Re-enable purchase unit tests and falling back to simply not display any prices when data is not available

[chihsuan]

Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

Closes #37081.

• Re-enable unit tests that were marked as skipped in Mark purchase tests skipped temporarily #36741
• Falling back to simply not display any prices rather than empty prices when price data is not available

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

1. CI should pass
2. Run wp option set --format=json _transient_wc_onboarding_product_data '{\"en_US\":{\"body\":\"\"}}'
3. Go to Onboarding wizard > Product Types tab (/wp-admin/admin.php?page=wc-admin&path=%2Fsetup-wizard&step=product-types)
4. Observe that it only shows the product type names, not containing price symbols.

Before:

After:

[github-actions]

Hi @ilyasfoo, @rjchow, @woocommerce/ghidorah

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions

[github-actions]

Test Results Summary

Commit SHA: de58bb2

Test 🧪	Passed ✅	Failed 🚨	Broken 🚧	Skipped ⏭️	Unknown ❔	Total 📊	Duration ⏱️
API Tests	267	0	0	2	0	269	0m 53s
E2E Tests	187	0	0	10	0	197	13m 27s

---

To view the full API test report, click here.
To view the full E2E test report, click here.
To view all test reports, visit the WooCommerce Test Reports Dashboard.

[codecov]

Codecov Report

Merging #38163 (de58bb2) into trunk (5b3666b) will increase coverage by 0.0%.
The diff coverage is 25.0%.

Additional details and impacted files

@@           Coverage Diff            @@
##             trunk   #38163   +/-   ##
========================================
  Coverage     51.2%    51.2%           
  Complexity   17417    17417           
========================================
  Files          440      440           
  Lines        80639    80635    -4     
========================================
- Hits         41312    41310    -2     
+ Misses       39327    39325    -2     

Impacted Files	Coverage Δ
...ocommerce/includes/abstracts/abstract-wc-order.php	76.4% <ø> (ø)
...ommerce/includes/abstracts/abstract-wc-product.php	88.3% <ø> (ø)
...ocommerce/includes/admin/class-wc-admin-addons.php	0.0% <ø> (ø)
...ocommerce/includes/admin/class-wc-admin-status.php	14.5% <ø> (ø)
.../includes/admin/helper/class-wc-helper-updater.php	28.9% <ø> (ø)
...erce/includes/admin/importers/mappings/default.php	4.5% <0.0%> (ø)
...udes/admin/settings/class-wc-settings-products.php	98.6% <ø> (ø)
...lugins/woocommerce/includes/class-wc-countries.php	95.4% <ø> (ø)
plugins/woocommerce/includes/class-wc-coupon.php	73.9% <ø> (ø)
...woocommerce/includes/class-wc-frontend-scripts.php	0.0% <ø> (ø)
... and 12 more

... and 1 file with indirect coverage changes

[rjchow]

Thanks for getting around to this!

[ilyasfoo]

Tested well, LGTM! 🚢