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fix(browser): hide injected data-testid attributes #9503

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Merged
sheremet-va merged 2 commits into from
Jan 22, 2026
+18 −0
Merged

fix(browser): hide injected data-testid attributes #9503

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180b977
fix(browser): hide injected data-testid attributes
sheremet-va Jan 22, 2026
879f7f4
perf: check for _
sheremet-va Jan 22, 2026
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10 changes: 10 additions & 0 deletions packages/pretty-format/src/plugins/lib/markup.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,16 @@ export function printProps(
return keys
.map((key) => {
const value = props[key]
// hidden injected value that should not be printed
if (
typeof value === 'string'
&& value[0] === '_'
&& value.startsWith('__vitest_')
&& value.match(/__vitest_\d+__/)
) {
return ''
}

let printed = printer(value, config, indentationNext, depth, refs)

if (typeof value !== 'string') {
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8 changes: 8 additions & 0 deletions test/browser/test/snapshot.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12,3 +12,11 @@ test('file snapshot', async () => {
await expect('my snapshot content')
.toMatchFileSnapshot('./__snapshots__/custom/my_snapshot')
})

test('vitest attribute is hidden', () => {
const div = document.createElement('div')
div.setAttribute('data-testid', '__vitest_1__')
expect(div).toMatchInlineSnapshot(`
<div />
`)
})
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