Sketchy form of jest query matcher against endpoint schema

Build_jest_expectation_from_schema.js

function traverseSchema(node) {
	// schema.getQueryType().getFields().Stock.type.getFields().data.type.ofType.getFields().adjustedClose.type.name
	if (node instanceof GraphQLSchema) {
		return {
			query: traverseSchema(node.getQueryType())
		}
	}
	if (node instanceof GraphQLList) {
		const check = traverseSchema(node.ofType);
		// console.log(check);
		return expect.arrayContaining([traverseSchema(node.ofType)]);
	}
	if (node instanceof GraphQLObjectType) {
		const fragment = {};
		Object.entries(node.getFields()).forEach(([name, field]) => {
			fragment[name] = traverseSchema(field)
		});
		return expect.objectContaining(fragment);
	}
	if (node instanceof GraphQLScalarType) {
		// return expect.toBeTypeOrNull()
		switch (node.name) {
			case "String":
				return expect.toBeTypeOrNull(String)
			case "Int":
				return expect.toBeTypeOrNull(Number)
			case "Float":
				return expect.toBeTypeOrNull(Number)
			case "Boolean":
				return expect.toBeTypeOrNull(Boolean)
			case "ID":
				return expect.toBeTypeOrNull(String)
			default:
				throw Error(`Undefined type! ${node}`)
		}
	}
	if (node instanceof Object) {
		return traverseSchema(node.type);
	}
}