タグを保存前に正規化する

tests/Unit/MetadataResolver/MetadataTest.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Tests\Unit\MetadataResolver;
+
+use App\MetadataResolver\Metadata;
+use Tests\TestCase;
+
+class MetadataTest extends TestCase
+{
+    public function testNormalizedTagsCanTrim()
+    {
+        $metadata = new Metadata();
+        $metadata->tags = ['foo ', ' bar', ' foo bar '];
+
+        $this->assertEquals(['foo', 'bar', 'foo bar'], $metadata->normalizedTags());
+    }
+
+    public function testNormalizedTagsCanSanitize()
+    {
+        $metadata = new Metadata();
+        $metadata->tags = ["foo \n", " \nbar", " foo\n bar "];
+
+        $this->assertEquals(['foo', 'bar', 'foo  bar'], $metadata->normalizedTags());
+    }
+
+    public function testNormalizedTagsCanDeduplication()
+    {
+        $metadata = new Metadata();
+        $metadata->tags = ['foo ', ' foo', ' bar'];
+
+        $this->assertEquals(['foo', 'bar'], $metadata->normalizedTags());
+    }
+}