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fix(@angular/build): suggest the istanbul provider in the unit-test V8 browser coverage error #34484

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Merged
clydin merged 1 commit into from
Oct 22, 2026
+7 −1
Merged

fix(@angular/build): suggest the istanbul provider in the unit-test V8 browser coverage error #34484

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3 changes: 2 additions & 1 deletion packages/angular/build/src/builders/unit-test/runners/vitest/plugins.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -529,7 +529,8 @@ function validateBrowserCoverage(
`Code coverage is enabled, but the following configured browsers do not support the V8 coverage provider: ` +
`${unsupportedBrowsers.join(', ')}. ` +
`V8 coverage is only supported on Chromium-based browsers (e.g., Chrome, Chromium, Edge). ` +
`Please disable coverage or remove the unsupported browsers.`,
`Please use the "istanbul" coverage provider (requires "@vitest/coverage-istanbul"), ` +
`remove the unsupported browsers, or disable coverage.`,
);
}
}
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5 changes: 5 additions & 0 deletions tests/e2e/tests/vitest/browser-coverage-validation.ts
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Expand Up @@ -67,6 +67,11 @@ export default async function (): Promise<void> {
/Code coverage is enabled, but the following configured browsers do not support the V8 coverage provider: firefox/,
'Expected validation error for unsupported browser with coverage (config name).',
);
assert.match(
output2,
/Please use the "istanbul" coverage provider/,
'Expected the error to suggest the istanbul coverage provider.',
);

// === Case 3: Browser configured via vitest.config.mts (instances) ===
await writeFile(
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