Make wp_array_get internal for now. Add tests to _wp_array_get;

[jorgefilipecosta]

According to feedback received at #51461. This ticket contains a patch to make wp_array_get internal.
After more core code uses it we can decide if the function is valuable and something we want to expose or not.
This Patch also adds test cases and does some enhancements to the function wp_array_get to make it more similar to lodash namely the default value and the way null is handled.

According to feedback received in ticket 51461. This PR contains makes wp_array_get internal.
After more core code uses it we can decide if the function is valuable and something we want to expose or not.

Trac ticket: core.trac.wordpress.org/ticket/51720

[johnbillion]

@jorgefilipecosta Can you point us to the upstream tests for this function please? It would be worth bringing them into core regardless of whether it's a private function or not.

[jorgefilipecosta]

Hi @johnbillion we did not have tests for this function. I added tests to this Patch/PR.

[hellofromTonya]

Tests were added yesterday.

[Hareesh Pillai]

Thanks for the test.

Minor change - I guess we'll have to update the function name in the docblock in the tests file.

 * Tests wp_array_slice_assoc function

[johnbillion]

Pushed some formatting updates to the PR. Looking good.

[johnbillion]

In 49580:

General: Convert wp_array_get() to a "private" function and add tests.

This function may be promoted in the future if it's deemed useful enough.

Props dd32, jorgefilipecosta, Hareesh Pillai

Fixes #51720

[jorgefilipecosta]

Thank you all for the help on this ticket!

[SergeyBiryukov]

In 50964:

Tests: Add missing tests for the _wp_array_get() function.

Follow-up to [49143], [49144], [49580].

Props jorgefilipecosta, johnbillion.
See #51461, #51720, #52625.

[SergeyBiryukov]

In 50970:

Tests: Remove trailing commas in function calls in _wp_array_get() tests.

This fixes parse errors on PHP 7.2 and lower versions.

Follow-up to [49143], [49144], [49580], [50964].

See #51461, #51720, #52625.