Fix: pass expected checkout validation WP_Error instance

[jeebay]

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What does this implement/fix? Explain your changes.

Passes an empty instance of WP_Error to the woocommerce_after_checkout_validation action hook. WooCommerce passes an error object as the second argument to the hook and several 3rd party plugins expect it to be provided. Dokan for example doesn't even check is_wp_error before calling $errors->add() resulting in runtime errors.

Normally I'd expect plugin developers to know better, do better but in this case, the wp-graphql-woocommerce breaks from Woocommerce in not passing the second argument. Supplying an empty

Does this close any currently open issues?

#448

Any relevant logs, error output, GraphiQL screenshots, etc?

Example error from my application

errors: [{,…}]
0: {,…}
debugMessage: "Too few arguments to function WeDevs\\DokanPro\\Modules\\Moip\\Module::check_vendor_configure_moip(), 1 passed in /var/www/html/web/wp/wp-includes/class-wp-hook.php on line 292 and exactly 2 expected"
extensions: {category: "internal"}
locations: [{line: 2, column: 3}]
message: "Internal server error"
path: ["checkout"]
trace: [{file: "/var/www/html/web/wp/wp-includes/class-wp-hook.php", line: 292,…},…]

Any other comments?

I attempted to add a unit test but I the tests for CheckoutMutationTest aren't passing locally on a fresh clone. Arguably no test is needed as it would just be testing WordPress internals.

Output from a fresh install

Wpunit (docker) Tests (6) ------------------------------------------------------------------------------------------------------------
✖ CheckoutMutationTest: Checkout mutation (15.33s)
✖ CheckoutMutationTest: Checkout mutation with new account (7.11s)
✖ CheckoutMutationTest: Checkout mutation with no account (6.10s)
✖ CheckoutMutationTest: Checkout mutation with prepaid order (4.53s)
S CheckoutMutationTest: Checkout mutation with stripe (2.45s)
✔ CheckoutMutationTest: Checkout mutation cart item validation (2.72s)
--------------------------------------------------------------------------------------------------------------------------------------

Time: 2.73 seconds, Memory: 103.00 MB

There were 4 failures:

---------
1) CheckoutMutationTest: Checkout mutation
 Test  tests/wpunit/CheckoutMutationTest.php:testCheckoutMutation
Failed asserting that two arrays are equal.
- Expected | + Actual
@@ @@
'metaData' => Array (
0 => Array (...)
1 => Array (...)
+                    2 => Array (...)
)
'couponLines' => Array (
'nodes' => Array (
0 => Array (
-                            'databaseId' => 131
-                            'orderId' => 20
+                            'databaseId' => null
+                            'orderId' => null
'code' => '62off'
'discount' => '398.5'
-                            'discountTax' => '79.7'
+                            'discountTax' => null

.......

It looks like a database issue with some rows not updating? I'm glad to attempt again with some guidance on how to resolve.

Where has this been tested?

N/A

• WooGraphQL Version: …
• WPGraphQL Version: …
• WordPress Version:
• WooCommerce Version:

[jeebay]

@kidunot89 does this look reasonable to you? I did this based on how woocommerce passes an error object as the second argument to this filter.

Thank you for everything you do!

[kidunot89]

@jeebay So sorry about the delay review on this. Can you rebase to the develop branch and confirm if your change is passing CI/CD.

[jeebay]

@kidunot89 I rebased, still failing a codeclimate check that wants the class Checkout_Mutation one of its methods to be camelcase... That feels a bit out of scope but happy to include it if you like.

[jeebay]

@kidunot89 do you mind taking another look? I'm unable to run tests in CI as I'm not a maintainer.

[kidunot89]

@jeebay Activated 👌. CI running now

[qlty-cloud-legacy]

Code Climate has analyzed commit 2027873 and detected 2 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Style	2

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 77.0% (0.0% change).

View more on Code Climate.

[jeebay]

@kidunot89 tests pass except for code climate but it looks like these two issues have been ignored previously. Do you want me to address in this PR? Also happy to do in a followup.

[kidunot89]

@jeebay Thanks for the work on this 👍🏿