test: simplify changed test routing

scripts/test-projects.mjs

@@ -1,5 +1,6 @@
 import fs from "node:fs";
 import { performance } from "node:perf_hooks";
+import { formatMs } from "./lib/check-timing-summary.mjs";
 import { acquireLocalHeavyCheckLockSync } from "./lib/local-heavy-check-runtime.mjs";
 import {
   isCiLikeEnv,
@@ -271,6 +272,7 @@ async function runVitestSpecsParallel(specs, concurrency) {
 }
 
 async function main() {
+  const suiteStartedAt = performance.now();
   const args = process.argv.slice(2);
   const baseEnv = resolveLocalVitestEnv(process.env);
   const { targetArgs } = parseTestProjectsArgs(args, process.cwd());
@@ -309,6 +311,7 @@ async function main() {
 
   if (runSpecs.length === 0) {
     console.error("[test] no changed test targets; skipping Vitest.");
+    printTestSummary("skipped", 0, performance.now() - suiteStartedAt);
     return;
   }
 
@@ -360,8 +363,11 @@ async function main() {
         concurrency,
       );
       writeShardTimings(timings, process.cwd(), baseEnv);
-      console.error(
-        `[test] completed ${parallelSpecs.length} Vitest shards; Vitest summaries above are per-shard, not aggregate totals.`,
+      printTestSummary(
+        parallelExitCode === 0 ? "passed" : "failed",
+        parallelSpecs.length,
+        performance.now() - suiteStartedAt,
+        "Vitest summaries above are per-shard, not aggregate totals.",
       );
       releaseLockOnce();
       if (parallelExitCode !== 0) {
@@ -378,18 +384,24 @@ async function main() {
     if (!result) {
       return;
     }
+    if (result.timing) {
+      timings.push(result.timing);
+    }
     if (result.code !== 0) {
       exitCode = exitCode || result.code;
       if (spec.continueOnFailure !== true) {
+        printTestSummary("failed", timings.length, performance.now() - suiteStartedAt);
         releaseLockOnce();
         process.exit(result.code);
       }
     }
-    if (result.timing) {
-      timings.push(result.timing);
-    }
   }
   writeShardTimings(timings, process.cwd(), baseEnv);
+  printTestSummary(
+    exitCode === 0 ? "passed" : "failed",
+    timings.length,
+    performance.now() - suiteStartedAt,
+  );
 
   releaseLockOnce();
   if (exitCode !== 0) {
@@ -397,6 +409,13 @@ async function main() {
   }
 }
 
+function printTestSummary(status, shardCount, durationMs, detail) {
+  const suffix = detail ? `; ${detail}` : "";
+  console.error(
+    `[test] ${status} ${shardCount} Vitest shard${shardCount === 1 ? "" : "s"} in ${formatMs(durationMs)}${suffix}`,
+  );
+}
+
 main().catch((error) => {
   releaseLockOnce();
   console.error(error);