Enhancement: Implement Version

.github/workflows/integrate.yaml

@@ -59,7 +59,7 @@ jobs:
           dependencies: "${{ matrix.dependencies }}"
 
       - name: "Run backward-compatibility analysis with roave/backward-compatibility-check"
-        run: "vendor/bin/roave-backward-compatibility-check --ansi --format=github-actions --from=64ced12"
+        run: "vendor/bin/roave-backward-compatibility-check --ansi --format=github-actions --from=6e3389d"
 
   code-coverage:
     name: "Code Coverage"

CHANGELOG.md

@@ -8,4 +8,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`64ced12...main`][64ced12...main].
 
+### Added
+
+- Added `Version` as a value object ([#1]), by [@localheinz]
+
 [64ced12...main]: https://github.com/ergebnis/version/compare/64ced12...main
+
+[#1]: https://github.com/ergebnis/version/pull/1
+
+[@localheinz]: https://github.com/localheinz

Makefile

@@ -3,7 +3,7 @@ it: refactoring coding-standards security-analysis static-code-analysis tests ##
 
 .PHONY: backward-compatibility-analysis
 backward-compatibility-analysis: vendor ## Runs a backward-compatibility analysis with roave/backward-compatibility-check
-	vendor/bin/roave-backward-compatibility-check --from=64ced12
+	vendor/bin/roave-backward-compatibility-check --from=6e3389d
 
 .PHONY: code-coverage
 code-coverage: vendor ## Collects coverage from running unit tests with phpunit/phpunit

README.md

@@ -26,7 +26,34 @@ composer require ergebnis/version
 
 ## Usage
 
-💡 This is a great place for showing a few usage examples!
+### Create a `Version` from a `string`
+
+```php
+<?php
+
+declare(strict_types=1);
+
+use Ergebnis\Version;
+
+$version = Version\Version::fromString('1.2.3');
+```
+
+### Compare a `Version` to another `Version`
+
+```php
+<?php
+
+declare(strict_types=1);
+
+use Ergebnis\Version;
+
+$one = Version\Version::fromString('1.2.3');
+$two = Version\Version::fromString('1.2.3');
+$three = Version\Version::fromString('1.2.4');
+
+$one->equals($two); // true
+$one->equals($three); // false
+```
 
 ## Changelog
 

psalm-baseline.xml

@@ -1,2 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="5.18.0@b113f3ed0259fd6e212d87c3df80eec95a6abf19"/>
+<files psalm-version="5.18.0@b113f3ed0259fd6e212d87c3df80eec95a6abf19">
+  <file src="test/Unit/VersionTest.php">
+    <PossiblyUnusedMethod>
+      <code>provideInvalidValue</code>
+      <code>provideValidValue</code>
+    </PossiblyUnusedMethod>
+  </file>
+</files>

src/Example.php → src/Exception/InvalidVersion.php

@@ -11,21 +11,15 @@
  * @see https://github.com/ergebnis/version
  */
 
-namespace Ergebnis\Version;
+namespace Ergebnis\Version\Exception;
 
-final class Example
+final class InvalidVersion extends \InvalidArgumentException
 {
-    private function __construct(private readonly string $value)
-    {
-    }
-
     public static function fromString(string $value): self
     {
-        return new self($value);
-    }
-
-    public function toString(): string
-    {
-        return $this->value;
+        return new self(\sprintf(
+            'Value "%s" does not appear to be valid.',
+            $value,
+        ));
     }
 }

src/Version.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2023 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/version
+ */
+
+namespace Ergebnis\Version;
+
+final class Version
+{
+    /**
+     * @see https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
+     * @see https://regex101.com/r/Ly7O1x/3/
+     */
+    private const REGEX = '/^(?P<major>0|[1-9]\d*)\.(?P<minor>0|[1-9]\d*)\.(?P<patch>0|[1-9]\d*)(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+(?P<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$/';
+
+    private function __construct(private readonly string $value)
+    {
+    }
+
+    /**
+     * @throws Exception\InvalidVersion
+     */
+    public static function fromString(string $value): self
+    {
+        if (1 !== \preg_match(self::REGEX, $value)) {
+            throw Exception\InvalidVersion::fromString($value);
+        }
+
+        return new self($value);
+    }
+
+    public function toString(): string
+    {
+        return $this->value;
+    }
+
+    public function equals(self $other): bool
+    {
+        return $this->value === $other->value;
+    }
+}

test/Unit/Exception/InvalidVersionTest.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2023 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/version
+ */
+
+namespace Ergebnis\Version\Test\Unit\Exception;
+
+use Ergebnis\Version\Exception;
+use Ergebnis\Version\Test;
+use PHPUnit\Framework;
+
+#[Framework\Attributes\CoversClass(Exception\InvalidVersion::class)]
+final class InvalidVersionTest extends Framework\TestCase
+{
+    use Test\Util\Helper;
+
+    public function testFromStringReturnsException(): void
+    {
+        $value = self::faker()->word();
+
+        $exception = Exception\InvalidVersion::fromString($value);
+
+        $message = \sprintf(
+            'Value "%s" does not appear to be valid.',
+            $value,
+        );
+
+        self::assertSame($message, $exception->getMessage());
+    }
+}