Function getInsightOrError

front_end/testing/InsightHelpers.ts:76–91

(
    insightName: InsightName, insights: Trace.Insights.Types.TraceInsightSets,
    navigation?: Trace.Types.Events.NavigationStart)

}

export function getInsightOrError<InsightName extends keyof Trace.Insights.Types.InsightModels>(
    insightName: InsightName, insights: Trace.Insights.Types.TraceInsightSets,
    navigation?: Trace.Types.Events.NavigationStart): NonNullable<Trace.Insights.Types.InsightModels[InsightName]> {
  const insightSet = getInsightSetOrError(insights, navigation);
  const insight = insightSet.model[insightName];
  const error = insightSet.modelErrors[insightName];
  if (error) {
    // eslint-disable-next-line @typescript-eslint/only-throw-error
    throw error;
  }
  if (!insight) {
    throw new Error('missing insight');
  }

  return insight;
}

export function getFirstOrError<T>(iterator: IterableIterator<T>): T {
  const result = iterator.next();