Adds unit tests

3 files changed, 13 insertions, 5 deletions

diff --git a/lib/leftpadesque/debug.ts b/lib/leftpadesque/debug.ts
index 074e567..f381540 100644
--- a/lib/leftpadesque/debug.ts
+++ b/lib/leftpadesque/debug.ts
@@ -4,5 +4,6 @@ const _env: 'development' | 'production' =
     _hasEnv && (process.env.ENVIRONMENT ?? '').toLowerCase().includes('prod') ? 'production' : 'development';
 export const isProd = () => _env === 'production';
 
-const _debug = !isProd() || (_hasEnv && ['y', 't'].some((process.env.DEBUG ?? '').toLowerCase().startsWith));
+const _debugEnv = (process.env.DEBUG ?? '').toLowerCase();
+const _debug = !isProd() || (_hasEnv && ['y', 't'].some((prefix) => _debugEnv.startsWith(prefix)));
 export const isDebug = () => _debug;
diff --git a/lib/process/exec.ts b/lib/process/exec.ts
index f8d572c..3a934b3 100644
--- a/lib/process/exec.ts
+++ b/lib/process/exec.ts
@@ -7,7 +7,7 @@ import {
     Metric,
     TraceUtil,
 } from '@emprespresso/pengueno';
-import { exec } from 'node:child_process';
+import * as child_process from 'node:child_process';
 
 export type Command = string[] | string;
 export type StdStreams = { stdout: string; stderr: string };
@@ -28,7 +28,7 @@ export const getStdout = (
             const env = options.clearEnv ? options.env : { ...process.env, ...options.env };
             return Either.fromFailableAsync<Error, StdStreams>(
                 new Promise<StdStreams>((res, rej) => {
-                    const proc = exec(_exec, { env });
+                    const proc = child_process.exec(_exec, { env });
                     let stdout = '';
                     proc.stdout?.on('data', (d: Buffer) => {
                         const s = d.toString();
diff --git a/lib/trace/metric/trace.ts b/lib/trace/metric/trace.ts
index b28d828..396bd9c 100644
--- a/lib/trace/metric/trace.ts
+++ b/lib/trace/metric/trace.ts
@@ -16,9 +16,16 @@ export class MetricsTrace implements ITrace<MetricsTraceSupplier> {
     public traceScope(trace: MetricsTraceSupplier): MetricsTrace {
         const now = Date.now();
         const metricsToTrace = (Array.isArray(trace) ? trace : [trace]).filter(isIMetric);
-        const initialTraces = new Map(metricsToTrace.map((metric) => [metric.name, now]));
 
-        return new MetricsTrace(this.metricConsumer, initialTraces, this.completedTraces);
+        // Inherit existing active traces across scopes.
+        const nextActiveTraces = new Map(this.activeTraces);
+        for (const metric of metricsToTrace) {
+            if (!nextActiveTraces.has(metric.name)) {
+                nextActiveTraces.set(metric.name, now);
+            }
+        }
+
+        return new MetricsTrace(this.metricConsumer, nextActiveTraces, this.completedTraces);
     }
 
     public trace(metrics: MetricsTraceSupplier): MetricsTrace {