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test: relax chunk count expectations #25415

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gireeshpunathil merged 1 commit into from
Jan 20, 2019
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test: relax chunk count expectations #25415

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test: relax chunk count expectations 
In parallel/test-fs-read-stream-concurrent-reads.js the number
of data chunks used is being tested when few concurrent reads
are performed. The number of chunks can fluctuate based on the
number of concurrent reads as well as the data that was read in
one shot. Accommodate these variations in the test.

Fixes: #22339

PR-URL: #25415
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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@gireeshpunathil
gireeshpunathil committed Jan 20, 2019
commit cc26957cc30d89619d3b9be85f5301111e17615a
8 changes: 4 additions & 4 deletions test/parallel/test-fs-read-stream-concurrent-reads.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ const fs = require('fs');
const filename = fixtures.path('loop.js'); // Some small non-homogeneous file.
const content = fs.readFileSync(filename);

const N = 1000;
const N = 2000;
let started = 0;
let done = 0;

Expand All @@ -26,10 +26,10 @@ function startRead() {
.on('data', (chunk) => {
chunks.push(chunk);
arrayBuffers.add(chunk.buffer);
if (started < N)
startRead();
})
.on('end', common.mustCall(() => {
if (started < N)
startRead();
assert.deepStrictEqual(Buffer.concat(chunks), content);
if (++done === N) {
const retainedMemory =
Expand All @@ -43,5 +43,5 @@ function startRead() {

// Don’t start the reads all at once – that way we would have to allocate
// a large amount of memory upfront.
for (let i = 0; i < 4; ++i)
for (let i = 0; i < 6; ++i)
startRead();