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test(jest): use a folder below a file for the unwritable diagnostics case #302

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test(jest): use a folder below a file for the unwritable diagnostics case #302

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7 changes: 6 additions & 1 deletion packages/jest/src/diagnostics/__tests__/report.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -562,16 +562,21 @@ describe('createDiagnosticsAppender', () => {
});

it('never throws when the directory cannot be written', async () => {
// A folder below a regular file cannot be created on any platform. On
// Windows, `/dev/null/nope` is an ordinary folder at the drive root.
const file = path.join(projectRoot, 'file');
await fs.writeFile(file, '');
const diagnostics = createDiagnostics({ enabled: true });
const appender = createDiagnosticsAppender(diagnostics, {
projectRoot: '/dev/null/nope',
projectRoot: path.join(file, 'nope'),
id: 'unwritable',
});

diagnostics.mark('a');
expect(() => appender.flush()).not.toThrow();
diagnostics.mark('b');
await expect(appender.dispose()).resolves.toBeUndefined();
expect(await exists(appender.filePath)).toBe(false);
});
});

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