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b5ad7aa47aMutable objects can be challenging to work with in larger codebases because different parts of a system may modify the same instance, making it difficult to trace where and when changes occurred. This becomes especially problematic when debugging unexpected behaviour. By making `Validator` immutable, we ensure that adding rules via `with()` returns a new instance rather than mutating the original, and we use the `with()` method inside `__call()`, making every call to a rule into a clone of the current `Validator`. This provides several benefits: 1. Predictability: A `Validator` instance will always behave the same way throughout its lifetime, regardless of what other parts of the codebase do. 2. Safe dependency injection: Users can now confidently inject a base `Validator` from a DI container, knowing that any modifications made elsewhere will not affect their instance. 3. Easier debugging: Since validators cannot be mutated after creation, there's no need to track down where an unexpected rule was added. 4. Reusability: Users can create an initial `Validator` with some base rules and reuse it by just adding new rules to the chain without affecting the base `Validator`.
39 lines
1.6 KiB
PHP
39 lines
1.6 KiB
PHP
<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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test('Scenario #1', catchMessages(
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fn() => v::init()
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->key('mysql', v::init()
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->key('host', v::stringType())
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->key('user', v::stringType())->key('password', v::stringType())
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->key('schema', v::stringType()))
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->key('postgresql', v::init()
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->key('host', v::stringType())
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->key('user', v::stringType())
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->key('password', v::stringType())
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->key('schema', v::stringType()))
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->assert(['mysql' => ['host' => 42, 'schema' => 42], 'postgresql' => ['user' => 42, 'password' => 42]]),
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fn(array $messages) => expect($messages)->toBe([
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'__root__' => '`["mysql": ["host": 42, "schema": 42], "postgresql": ["user": 42, "password": 42]]` must pass all the rules',
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'mysql' => [
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'__root__' => '`.mysql` must pass all the rules',
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'host' => '`.mysql.host` must be a string',
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'user' => '`.mysql.user` must be present',
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'password' => '`.mysql.password` must be present',
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'schema' => '`.mysql.schema` must be a string',
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],
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'postgresql' => [
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'__root__' => '`.postgresql` must pass all the rules',
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'host' => '`.postgresql.host` must be present',
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'user' => '`.postgresql.user` must be a string',
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'password' => '`.postgresql.password` must be a string',
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'schema' => '`.postgresql.schema` must be present',
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],
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]),
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));
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