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test(metrics): isolate snapshot read byte accounting

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Count only positional reads from the cost-log descriptor and use actual bytes returned, so the bounded-read assertions remain deterministic under full-suite concurrency.
This commit is contained in:
wellkilo
2026-09-13 05:08:23 +08:00
parent 987c1e103f
commit e9302928d0
1 changed files with 10 additions and 4 deletions
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tests/hooks/ecc-metrics-bridge.test.js
+10 -4
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@@ -271,8 +271,11 @@ function runTests() {
appendSessionCostRow(metricsDir, 'S1', snapshotRow);
fs.readSync = function measuredRead(descriptor, buffer, offset, length, position) {
bytesReadFromCostLog += length;
return originalReadSync.call(this, descriptor, buffer, offset, length, position);
const bytesRead = originalReadSync.call(
this, descriptor, buffer, offset, length, position
);
if (Number.isSafeInteger(position)) bytesReadFromCostLog += bytesRead;
return bytesRead;
};
const result = readSessionCost('S1');
@@ -329,8 +332,11 @@ function runTests() {
const originalReadSync = fs.readSync;
let bytesReadFromCostLog = 0;
fs.readSync = function measuredRead(descriptor, buffer, offset, length, position) {
bytesReadFromCostLog += length;
return originalReadSync.call(this, descriptor, buffer, offset, length, position);
const bytesRead = originalReadSync.call(
this, descriptor, buffer, offset, length, position
);
if (Number.isSafeInteger(position)) bytesReadFromCostLog += bytesRead;
return bytesRead;
};
try {
assert.deepStrictEqual(readSessionCost('S1'), { totalCost: 1, totalIn: 100, totalOut: 50 });