From a49763dd739c3c68c4a8322896d594e926ac8e6b Mon Sep 17 00:00:00 2001
From: Zhineng Li <im@zhineng.li>
Date: Mon, 5 Jan 2026 16:26:11 +0800
Subject: first commit

---
 tests/ManagerTest.php | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 tests/ManagerTest.php

(limited to 'tests/ManagerTest.php')

diff --git a/tests/ManagerTest.php b/tests/ManagerTest.php
new file mode 100644
index 0000000..dc81a06
--- /dev/null
+++ b/tests/ManagerTest.php
@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Zhineng\Snowflake\Tests;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use Zhineng\Snowflake\Constant;
+use Zhineng\Snowflake\Field;
+use Zhineng\Snowflake\Manager;
+use Zhineng\Snowflake\Sequence;
+use Zhineng\Snowflake\Structure;
+use Zhineng\Snowflake\Timestamp;
+
+#[CoversClass(Manager::class)]
+final class ManagerTest extends TestCase
+{
+    public function testNextIdResolution(): void
+    {
+        $struct = new Structure;
+        $struct->add(Sequence::make('sequence', 12));
+        $struct->add(Constant::make('instance_id', 10));
+        $struct->add(Timestamp::make());
+
+        $manager = new Manager;
+        $manager->structureUsing($struct);
+        $this->assertNotSame($manager->nextId(), $manager->nextId());
+    }
+
+    public function testSequenceShouldBeResetWhenAnyOtherFieldChanges(): void
+    {
+        $struct = new Structure;
+        $struct->add(Sequence::make('sequence', 12));
+        $struct->add($field = new class ('test', 10) extends Field {
+            public int $value = 0;
+
+            public function value(): int
+            {
+                return $this->value;
+            }
+
+            public function setValue(int $value): void
+            {
+                $this->value = $value;
+            }
+        });
+
+        $manager = new Manager;
+        $manager->structureUsing($struct);
+
+        $id1 = $manager->nextId();
+        $id2 = $manager->nextId();
+        $field->setValue(1);
+        $id3 = $manager->nextId();
+
+        $sequenceMask = (1 << 12) - 1;
+        $this->assertSame(0, $id1 & $sequenceMask);
+        $this->assertSame(1, $id2 & $sequenceMask);
+        $this->assertSame(0, $id3 & $sequenceMask);
+    }
+
+    public function testExceptionShouldBeThrownWhenMissingStructure(): void
+    {
+        $manager = new Manager;
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessage('ID structure is not defined.');
+        $manager->nextId();
+    }
+}
-- 
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