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Here’s an example of a custom eslint rule that detects usage of the knex
library in a unit test file and reports it as a linter error.
module.exports = {
rules: {
'no-db-unit-tests': {
create: function (context) {
return {
ImportDeclaration(node) {
const fileName = context.getFilename();
if (node.specifiers) {
node.specifiers.map((item) => {
if (
item.local.name === 'knex' &&
fileName.includes('unit.spec')
) {
return context.report(
node,
item.loc,
`Do not use ${item.local.name} in unit test file ${fileName}`,
);
}
return null;
});
}
},
};
},
},
},
};
View post:
ESLint custom rules are useful
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