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72 lines
2.3 KiB
72 lines
2.3 KiB
'use strict';
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const find = require('ramda/src/find');
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const createAstUtils = require('../util/ast');
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module.exports = {
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meta: {
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type: 'problem',
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docs: {
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description: 'Enforces handling of callbacks for async tests'
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},
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schema: [
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{
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type: 'object',
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properties: {
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ignoreSkipped: {
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type: 'boolean',
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default: false
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}
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},
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additionalProperties: false
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}
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]
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},
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create(context) {
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const astUtils = createAstUtils(context.settings);
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const [ { ignoreSkipped = false } = {} ] = context.options;
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const modifiersToCheck = ignoreSkipped ? [ 'only' ] : [ 'only', 'skip' ];
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function isAsyncFunction(functionExpression) {
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return functionExpression.params.length === 1;
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}
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function findParamInScope(paramName, scope) {
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return find(function (variable) {
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return variable.name === paramName && variable.defs[0].type === 'Parameter';
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}, scope.variables);
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}
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function isReferenceHandled(reference) {
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const parent = context.getNodeByRangeIndex(reference.identifier.range[0]).parent;
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return parent.type === 'CallExpression';
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}
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function hasHandledReferences(references) {
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return references.some(isReferenceHandled);
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}
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function checkAsyncMochaFunction(functionExpression) {
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const scope = context.getScope();
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const callback = functionExpression.params[0];
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const callbackName = callback.name;
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const callbackVariable = findParamInScope(callbackName, scope);
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if (callbackVariable && !hasHandledReferences(callbackVariable.references)) {
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context.report(callback, 'Expected "{{name}}" callback to be handled.', { name: callbackName });
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}
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}
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function check(node) {
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if (astUtils.hasParentMochaFunctionCall(node, { modifiers: modifiersToCheck }) && isAsyncFunction(node)) {
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checkAsyncMochaFunction(node);
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}
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}
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return {
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FunctionExpression: check,
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ArrowFunctionExpression: check
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};
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}
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};
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