/
unbound-method.ts
96 lines (81 loc) · 2.23 KB
/
unbound-method.ts
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import { AST_NODE_TYPES, TSESLint, TSESTree } from '@typescript-eslint/utils';
import {
createRule,
findTopMostCallExpression,
getAccessorValue,
parseJestFnCall,
} from './utils';
const toThrowMatchers = [
'toThrow',
'toThrowError',
'toThrowErrorMatchingSnapshot',
'toThrowErrorMatchingInlineSnapshot',
];
const baseRule = (() => {
try {
// eslint-disable-next-line @typescript-eslint/no-require-imports
const TSESLintPlugin = require('@typescript-eslint/eslint-plugin');
return TSESLintPlugin.rules['unbound-method'] as TSESLint.RuleModule<
MessageIds,
Options
>;
} catch (e: unknown) {
const error = e as { code: string };
if (error.code === 'MODULE_NOT_FOUND') {
return null;
}
throw error;
}
})();
interface Config {
ignoreStatic: boolean;
}
export type Options = [Config];
export type MessageIds = 'unbound' | 'unboundWithoutThisAnnotation';
const DEFAULT_MESSAGE = 'This rule requires `@typescript-eslint/eslint-plugin`';
export default createRule<Options, MessageIds>({
defaultOptions: [{ ignoreStatic: false }],
...baseRule,
name: __filename,
meta: {
messages: {
unbound: DEFAULT_MESSAGE,
unboundWithoutThisAnnotation: DEFAULT_MESSAGE,
},
schema: [],
type: 'problem',
...baseRule?.meta,
docs: {
category: 'Best Practices',
description:
'Enforce unbound methods are called with their expected scope',
requiresTypeChecking: true,
...baseRule?.meta.docs,
recommended: false,
},
},
create(context) {
const baseSelectors = baseRule?.create(context);
if (!baseSelectors) {
return {};
}
return {
...baseSelectors,
MemberExpression(node: TSESTree.MemberExpression): void {
if (node.parent?.type === AST_NODE_TYPES.CallExpression) {
const jestFnCall = parseJestFnCall(
findTopMostCallExpression(node.parent),
context,
);
if (jestFnCall?.type === 'expect') {
const { matcher } = jestFnCall;
if (!toThrowMatchers.includes(getAccessorValue(matcher))) {
return;
}
}
}
baseSelectors.MemberExpression?.(node);
},
};
},
});