Add Comparator implementation

Author: msmakouz

src/Version/Comparator.php

@@ -12,9 +12,7 @@ final class Comparator implements ComparatorInterface
      */
     public function greaterThan(string $requested, string $installed): bool
     {
-        // TODO need implementation
-
-        return true;
+        return \version_compare($installed, $requested) >= 0;
     }
 
     /**
@@ -23,9 +21,7 @@ public function greaterThan(string $requested, string $installed): bool
      */
     public function lessThan(string $requested, string $installed): bool
     {
-        // TODO need implementation
-
-        return true;
+        return \version_compare($installed, $requested) <= 0;
     }
 
     /**
@@ -34,8 +30,6 @@ public function lessThan(string $requested, string $installed): bool
      */
     public function equal(string $requested, string $installed): bool
     {
-        // TODO need implementation
-
-        return true;
+        return \version_compare($installed, $requested) === 0;
     }
 }

tests/src/Unit/Version/ComparatorTest.php

@@ -0,0 +1,99 @@
+<?php
+
+declare(strict_types=1);
+
+namespace RoadRunner\VersionChecker\Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+use RoadRunner\VersionChecker\Version\Comparator;
+
+final class ComparatorTest extends TestCase
+{
+    /**
+     * @dataProvider greaterThanDataProvider
+     */
+    public function testGreaterThan(string $requested, string $installed, bool $expected): void
+    {
+        $comparator = new Comparator();
+
+        $this->assertSame($expected, $comparator->greaterThan($requested, $installed));
+    }
+
+    /**
+     * @dataProvider lessThanDataProvider
+     */
+    public function testLessThan(string $requested, string $installed, bool $expected): void
+    {
+        $comparator = new Comparator();
+
+        $this->assertSame($expected, $comparator->lessThan($requested, $installed));
+    }
+
+    /**
+     * @dataProvider equalDataProvider
+     */
+    public function testEqual(string $requested, string $installed, bool $expected): void
+    {
+        $comparator = new Comparator();
+
+        $this->assertSame($expected, $comparator->equal($requested, $installed));
+    }
+
+    public static function greaterThanDataProvider(): \Traversable
+    {
+        // requested version equal to installed version
+        yield ['1.0.0', '1.0.0', true];
+        // requested version less than installed version
+        yield ['1.0.0', '2.0.0', true];
+        // requested version greater than installed version
+        yield ['2.0.0', '1.0.0', false];
+        // requested version with same major and minor version as installed version, but greater patch version
+        yield ['1.0.1', '1.0.0', false];
+        // requested version with same major version as installed version, but greater minor version
+        yield ['1.1.0', '1.0.0', false];
+        // requested version with pre-release identifier
+        yield ['2.0.0-alpha', '2.0.0', true];
+        yield ['2.0.0-alpha', '2.0.0-beta', true];
+        yield ['2.0.0-alpha', '2.0.0-alpha.1', true];
+        yield ['2.0.0-alpha', '2.0.0-alpha', true];
+    }
+
+    public static function lessThanDataProvider(): \Traversable
+    {
+        // requested version equal to installed version
+        yield ['1.0.0', '1.0.0', true];
+        // requested version less than installed version
+        yield ['1.0.0', '2.0.0', false];
+        // requested version greater than installed version
+        yield ['2.0.0', '1.0.0', true];
+        // requested version with same major and minor version as installed version, but greater patch version
+        yield ['1.0.1', '1.0.0', true];
+        // requested version with same major version as installed version, but greater minor version
+        yield ['1.1.0', '1.0.0', true];
+        // requested version with pre-release identifier
+        yield ['2.0.0-alpha', '2.0.0', false];
+        yield ['2.0.0-alpha', '2.0.0-beta', false];
+        yield ['2.0.0-alpha', '2.0.0-alpha.1', false];
+        yield ['2.0.0-alpha', '2.0.0-alpha', true];
+    }
+
+    public static function equalDataProvider(): \Traversable
+    {
+        // requested version equal to installed version
+        yield ['1.0.0', '1.0.0', true];
+        // requested version less than installed version
+        yield ['1.0.0', '2.0.0', false];
+        // requested version greater than installed version
+        yield ['2.0.0', '1.0.0', false];
+        // requested version with same major and minor version as installed version, but greater patch version
+        yield ['1.0.1', '1.0.0', false];
+        // requested version with same major version as installed version, but greater minor version
+        yield ['1.1.0', '1.0.0', false];
+        // requested version with pre-release identifier
+        yield ['2.0.0-alpha', '2.0.0', false];
+        yield ['2.0.0-alpha', '2.0.0-beta', false];
+        yield ['2.0.0-alpha', '2.0.0-alpha.1', false];
+        yield ['2.0.0-alpha', '2.0.0-alpha', true];
+        yield ['2.0.0-alpha.1', '2.0.0-alpha.1', true];
+    }
+}