fix: issues that cause tests to fail

[sjinks]

This pull request introduces several improvements to the codebase, with a primary focus on enhancing test code quality and consistency. Key changes include replacing require and include with their _once variants for improved safety, updating test functions to use public visibility for adherence to PHPUnit conventions, and refining test assertions for greater accuracy.

Test Code Improvements:

• Updated all test functions to use public visibility in compliance with PHPUnit's requirements. This change affects multiple test files, such as test-cli-orchestrate-sites.php, test-event.php, test-events-store.php, test-events.php, and test-internal-events.php. [1] [2] [3] [4] [5]

• Improved assertions for test accuracy, such as replacing assertEquals with assertEqualsWithDelta in time-sensitive tests to account for minor timing differences.

Dependency Loading Enhancements:

• Replaced require and include with require_once and include_once in __tests__/bootstrap.php to prevent potential issues with multiple inclusions of the same files. [1] [2]

Minor Refactoring:

• Removed unused variable assignments in test files to streamline the code, such as in test-events-store.php. [1] [2]

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Fixes: #399

[Copilot]

Pull Request Overview

This PR addresses multiple test failures by fixing type-related issues, updating dependencies, and improving code consistency. The changes focus on resolving PHP type compatibility issues and modernizing the test suite.

• Updates function parameter types and return type hints for better PHP compatibility
• Modernizes test method visibility and fixes logical operators
• Updates Composer dependencies to use more flexible version constraints

Reviewed Changes

Copilot reviewed 12 out of 14 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
includes/wp-cli/class-orchestrate-sites.php	Fixes integer division and logical operator issues
includes/class-singleton.php	Updates return type annotation from self to static
includes/class-events-store.php	Adds nullable type hints for optional string parameters
composer.json	Updates dependency versions to use flexible constraints and reorganizes configuration
tests/unit-tests/*.php	Makes test methods public and improves code consistency
tests/bootstrap.php	Changes include statements to include_once for better reliability

Comments suppressed due to low confidence (1)

tests/unit-tests/test-event.php:73

• Using assertEqualsWithDelta instead of assertEquals for timestamp comparison is a good improvement as it accounts for minor timing variations during test execution.

		$this->assertEqualsWithDelta( time() + HOUR_IN_SECONDS, $event->get_timestamp(), 1 );