Tonya Mork 81ade4da65 Build/Test Tools: Fix null handling and string type casting in WP_UnitTestCase_Base::assertSameIgnoreEOL().
Basically, the whole `assertSameIgnoreEOL()` assertion was fundamentally flawed. The assertion contends that it checks that the expected and actual values are of the same type and value, but the reality was very different.

* The function uses `map_deep()` to potentially handle all sorts of inputs.
* `map_deep()` handles arrays and objects with special casing, but will call the callback on everything else without further distinction.
* The callback used passes the expected/actual value on to the `str_replace()` function to remove potential new line differences.
* And the `str_replace()` function will - with a non-array input for the `$subject` - always return a string.
* The output of these calls to `map_deep()` will therefore have "normalized" _all properties_ in objects, _all values_ in arrays and _all non-object, non-array values_ to strings.
* And a call to `assertSame()` will therefore NEVER do a proper type check as the type of all input has already, unintentionally, been "normalized" to string.

Aside from this clear flaw in the design of the assertion, PHP 8.1 now exposes a further issue as a `null` value for an object property, an array value or a plain value, will now yield a ` str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated` notice.

To fix both these issues, the fix in this PR ensures that the call to `str_replace()` will now only be made if the input is a text string.
All other values passed to the callback are left in their original type.

This ensures that a proper value AND type comparison can be done as well as prevents the PHP 8.1 deprecation notices.

Ref:
* https://developer.wordpress.org/reference/functions/map_deep/
* https://www.php.net/manual/en/function.str-replace.php

This commit:
- Fixes type-casting of non-string values to `string` (the flawed part of this assertion) by invoking `str_replace()` when the value is of string type.
- Fixes the PHP 8.1 `str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated` deprecation notice.
- Micro-optimization: skips `map_deep()` when actual and/or expected are `null` (no need to process).
- Adjusts the method documentation for both this method and the `assertEqualsIgnoreEOL()` alias method to document that the `$expected` and `$actual` parameters can be of any type.

Follow-up to [48937], [51135], [51478].

Props jrf, hellofromTonya.
See #53363, #53635.

git-svn-id: https://develop.svn.wordpress.org/trunk@51831 602fd350-edb4-49c9-b593-d223f7449a82
2021-09-20 19:58:09 +00:00

WordPress

Welcome to the WordPress development repository! Please check out the contributor handbook for information about how to open bug reports, contribute patches, test changes, write documentation, or get involved in any way you can.

Getting Started

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You will need a basic understanding of how to use the command line on your computer. This will allow you to set up the local development environment, to start it and stop it when necessary, and to run the tests.

You will need Node and npm installed on your computer. Node is a JavaScript runtime used for developer tooling, and npm is the package manager included with Node. If you have a package manager installed for your operating system, setup can be as straightforward as:

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Development Environment Commands

Ensure Docker is running before using these commands.

To start the development environment for the first time

Clone the current repository using git clone https://github.com/WordPress/wordpress-develop.git. Then in your terminal move to the repository folder cd wordpress-develop and run the following commands:

npm install
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npm run env:start
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Your WordPress site will accessible at http://localhost:8889. You can see or change configurations in the .env file located at the root of the project directory.

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npm run env:cli <command>

WP-CLI has a lot of useful commands you can use to work on your WordPress site. Where the documentation mentions running wp, run npm run env:cli instead. For example:

npm run env:cli help

To run the tests

These commands run the PHP and end-to-end test suites, respectively:

npm run test:php
npm run test:e2e

To restart the development environment

You may want to restart the environment if you've made changes to the configuration in the docker-compose.yml or .env files. Restart the environment with:

npm run env:restart

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npm run env:stop

To start the development environment again

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npm run env:start

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