autotel/dist/test-span-collector.cjs.map

Write Once, Observe Anywhere

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* TestSpanCollector — SpanExporter that groups finished spans by traceId\n * and drains per-trace for embedding in test metadata.\n *\n * @example\n * ```typescript\n * import { TestSpanCollector } from 'autotel/test-span-collector';\n * import { SimpleSpanProcessor } from 'autotel/processors';\n * import { getAutotelTracerProvider } from 'autotel';\n *\n * const collector = new TestSpanCollector();\n * const provider = getAutotelTracerProvider();\n * provider.addSpanProcessor(new SimpleSpanProcessor(collector));\n *\n * // After a test span ends:\n * const spans = collector.drainTrace(traceId, rootSpanId);\n * // spans contains only descendants of rootSpanId\n * ```\n */\n\nimport type { SpanExporter, ReadableSpan } from '@opentelemetry/sdk-trace-base';\nimport { SpanStatusCode } from '@opentelemetry/api';\n\n/** @see ExportResultCode from @opentelemetry/core */\nconst ExportResultCode = { SUCCESS: 0, FAILED: 1 } as const;\n\n/** Attribute value types that survive serialization */\ntype SerializableValue =\n  | string\n  | number\n  | boolean\n  | string[]\n  | number[]\n  | boolean[];\n\n/**\n * Portable serialized span for embedding in test metadata.\n * `startTimeMs` is derived from OTel HrTime — epoch-based wall-clock ms in the current SDK.\n *\n * Defined as a `type` (not `interface`) so it is assignable to\n * `Record<string, unknown>` in TypeScript 6+ strict mode.\n */\nexport type SerializedSpan = {\n  spanId: string;\n  parentSpanId?: string;\n  name: string;\n  startTimeMs: number;\n  durationMs: number;\n  status: 'ok' | 'error' | 'unset';\n  statusMessage?: string;\n  attributes?: Record<string, SerializableValue>;\n};\n\nexport class TestSpanCollector implements SpanExporter {\n  private traces = new Map<string, ReadableSpan[]>();\n\n  export(\n    spans: ReadableSpan[],\n    callback: (result: { code: number }) => void,\n  ): void {\n    for (const span of spans) {\n      const traceId = span.spanContext().traceId;\n      let list = this.traces.get(traceId);\n      if (!list) {\n        list = [];\n        this.traces.set(traceId, list);\n      }\n      list.push(span);\n    }\n    callback({ code: ExportResultCode.SUCCESS });\n  }\n\n  /**\n   * Drain and serialize spans that are descendants of `rootSpanId` within `traceId`.\n   * Filters to the subtree rooted at the test span to prevent cross-test mixing.\n   * Removes the entire traceId entry from the collector.\n   */\n  drainTrace(traceId: string, rootSpanId: string): SerializedSpan[] {\n    const allSpans = this.traces.get(traceId);\n    this.traces.delete(traceId);\n    if (!allSpans?.length) return [];\n\n    // Build spanId → span index for efficient parent-chain walking\n    const byId = new Map<string, ReadableSpan>();\n    for (const s of allSpans) byId.set(s.spanContext().spanId, s);\n\n    // Filter to spans that are the root or descendants of rootSpanId\n    const included = allSpans.filter((s) => {\n      let id: string | undefined = s.spanContext().spanId;\n      while (id) {\n        if (id === rootSpanId) return true;\n        const parent = byId.get(id);\n        const parentId = parent?.parentSpanContext?.spanId || undefined;\n        if (parentId === id) break; // cycle guard\n        id = parentId;\n      }\n      return false;\n    });\n\n    return included.map((s) => serializeSpan(s));\n  }\n\n  shutdown(): Promise<void> {\n    this.traces.clear();\n    return Promise.resolve();\n  }\n\n  forceFlush(): Promise<void> {\n    return Promise.resolve();\n  }\n}\n\nfunction hrTimeToMs(hr: [number, number]): number {\n  return hr[0] * 1000 + hr[1] / 1_000_000;\n}\n\nfunction isSerializable(v: unknown): v is SerializableValue {\n  if (typeof v === 'string' || typeof v === 'number' || typeof v === 'boolean')\n    return true;\n  if (Array.isArray(v) && v.length > 0) {\n    const t = typeof v[0];\n    return (\n      (t === 'string' || t === 'number' || t === 'boolean') &&\n      v.every((e) => typeof e === t)\n    );\n  }\n  return false;\n}\n\nexport function serializeSpan(span: ReadableSpan): SerializedSpan {\n  const attrs: Record<string, SerializableValue> = {};\n  for (const [k, v] of Object.entries(span.attributes)) {\n    if (isSerializable(v)) attrs[k] = v;\n  }\n  return {\n    spanId: span.spanContext().spanId,\n    parentSpanId: span.parentSpanContext?.spanId || undefined,\n    name: span.name,\n    startTimeMs: hrTimeToMs(span.startTime as [number, number]),\n    durationMs: hrTimeToMs(span.duration as [number, number]),\n    status:\n      span.status.code === SpanStatusCode.ERROR\n        ? 'error'\n        : span.status.code === SpanStatusCode.OK\n          ? 'ok'\n          : 'unset',\n    statusMessage: span.status.message || undefined,\n    attributes: Object.keys(attrs).length > 0 ? attrs : undefined,\n  };\n}\n"]}