Unit test for SKU failing

[mikkamp]

Describe the bug:

When running the unit tests with WooCommerce 9.2.1 the test for the SKU fails:

1) Automattic\WooCommerce\GoogleListingsAndAds\Tests\Unit\Product\AttributeMapping\AttributeMappingWCProductAdapterTest::test_maps_rules_product_fields_sku
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'DUMMY SKU'
+'DUMMY SKU56'

wp-content/plugins/google-listings-and-ads/tests/Unit/Product/AttributeMapping/AttributeMappingWCProductAdapterTest.php:115

FAILURES!
Tests: 1276, Assertions: 4031, Failures: 1.

Re-running the tests with 9.1.0 works again. I haven't checked what could be causing the error, but 9.2 introduced a global unique identifier field next to the SKU, so possibly there could be something conflicting there.

Steps to reproduce:

1. Install latest versions for unit testing bin/install-wp-tests.sh <db_name> <db_user> <db_pass>
2. Run unit tests `vendor/bin/phpunit
3. Confirm that the test test_maps_rules_product_fields_sku fails

Expected behavior:

All unit tests to pass on the latest version of WooCommerce

[mikkamp]

Seems this is directly related to the change here where each generated SKU is made unique.

We should either compare the SKU directly from the created helper product, or compare only the SKU prefix without the number as a suffix.