pi-ext

export function scriptedProvider(steps) {
	let index = 0;
	return {
		next() {
			if (index >= steps.length) throw new Error("scripted provider exhausted");
			return steps[index++];
		},
		complete() {
			if (index !== steps.length)
				throw new Error(
					`scripted provider left ${steps.length - index} step(s)`,
				);
		},
	};
}