.wp-env.json

{
  "phpVersion": "8.0",
  "plugins": [
    ".",
    "../woocommerce"
  ],
  "config": {
    "WP_TESTS_DOMAIN": "localhost:8080",
    "WP_TESTS_EMAIL": "test@test.org",
    "WP_TESTS_TITLE": "M3 Customers",
    "WP_PHP_BINARY": "php"
  }
}

README.md

Testing

npm -g i @wordpress/env
wp-env start
wp-env run phpunit 'phpunit -c /var/www/html/wp-content/plugins/<plugin>/phpunit.xml'

bootstrap.php

<?php
// actually in tests/bootstrap.php
/**
 * PHPUnit bootstrap file
 */

// Composer autoloader must be loaded before WP_PHPUNIT__DIR will be available
require_once dirname(__DIR__) . '/vendor/autoload.php';

// Give access to tests_add_filter() function.
require_once getenv('WP_PHPUNIT__DIR') . '/includes/functions.php';

tests_add_filter('muplugins_loaded', function() {
    require dirname(__DIR__, 2) . '/woocommerce/woocommerce.php';
    require dirname(__DIR__) . '/plugin.php';
} );

// Start up the WP testing environment.
require getenv('WP_PHPUNIT__DIR') . '/includes/bootstrap.php';

composer.json

{
  "name": "...",
  "type": "wordpress-plugin",
  "authors": [],
  "keywords": [
    "wordpress"
  ],
  "require": {},
  "require-dev": {
    "squizlabs/php_codesniffer": "^2.5.1",
    "phpunit/phpunit": "^9.5",
    "wp-phpunit/wp-phpunit": "^5.9",
    "yoast/phpunit-polyfills": "^1.0"
  },
  "autoload": {
    "psr-4": {
      "M3\\Customers\\": "src/"
    }
  },
  "scripts": {
    "test": [
      "phpunit"
    ]
  },
  "archive" : {
    "exclude": [
      ".gitignore"
    ]
  }
}

phpunit.xml

<?xml version="1.0"?>
<phpunit
  bootstrap="tests/bootstrap.php"
  backupGlobals="false"
  colors="true"
  convertErrorsToExceptions="true"
  convertNoticesToExceptions="true"
  convertWarningsToExceptions="true"
  >
  <testsuites>
    <testsuite name="unit">
      <directory prefix="test-" suffix=".php">./tests/</directory>
    </testsuite>
  </testsuites>

  <php>
    <env name="WP_PHPUNIT__TESTS_CONFIG" value="tests/wp-config.php" />
  </php>
</phpunit>

test-rest.php

<?php
// actually in tests/test-rest.php

use M3\Customers\Models\Customer;

class SampleTest extends WP_UnitTestCase
{
    protected function doFixtureRequest(): WP_REST_Response
    {
        $fixture = file_get_contents(__DIR__ . '/fixtures/create.json');
        $request = new WP_REST_Request('POST', '/m3/v1/customers');
        $request->set_body($fixture);
        $request->set_header('Content-Type', 'application/json');
        return rest_do_request($request);
    }

	/**
	 * A single example test.
	 */
	function test_sample(): void
    {
        wp_get_current_user()->add_role('administrator');

        $response = $this->doFixtureRequest();
        $this->assertEquals($response->get_status(), 200);
        $this->assertEquals($response->get_data(), (object) [
            'updated' => 0,
            'created' => 1,
            'trashed' => 0,
        ]);

        $response = $this->doFixtureRequest();
        $this->assertEquals($response->get_data(), (object) [
            'updated' => 1,
            'created' => 0,
            'trashed' => 0,
        ]);

        $user = get_user_by('email', 'email@email.com');
        $this->assertNotFalse($user);
        $this->assertEquals($user->first_name, 'billing.Firstname');
        $this->assertEquals(get_user_meta($user->ID, Customer::CUSTOMER_ID, true), 1234567);

        $customer = new WC_Customer($user->ID);
        $this->assertEquals($customer->get_shipping_address(), 'shipping.Address');
	}
}