4. Notice that Cash on delivery is no longer available
+5. Notice that Check payments are available only when the Country is Germany and the Postcode for Billing data is 12345

docs/testing/releases/README.md

@@ -41,3 +41,4 @@ Every release includes specific testing instructions for new features and bug fi
 -   [5.7.0](./570.md)
     -   [5.7.1](./571.md)
 -   [5.8.0](./580.md)
+-   [5.9.0](./590.md)