Code coverage report for node/src/apm/prometheus/histogram.ts

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import {PromMetric, PromOptions} from './metric';
import {Histogram, HistogramFactory, Providers, Tags} from '@btilford/ts-base-core';
import {Histogram as Delegate, Registry} from 'prom-client';
 
 
export class PromHistogram extends PromMetric implements Histogram<number> {
  protected readonly impl: Delegate<any>;
 
 
  constructor(name: string, tags: Tags, options: PromOptions) {
    super(name, tags, options);
    this.impl = new Delegate({
      name: this.name,
      help: options.help,
      registers: options.registry || [Providers.provide(Registry)],
      aggregator: options.aggregator,
      labelNames: [...this.supportedLabels],
    });
  }
 
 
  set(value: number, tags: Tags = {}): void {
    const _tags = this.filterTags({ ...this.tags, ...tags });
    this.impl.observe(_tags, value);
  }
 
}
 
 
export class PromHistogramFactory extends HistogramFactory<number> {
  protected readonly options: PromOptions;
 
 
  constructor(options: PromOptions) {
    super();
    this.options = { ...options };
  }
 
 
  histogram(name: string, tags): Histogram<number> {
    return new PromHistogram(name, tags, this.options);
  }
 
}