Comparable enum (#20)

* feat: comparable enum

* test: comparable enum

* ci: php-cs-fixer in repository scope

* chore: add `Comparable` usage in README

* ci: globally use `php-cs-fixer`

* improve Comparable logic

* test more PHP versions in CI

* update ci job name

* remove class name quoting in exceptions to match PHP behavior

* migrate pest config

* add comment to test

---------

Co-authored-by: Samuel Štancl <samuel@archte.ch>
Co-authored-by: Samuel Štancl <samuel.stancl@gmail.com>

.github/workflows/ci.yml

@@ -12,14 +12,24 @@ on:
 
 jobs:
   pest:
-    name: Tests (Pest) L${{ matrix.laravel }}
+    name: Tests (Pest) PHP${{ matrix.php }} L${{ matrix.laravel }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        laravel: [9, 10]
+        include:
+          - laravel: 10
+            php: 8.1
+          - laravel: 10
+            php: 8.2
+          - laravel: 10
+            php: 8.3
 
     steps:
     - uses: actions/checkout@v2
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{matrix.php}}
     - name: Install composer dependencies
       run: composer require "illuminate/support:^${{ matrix.laravel }}.0"
     - name: Run tests

README.md

@@ -8,6 +8,7 @@ A collection of enum helpers for PHP.
 - [`Options`](#options)
 - [`From`](#from)
 - [`Metadata`](#metadata)
+- [`Comparable`](#comparable)
 
 You can read more about the idea on [Twitter](https://twitter.com/archtechx/status/1495158228757270528). I originally wanted to include the `InvokableCases` helper in [`archtechx/helpers`](https://github.com/archtechx/helpers), but it makes more sense to make it a separate dependency and use it *inside* the other package.
 
@@ -366,6 +367,65 @@ enum TaskStatus: int
 
 And if you're using the same meta property in multiple enums, you can create a dedicated trait that includes this `@method` annotation.
 
+### Comparable
+
+This helper lets you compare enums by `is()`, `isNot()`, `in()` and `notIn()` operators.
+
+#### Apply the trait on your enum
+```php
+use ArchTech\Enums\Comparable;
+
+enum TaskStatus: int
+{
+    use Comparable;
+
+    case INCOMPLETE = 0;
+    case COMPLETED = 1;
+    case CANCELED = 2;
+}
+
+enum Role
+{
+    use Comparable;
+
+    case ADMINISTRATOR;
+    case SUBSCRIBER;
+    case GUEST;
+}
+```
+
+#### Use the `is()` method
+```php
+TaskStatus::INCOMPLETE->is(TaskStatus::INCOMPLETE); // true
+TaskStatus::INCOMPLETE->is(TaskStatus::COMPLETED); // false
+Role::ADMINISTRATOR->is(Role::ADMINISTRATOR); // true
+Role::ADMINISTRATOR->is(Role::NOBODY); // false
+```
+
+#### Use the `isNot()` method
+```php
+TaskStatus::INCOMPLETE->isNot(TaskStatus::INCOMPLETE); // false
+TaskStatus::INCOMPLETE->isNot(TaskStatus::COMPLETED); // true
+Role::ADMINISTRATOR->isNot(Role::ADMINISTRATOR); // false
+Role::ADMINISTRATOR->isNot(Role::NOBODY); // true
+```
+
+#### Use the `in()` method
+```php
+TaskStatus::INCOMPLETE->in([TaskStatus::INCOMPLETE, TaskStatus::COMPLETED]); // true
+TaskStatus::INCOMPLETE->in([TaskStatus::COMPLETED, TaskStatus::CANCELED]); // false
+Role::ADMINISTRATOR->in([Role::ADMINISTRATOR, Role::GUEST]); // true
+Role::ADMINISTRATOR->in([Role::SUBSCRIBER, Role::GUEST]); // false
+```
+
+#### Use the `notIn()` method
+```php
+TaskStatus::INCOMPLETE->notIn([TaskStatus::INCOMPLETE, TaskStatus::COMPLETED]); // false
+TaskStatus::INCOMPLETE->notIn([TaskStatus::COMPLETED, TaskStatus::CANCELED]); // true
+Role::ADMINISTRATOR->notIn([Role::ADMINISTRATOR, Role::GUEST]); // false
+Role::ADMINISTRATOR->notIn([Role::SUBSCRIBER, Role::GUEST]); // true
+```
+
 ## PHPStan
 
 To assist PHPStan when using invokable cases, you can include the PHPStan extensions into your own `phpstan.neon` file:

composer.json

@@ -23,10 +23,10 @@
         "php": "^8.1"
     },
     "require-dev": {
-        "orchestra/testbench": "^7.0|^8.0",
-        "pestphp/pest": "^1.2|^2.0",
-        "pestphp/pest-plugin-laravel": "^1.0|^2.0",
-        "larastan/larastan": "^1.0|^2.7.0"
+        "orchestra/testbench": "^8.0",
+        "larastan/larastan": "^2.4",
+        "pestphp/pest": "^2.0",
+        "pestphp/pest-plugin-laravel": "^2.0"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,

phpunit.xml

@@ -1,9 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" backupStaticAttributes="false" bootstrap="vendor/autoload.php" colors="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
-  <coverage processUncoveredFiles="true">
-    <include>
-      <directory suffix=".php">./src</directory>
-    </include>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" bootstrap="vendor/autoload.php" colors="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" cacheDirectory=".phpunit.cache" backupStaticProperties="false">
+  <coverage>
     <report>
       <clover outputFile="coverage/phpunit/clover.xml"/>
       <html outputDirectory="coverage/phpunit/html" lowUpperBound="35" highLowerBound="70"/>
@@ -22,12 +19,15 @@
     <env name="MAIL_DRIVER" value="array"/>
     <env name="QUEUE_CONNECTION" value="sync"/>
     <env name="SESSION_DRIVER" value="array"/>
-
     <env name="DB_CONNECTION" value="testbench"/>
     <env name="DB_DATABASE" value="main"/>
     <!-- <env name="DB_CONNECTION" value="sqlite"/> -->
     <!-- <env name="DB_DATABASE" value=":memory:"/> -->
-
     <env name="AWS_DEFAULT_REGION" value="us-west-2"/>
   </php>
+  <source>
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </source>
 </phpunit>

src/Comparable.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ArchTech\Enums;
+
+use Exception;
+use Iterator;
+use IteratorAggregate;
+
+trait Comparable
+{
+    public function is(mixed $enum): bool
+    {
+        return $this === $enum;
+    }
+
+    public function isNot(mixed $enum): bool
+    {
+        return ! $this->is($enum);
+    }
+
+    public function in(array|object $enums): bool
+    {
+        $iterator = $enums;
+
+        if (! is_array($enums)) {
+            if ($enums instanceof Iterator) {
+                $iterator = $enums;
+            } elseif ($enums instanceof IteratorAggregate) {
+                $iterator = $enums->getIterator();
+            } else {
+                throw new Exception('in() expects an iterable value');
+            }
+        }
+
+        foreach ($iterator as $item) {
+            if ($item === $this) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function notIn(array|object $enums): bool
+    {
+        return ! $this->in($enums);
+    }
+}

src/From.php

@@ -37,7 +37,7 @@ trait From
      */
     public static function fromName(string $case): static
     {
-        return static::tryFromName($case) ?? throw new ValueError('"' . $case . '" is not a valid name for enum "' . static::class . '"');
+        return static::tryFromName($case) ?? throw new ValueError('"' . $case . '" is not a valid name for enum ' . static::class . '');
     }
 
     /**

tests/Pest.php

@@ -1,6 +1,6 @@
 <?php
 
-use ArchTech\Enums\{InvokableCases, Options, Names, Values, From, Metadata};
+use ArchTech\Enums\{Comparable, InvokableCases, Options, Names, Values, From, Metadata};
 use ArchTech\Enums\Meta\Meta;
 use ArchTech\Enums\Meta\MetaProperty;
 
@@ -36,7 +36,7 @@ class Instructions extends MetaProperty
 #[Meta(Color::class, Desc::class)] // variadic syntax
 enum Status: int
 {
-    use InvokableCases, Options, Names, Values, From, Metadata;
+    use InvokableCases, Options, Names, Values, From, Metadata, Comparable;
 
     #[Color('orange')] #[Desc('Incomplete task')]
     case PENDING = 0;
@@ -49,7 +49,7 @@ enum Status: int
 #[Meta([Color::class, Desc::class, Instructions::class])] // array
 enum Role
 {
-    use InvokableCases, Options, Names, Values, From, Metadata;
+    use InvokableCases, Options, Names, Values, From, Metadata, Comparable;
 
     #[Color('indigo')]
     #[Desc('Administrator')]

tests/Pest/ComparableTest.php

@@ -0,0 +1,44 @@
+<?php
+
+test('the is method checks for equality', function () {
+    expect(Status::PENDING->is(Status::PENDING))->toBeTrue();
+    expect(Status::PENDING->is(Status::DONE))->toBeFalse();
+    expect(Role::ADMIN->is(Role::ADMIN))->toBeTrue();
+
+    expect(Role::ADMIN->is(Role::GUEST))->toBeFalse();
+    expect(Role::ADMIN->is('admin'))->toBeFalse();
+});
+
+it('the isNot method checks for inequality', function () {
+    expect(Status::PENDING->isNot(Status::DONE))->toBeTrue();
+    expect(Status::PENDING->isNot(Status::PENDING))->toBeFalse();
+    expect(Status::PENDING->isNot(Role::ADMIN))->toBeTrue();
+    expect(Role::ADMIN->isNot(Role::GUEST))->toBeTrue();
+
+    expect(Role::ADMIN->isNot(Role::ADMIN))->toBeFalse();
+    expect(Role::ADMIN->isNot('admin'))->toBeTrue();
+});
+
+it('the in method checks for presence in an array', function () {
+    expect(Status::PENDING->in([Status::PENDING, Status::DONE]))->toBeTrue();
+    expect(Role::ADMIN->in([Role::ADMIN]))->toBeTrue();
+
+    expect(Status::PENDING->in([Status::DONE]))->toBeFalse();
+    expect(Status::PENDING->in([Role::ADMIN, Role::GUEST]))->toBeFalse();
+});
+
+it('the not in method checks for absence in an array', function () {
+    expect(Status::PENDING->notIn([Status::DONE]))->toBeTrue();
+    expect(Role::ADMIN->notIn([Role::GUEST]))->toBeTrue();
+
+    expect(Status::PENDING->notIn([Status::PENDING, Status::DONE]))->toBeFalse();
+    expect(Role::ADMIN->notIn([Role::ADMIN, Role::GUEST]))->toBeFalse();
+});
+
+test('the in and notIn methods work with Laravel collections', function () {
+    expect(Status::PENDING->in(collect([Status::PENDING, Status::DONE])))->toBeTrue();
+    expect(Role::ADMIN->in(collect([Status::PENDING, Role::GUEST])))->toBeFalse();
+
+    expect(Status::DONE->notIn(collect([Status::PENDING])))->toBeTrue();
+    expect(Role::ADMIN->notIn(collect([Role::ADMIN, Status::PENDING])))->toBeFalse();
+});

tests/Pest/FromTest.php

@@ -4,9 +4,12 @@ it('does not override the default BackedEnum from method')
     ->expect(Status::from(0))
     ->toBe(Status::PENDING);
 
+// Shortened exception message due to inconsistency between PHP 8.1 and 8.2+
+// 8.1:  2 is not a valid backing value for enum "Status"
+// 8.2+: 2 is not a valid backing value for enum Status
 it('does not override the default BackedEnum from method with errors', function () {
     Status::from(2);
-})->throws(ValueError::class, '2 is not a valid backing value for enum "Status"');
+})->throws(ValueError::class, '2 is not a valid backing value for enum');
 
 it('does not override the default BackedEnum tryFrom method')
     ->expect(Status::tryFrom(1))
@@ -22,7 +25,7 @@ it('can select a case by name with from() for pure enums')
 
 it('throws a value error when selecting a non-existent case with from() for pure enums', function () {
     Role::from('NOBODY');
-})->throws(ValueError::class, '"NOBODY" is not a valid name for enum "Role"');
+})->throws(ValueError::class, '"NOBODY" is not a valid name for enum Role');
 
 it('can select a case by name with tryFrom() for pure enums')
     ->expect(Role::tryFrom('GUEST'))
@@ -38,7 +41,7 @@ it('can select a case by name with fromName() for pure enums')
 
 it('throws a value error when selecting a non-existent case by name with fromName() for pure enums', function () {
     Role::fromName('NOBODY');
-})->throws(ValueError::class, '"NOBODY" is not a valid name for enum "Role"');
+})->throws(ValueError::class, '"NOBODY" is not a valid name for enum Role');
 
 it('can select a case by name with tryFromName() for pure enums')
     ->expect(Role::tryFromName('GUEST'))
@@ -54,7 +57,7 @@ it('can select a case by name with fromName() for backed enums')
 
 it('throws a value error when selecting a non-existent case by name with fromName() for backed enums', function () {
     Status::fromName('NOTHING');
-})->throws(ValueError::class, '"NOTHING" is not a valid name for enum "Status"');
+})->throws(ValueError::class, '"NOTHING" is not a valid name for enum Status');
 
 it('can select a case by name with tryFromName() for backed enums')
     ->expect(Status::tryFromName('DONE'))