1 files changed, 53 insertions, 0 deletions
diff --git a/tests/SequenceTest.php b/tests/SequenceTest.php
new file mode 100644
index 0000000..fc02d87
--- /dev/null
+++ b/tests/SequenceTest.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Zhineng\Snowflake\Tests;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use Zhineng\Snowflake\Sequence;
+
+#[CoversClass(Sequence::class)]
+final class SequenceTest extends TestCase
+{
+    public function testSequenceCanBeInitialized(): void
+    {
+        $seq = new Sequence('sequence', 12);
+        $this->assertSame('sequence', $seq->name);
+        $this->assertSame(12, $seq->bits);
+    }
+
+    public function testSequenceHasMakeFactoryMethod(): void
+    {
+        $seq = Sequence::make('sequence', 12);
+        $this->assertSame('sequence', $seq->name);
+        $this->assertSame(12, $seq->bits);
+    }
+
+    public function testNextValueResolution(): void
+    {
+        $seq = new Sequence('sequence', 12);
+        $this->assertSame(0, $seq->next());
+        $this->assertSame(1, $seq->next());
+        $this->assertSame(2, $seq->next());
+    }
+
+    public function testExceptionShouldBeThrownWhenMaxValueExceeded(): void
+    {
+        $seq = new Sequence('sequence', 1); // Max value is 1
+        $this->assertSame(0, $seq->next());
+        $this->assertSame(1, $seq->next());
+        $this->expectException(\OverflowException::class);
+        $this->expectExceptionMessage('Sequence "sequence" exceeded its maximum value of 1.');
+        $seq->next();
+    }
+
+    public function testSequenceCanBeReset(): void
+    {
+        $seq = new Sequence('sequence', 12);
+        $this->assertSame(0, $seq->next());
+        $this->assertSame(1, $seq->next());
+        $this->assertSame(0, $seq->reset()->next());
+    }
+}