Function seedInitialMetadata

site/src/hooks/useEmbeddedMetadata.test.ts:138–170

(metadataKey: string)

};

function seedInitialMetadata(metadataKey: string): () => void {
	// Enforcing this to make sure that even if we start to adopt more concurrent
	// tests through Vitest (or similar), there's no risk of global state causing
	// weird, hard-to-test false positives/negatives with other tests
	if (metadataKey === DEFAULT_METADATA_KEY) {
		throw new Error(
			"Please ensure that the key you provide does not match the key used throughout the majority of the application",
		);
	}

	const trackedNodes = new Set<Element>();
	allAppendedNodes.add(trackedNodes);

	for (const metadataName in mockDataForTags) {
		// Serializing first because that's the part that can fail; want to fail
		// early if possible
		const value = mockDataForTags[metadataName as keyof typeof mockDataForTags];
		const serialized = JSON.stringify(value);

		const newNode = document.createElement("meta");
		newNode.setAttribute(metadataKey, metadataName);
		newNode.setAttribute("content", serialized);
		document.head.append(newNode);

		trackedNodes.add(newNode);
	}

	return () => {
		for (const node of trackedNodes) {
			node.remove();
		}
	};
}

function renderMetadataHook(metadataKey: string) {
	const manager = new MetadataManager(metadataKey);