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I18N: Refactor determine_locale() for performance and readability.

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Refactors the function to avoid unnecessary `get_locale()` calls and slightly improve performance, while keeping it readable.

Adds tests.

Props Cybr, spacedmonkey, swissspidy.
Fixes #58317.

git-svn-id: https://develop.svn.wordpress.org/trunk@55862 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Pascal Birchler
2023-05-26 17:55:40 +00:00
parent 404fd63386
commit 66d85f381e
2 changed files with 276 additions and 20 deletions
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tests/phpunit/tests/l10n/determineLocale.php
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<?php
/**
* @group l10n
* @group i18n
*
* @covers ::determine_locale
*/
class Tests_L10n_DetermineLocale extends WP_UnitTestCase {
protected $locale;
protected static $user_id;
public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
self::$user_id = $factory->user->create(
array(
'role' => 'administrator',
'locale' => 'userLocale',
)
);
}
public function tear_down() {
unset( $_SERVER['CONTENT_TYPE'], $_GET['_locale'], $_COOKIE['wp_lang'], $GLOBALS['pagenow'] );
parent::tear_down();
}
public function test_short_circuit_empty() {
add_filter( 'pre_determine_locale', '__return_false' );
$this->assertNotFalse( determine_locale() );
}
public function test_short_circuit_no_string() {
add_filter(
'pre_determine_locale',
static function() {
return 1234;
}
);
$this->assertNotFalse( determine_locale() );
}
public function test_short_circuit_string() {
add_filter(
'pre_determine_locale',
static function() {
return 'myNewLocale';
}
);
$this->assertSame( 'myNewLocale', determine_locale() );
}
public function test_defaults_to_site_locale() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
$this->assertSame( get_locale(), determine_locale() );
}
public function test_is_admin_no_user() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
set_current_screen( 'dashboard' );
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_is_admin_user_locale() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
set_current_screen( 'dashboard' );
wp_set_current_user( self::$user_id );
$this->assertSame( 'userLocale', determine_locale() );
}
public function test_json_request_user_locale() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$_SERVER['CONTENT_TYPE'] = 'application/json';
$_GET['_locale'] = 'user';
$this->assertSame( 'userLocale', determine_locale() );
}
public function test_json_request_user_locale_no_user() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
$_SERVER['CONTENT_TYPE'] = 'application/json';
$_GET['_locale'] = 'user';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_json_request_missing_get_param() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$_SERVER['CONTENT_TYPE'] = 'application/json';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_json_request_incorrect_get_param() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$_SERVER['CONTENT_TYPE'] = 'application/json';
$_GET['_locale'] = 'foo';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_get_param_but_no_json_request() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$_GET['_locale'] = 'user';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_wp_login_get_param_not_on_login_page() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$_GET['wp_lang'] = 'de_DE';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_wp_login_get_param_on_login_page() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$GLOBALS['pagenow'] = 'wp-login.php';
$_GET['wp_lang'] = 'de_DE';
$this->assertSame( 'de_DE', determine_locale() );
}
public function test_wp_login_get_param_on_login_page_empty_string() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$GLOBALS['pagenow'] = 'wp-login.php';
$_GET['wp_lang'] = '';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_wp_login_cookie_not_on_login_page() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$_COOKIE['wp_lang'] = 'de_DE';
$this->assertSame( 'siteLocale', determine_locale() );
}
public function test_wp_login_cookie_on_login_page() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$GLOBALS['pagenow'] = 'wp-login.php';
$_COOKIE['wp_lang'] = 'de_DE';
$this->assertSame( 'de_DE', determine_locale() );
}
public function test_wp_login_cookie_on_login_page_empty_string() {
add_filter(
'locale',
static function() {
return 'siteLocale';
}
);
wp_set_current_user( self::$user_id );
$GLOBALS['pagenow'] = 'wp-login.php';
$_COOKIE['wp_lang'] = '';
$this->assertSame( 'siteLocale', determine_locale() );
}
}