Added test case for attribute-class-array

test/hydration/samples/attribute-class-array/_after.html

@@ -0,0 +1 @@
+<div class="bg-red text-white size-sm"></div>

test/hydration/samples/attribute-class-array/_before.html

@@ -0,0 +1 @@
+<div class="bg-red text-white size-sm"></div>

test/hydration/samples/attribute-class-array/_config.js

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+export default {
+	snapshot(target) {
+		const div = target.querySelector('div');
+
+		return {
+			div
+		};
+	},
+
+	test(assert, target, snapshot) {
+		const div = target.querySelector('div');
+
+		assert.equal(div, snapshot.div);
+	}
+};

test/hydration/samples/attribute-class-array/main.svelte

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+<script>
+  const collection = ['bg-red', 'text-white', 'size-sm'];
+</script>
+
+<div class={collection}></div>