Added Date::isNotBefore

src/Date.php

@@ -71,6 +71,11 @@ public function isBefore(self $date): bool
         return $this->toDateTimeImmutable() < $date->toDateTimeImmutable();
     }
 
+    public function isNotBefore(self $date): bool
+    {
+        return !($this->toDateTimeImmutable() < $date->toDateTimeImmutable());
+    }
+
     public function isBeforeOrEqualTo(self $date): bool
     {
         return $this->toDateTimeImmutable() <= $date->toDateTimeImmutable();

tests/Date/IsNotBeforeTest.php

@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DigitalCraftsman\DateTimeParts\Date;
+
+use DigitalCraftsman\DateTimeParts\Date;
+use PHPUnit\Framework\TestCase;
+
+/** @coversDefaultClass \DigitalCraftsman\DateTimeParts\Date */
+final class IsNotBeforeTest extends TestCase
+{
+    /**
+     * @test
+     *
+     * @dataProvider dataProvider
+     *
+     * @covers ::isNotBefore
+     */
+    public function is_not_before_works(
+        bool $expectedResult,
+        Date $date,
+        Date $comparator,
+    ): void {
+        // -- Act & Assert
+        self::assertSame($expectedResult, $date->isNotBefore($comparator));
+    }
+
+    /**
+     * @return array<string, array{
+     *   0: boolean,
+     *   1: Date,
+     *   2: Date,
+     * }>
+     */
+    public function dataProvider(): array
+    {
+        return [
+            'previous year' => [
+                true,
+                Date::fromString('2022-10-08'),
+                Date::fromString('2021-10-08'),
+            ],
+            'same date' => [
+                true,
+                Date::fromString('2022-10-08'),
+                Date::fromString('2022-10-08'),
+            ],
+            'next year' => [
+                false,
+                Date::fromString('2022-10-08'),
+                Date::fromString('2023-10-08'),
+            ],
+            'next month' => [
+                false,
+                Date::fromString('2022-10-08'),
+                Date::fromString('2022-11-08'),
+            ],
+            'next day' => [
+                false,
+                Date::fromString('2022-10-08'),
+                Date::fromString('2022-10-09'),
+            ],
+        ];
+    }
+}