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1206 lines
47 KiB
1206 lines
47 KiB
/**
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* @fileoverview Mocha test wrapper
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* @author Ilya Volodin
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*/
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"use strict";
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/* globals describe, it -- Mocha globals */
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/*
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* This is a wrapper around mocha to allow for DRY unittests for eslint
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* Format:
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* RuleTester.run("{ruleName}", {
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* valid: [
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* "{code}",
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* { code: "{code}", options: {options}, globals: {globals}, parser: "{parser}", settings: {settings} }
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* ],
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* invalid: [
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* { code: "{code}", errors: {numErrors} },
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* { code: "{code}", errors: ["{errorMessage}"] },
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* { code: "{code}", options: {options}, globals: {globals}, parser: "{parser}", settings: {settings}, errors: [{ message: "{errorMessage}", type: "{errorNodeType}"}] }
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* ]
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* });
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*
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* Variables:
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* {code} - String that represents the code to be tested
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* {options} - Arguments that are passed to the configurable rules.
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* {globals} - An object representing a list of variables that are
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* registered as globals
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* {parser} - String representing the parser to use
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* {settings} - An object representing global settings for all rules
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* {numErrors} - If failing case doesn't need to check error message,
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* this integer will specify how many errors should be
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* received
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* {errorMessage} - Message that is returned by the rule on failure
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* {errorNodeType} - AST node type that is returned by they rule as
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* a cause of the failure.
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*/
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const
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assert = require("assert"),
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path = require("path"),
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util = require("util"),
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merge = require("lodash.merge"),
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equal = require("fast-deep-equal"),
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Traverser = require("../../lib/shared/traverser"),
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{ getRuleOptionsSchema, validate } = require("../shared/config-validator"),
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{ Linter, SourceCodeFixer, interpolate } = require("../linter"),
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CodePath = require("../linter/code-path-analysis/code-path");
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const ajv = require("../shared/ajv")({ strictDefaults: true });
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const espreePath = require.resolve("espree");
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const parserSymbol = Symbol.for("eslint.RuleTester.parser");
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const { SourceCode } = require("../source-code");
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//------------------------------------------------------------------------------
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// Typedefs
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//------------------------------------------------------------------------------
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/** @typedef {import("../shared/types").Parser} Parser */
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/** @typedef {import("../shared/types").Rule} Rule */
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/**
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* A test case that is expected to pass lint.
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* @typedef {Object} ValidTestCase
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* @property {string} [name] Name for the test case.
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* @property {string} code Code for the test case.
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* @property {any[]} [options] Options for the test case.
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* @property {{ [name: string]: any }} [settings] Settings for the test case.
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* @property {string} [filename] The fake filename for the test case. Useful for rules that make assertion about filenames.
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* @property {string} [parser] The absolute path for the parser.
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* @property {{ [name: string]: any }} [parserOptions] Options for the parser.
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* @property {{ [name: string]: "readonly" | "writable" | "off" }} [globals] The additional global variables.
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* @property {{ [name: string]: boolean }} [env] Environments for the test case.
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* @property {boolean} [only] Run only this test case or the subset of test cases with this property.
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*/
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/**
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* A test case that is expected to fail lint.
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* @typedef {Object} InvalidTestCase
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* @property {string} [name] Name for the test case.
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* @property {string} code Code for the test case.
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* @property {number | Array<TestCaseError | string | RegExp>} errors Expected errors.
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* @property {string | null} [output] The expected code after autofixes are applied. If set to `null`, the test runner will assert that no autofix is suggested.
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* @property {any[]} [options] Options for the test case.
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* @property {{ [name: string]: any }} [settings] Settings for the test case.
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* @property {string} [filename] The fake filename for the test case. Useful for rules that make assertion about filenames.
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* @property {string} [parser] The absolute path for the parser.
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* @property {{ [name: string]: any }} [parserOptions] Options for the parser.
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* @property {{ [name: string]: "readonly" | "writable" | "off" }} [globals] The additional global variables.
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* @property {{ [name: string]: boolean }} [env] Environments for the test case.
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* @property {boolean} [only] Run only this test case or the subset of test cases with this property.
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*/
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/**
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* A description of a reported error used in a rule tester test.
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* @typedef {Object} TestCaseError
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* @property {string | RegExp} [message] Message.
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* @property {string} [messageId] Message ID.
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* @property {string} [type] The type of the reported AST node.
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* @property {{ [name: string]: string }} [data] The data used to fill the message template.
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* @property {number} [line] The 1-based line number of the reported start location.
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* @property {number} [column] The 1-based column number of the reported start location.
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* @property {number} [endLine] The 1-based line number of the reported end location.
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* @property {number} [endColumn] The 1-based column number of the reported end location.
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*/
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//------------------------------------------------------------------------------
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// Private Members
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//------------------------------------------------------------------------------
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/*
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* testerDefaultConfig must not be modified as it allows to reset the tester to
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* the initial default configuration
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*/
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const testerDefaultConfig = { rules: {} };
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let defaultConfig = { rules: {} };
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/*
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* List every parameters possible on a test case that are not related to eslint
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* configuration
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*/
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const RuleTesterParameters = [
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"name",
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"code",
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"filename",
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"options",
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"errors",
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"output",
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"only"
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];
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/*
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* All allowed property names in error objects.
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*/
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const errorObjectParameters = new Set([
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"message",
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"messageId",
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"data",
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"type",
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"line",
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"column",
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"endLine",
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"endColumn",
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"suggestions"
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]);
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const friendlyErrorObjectParameterList = `[${[...errorObjectParameters].map(key => `'${key}'`).join(", ")}]`;
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/*
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* All allowed property names in suggestion objects.
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*/
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const suggestionObjectParameters = new Set([
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"desc",
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"messageId",
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"data",
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"output"
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]);
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const friendlySuggestionObjectParameterList = `[${[...suggestionObjectParameters].map(key => `'${key}'`).join(", ")}]`;
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const forbiddenMethods = [
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"applyInlineConfig",
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"applyLanguageOptions",
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"finalize"
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];
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const hasOwnProperty = Function.call.bind(Object.hasOwnProperty);
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const DEPRECATED_SOURCECODE_PASSTHROUGHS = {
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getSource: "getText",
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getSourceLines: "getLines",
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getAllComments: "getAllComments",
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getNodeByRangeIndex: "getNodeByRangeIndex",
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// getComments: "getComments", -- already handled by a separate error
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getCommentsBefore: "getCommentsBefore",
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getCommentsAfter: "getCommentsAfter",
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getCommentsInside: "getCommentsInside",
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getJSDocComment: "getJSDocComment",
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getFirstToken: "getFirstToken",
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getFirstTokens: "getFirstTokens",
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getLastToken: "getLastToken",
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getLastTokens: "getLastTokens",
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getTokenAfter: "getTokenAfter",
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getTokenBefore: "getTokenBefore",
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getTokenByRangeStart: "getTokenByRangeStart",
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getTokens: "getTokens",
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getTokensAfter: "getTokensAfter",
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getTokensBefore: "getTokensBefore",
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getTokensBetween: "getTokensBetween",
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getScope: "getScope",
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getAncestors: "getAncestors",
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getDeclaredVariables: "getDeclaredVariables",
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markVariableAsUsed: "markVariableAsUsed"
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};
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/**
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* Clones a given value deeply.
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* Note: This ignores `parent` property.
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* @param {any} x A value to clone.
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* @returns {any} A cloned value.
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*/
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function cloneDeeplyExcludesParent(x) {
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if (typeof x === "object" && x !== null) {
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if (Array.isArray(x)) {
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return x.map(cloneDeeplyExcludesParent);
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}
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const retv = {};
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for (const key in x) {
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if (key !== "parent" && hasOwnProperty(x, key)) {
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retv[key] = cloneDeeplyExcludesParent(x[key]);
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}
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}
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return retv;
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}
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return x;
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}
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/**
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* Freezes a given value deeply.
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* @param {any} x A value to freeze.
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* @returns {void}
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*/
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function freezeDeeply(x) {
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if (typeof x === "object" && x !== null) {
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if (Array.isArray(x)) {
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x.forEach(freezeDeeply);
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} else {
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for (const key in x) {
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if (key !== "parent" && hasOwnProperty(x, key)) {
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freezeDeeply(x[key]);
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}
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}
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}
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Object.freeze(x);
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}
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}
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/**
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* Replace control characters by `\u00xx` form.
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* @param {string} text The text to sanitize.
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* @returns {string} The sanitized text.
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*/
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function sanitize(text) {
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if (typeof text !== "string") {
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return "";
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}
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return text.replace(
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/[\u0000-\u0009\u000b-\u001a]/gu, // eslint-disable-line no-control-regex -- Escaping controls
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c => `\\u${c.codePointAt(0).toString(16).padStart(4, "0")}`
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);
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}
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/**
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* Define `start`/`end` properties as throwing error.
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* @param {string} objName Object name used for error messages.
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* @param {ASTNode} node The node to define.
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* @returns {void}
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*/
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function defineStartEndAsError(objName, node) {
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Object.defineProperties(node, {
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start: {
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get() {
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throw new Error(`Use ${objName}.range[0] instead of ${objName}.start`);
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},
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configurable: true,
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enumerable: false
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},
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end: {
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get() {
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throw new Error(`Use ${objName}.range[1] instead of ${objName}.end`);
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},
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configurable: true,
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enumerable: false
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}
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});
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}
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/**
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* Define `start`/`end` properties of all nodes of the given AST as throwing error.
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* @param {ASTNode} ast The root node to errorize `start`/`end` properties.
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* @param {Object} [visitorKeys] Visitor keys to be used for traversing the given ast.
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* @returns {void}
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*/
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function defineStartEndAsErrorInTree(ast, visitorKeys) {
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Traverser.traverse(ast, { visitorKeys, enter: defineStartEndAsError.bind(null, "node") });
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ast.tokens.forEach(defineStartEndAsError.bind(null, "token"));
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ast.comments.forEach(defineStartEndAsError.bind(null, "token"));
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}
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/**
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* Wraps the given parser in order to intercept and modify return values from the `parse` and `parseForESLint` methods, for test purposes.
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* In particular, to modify ast nodes, tokens and comments to throw on access to their `start` and `end` properties.
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* @param {Parser} parser Parser object.
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* @returns {Parser} Wrapped parser object.
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*/
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function wrapParser(parser) {
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if (typeof parser.parseForESLint === "function") {
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return {
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[parserSymbol]: parser,
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parseForESLint(...args) {
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const ret = parser.parseForESLint(...args);
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defineStartEndAsErrorInTree(ret.ast, ret.visitorKeys);
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return ret;
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}
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};
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}
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return {
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[parserSymbol]: parser,
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parse(...args) {
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const ast = parser.parse(...args);
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defineStartEndAsErrorInTree(ast);
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return ast;
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}
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};
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}
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/**
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* Function to replace `SourceCode.prototype.getComments`.
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* @returns {void}
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* @throws {Error} Deprecation message.
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*/
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function getCommentsDeprecation() {
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throw new Error(
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"`SourceCode#getComments()` is deprecated and will be removed in a future major version. Use `getCommentsBefore()`, `getCommentsAfter()`, and `getCommentsInside()` instead."
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);
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}
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/**
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* Function to replace forbidden `SourceCode` methods.
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* @param {string} methodName The name of the method to forbid.
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* @returns {Function} The function that throws the error.
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*/
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function throwForbiddenMethodError(methodName) {
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return () => {
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throw new Error(
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`\`SourceCode#${methodName}()\` cannot be called inside a rule.`
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);
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};
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}
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/**
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* Emit a deprecation warning if function-style format is being used.
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* @param {string} ruleName Name of the rule.
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* @returns {void}
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*/
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function emitLegacyRuleAPIWarning(ruleName) {
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if (!emitLegacyRuleAPIWarning[`warned-${ruleName}`]) {
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emitLegacyRuleAPIWarning[`warned-${ruleName}`] = true;
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process.emitWarning(
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`"${ruleName}" rule is using the deprecated function-style format and will stop working in ESLint v9. Please use object-style format: https://eslint.org/docs/latest/extend/custom-rules`,
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"DeprecationWarning"
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);
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}
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}
|
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|
|
/**
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* Emit a deprecation warning if rule has options but is missing the "meta.schema" property
|
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* @param {string} ruleName Name of the rule.
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* @returns {void}
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*/
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function emitMissingSchemaWarning(ruleName) {
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if (!emitMissingSchemaWarning[`warned-${ruleName}`]) {
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emitMissingSchemaWarning[`warned-${ruleName}`] = true;
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process.emitWarning(
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`"${ruleName}" rule has options but is missing the "meta.schema" property and will stop working in ESLint v9. Please add a schema: https://eslint.org/docs/latest/extend/custom-rules#options-schemas`,
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"DeprecationWarning"
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);
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}
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}
|
|
|
|
/**
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|
* Emit a deprecation warning if a rule uses a deprecated `context` method.
|
|
* @param {string} ruleName Name of the rule.
|
|
* @param {string} methodName The name of the method on `context` that was used.
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* @returns {void}
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*/
|
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function emitDeprecatedContextMethodWarning(ruleName, methodName) {
|
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if (!emitDeprecatedContextMethodWarning[`warned-${ruleName}-${methodName}`]) {
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emitDeprecatedContextMethodWarning[`warned-${ruleName}-${methodName}`] = true;
|
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process.emitWarning(
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`"${ruleName}" rule is using \`context.${methodName}()\`, which is deprecated and will be removed in ESLint v9. Please use \`sourceCode.${DEPRECATED_SOURCECODE_PASSTHROUGHS[methodName]}()\` instead.`,
|
|
"DeprecationWarning"
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Emit a deprecation warning if rule uses CodePath#currentSegments.
|
|
* @param {string} ruleName Name of the rule.
|
|
* @returns {void}
|
|
*/
|
|
function emitCodePathCurrentSegmentsWarning(ruleName) {
|
|
if (!emitCodePathCurrentSegmentsWarning[`warned-${ruleName}`]) {
|
|
emitCodePathCurrentSegmentsWarning[`warned-${ruleName}`] = true;
|
|
process.emitWarning(
|
|
`"${ruleName}" rule uses CodePath#currentSegments and will stop working in ESLint v9. Please read the documentation for how to update your code: https://eslint.org/docs/latest/extend/code-path-analysis#usage-examples`,
|
|
"DeprecationWarning"
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Emit a deprecation warning if `context.parserServices` is used.
|
|
* @param {string} ruleName Name of the rule.
|
|
* @returns {void}
|
|
*/
|
|
function emitParserServicesWarning(ruleName) {
|
|
if (!emitParserServicesWarning[`warned-${ruleName}`]) {
|
|
emitParserServicesWarning[`warned-${ruleName}`] = true;
|
|
process.emitWarning(
|
|
`"${ruleName}" rule is using \`context.parserServices\`, which is deprecated and will be removed in ESLint v9. Please use \`sourceCode.parserServices\` instead.`,
|
|
"DeprecationWarning"
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Public Interface
|
|
//------------------------------------------------------------------------------
|
|
|
|
// default separators for testing
|
|
const DESCRIBE = Symbol("describe");
|
|
const IT = Symbol("it");
|
|
const IT_ONLY = Symbol("itOnly");
|
|
|
|
/**
|
|
* This is `it` default handler if `it` don't exist.
|
|
* @this {Mocha}
|
|
* @param {string} text The description of the test case.
|
|
* @param {Function} method The logic of the test case.
|
|
* @throws {Error} Any error upon execution of `method`.
|
|
* @returns {any} Returned value of `method`.
|
|
*/
|
|
function itDefaultHandler(text, method) {
|
|
try {
|
|
return method.call(this);
|
|
} catch (err) {
|
|
if (err instanceof assert.AssertionError) {
|
|
err.message += ` (${util.inspect(err.actual)} ${err.operator} ${util.inspect(err.expected)})`;
|
|
}
|
|
throw err;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is `describe` default handler if `describe` don't exist.
|
|
* @this {Mocha}
|
|
* @param {string} text The description of the test case.
|
|
* @param {Function} method The logic of the test case.
|
|
* @returns {any} Returned value of `method`.
|
|
*/
|
|
function describeDefaultHandler(text, method) {
|
|
return method.call(this);
|
|
}
|
|
|
|
/**
|
|
* Mocha test wrapper.
|
|
*/
|
|
class RuleTester {
|
|
|
|
/**
|
|
* Creates a new instance of RuleTester.
|
|
* @param {Object} [testerConfig] Optional, extra configuration for the tester
|
|
*/
|
|
constructor(testerConfig) {
|
|
|
|
/**
|
|
* The configuration to use for this tester. Combination of the tester
|
|
* configuration and the default configuration.
|
|
* @type {Object}
|
|
*/
|
|
this.testerConfig = merge(
|
|
{},
|
|
defaultConfig,
|
|
testerConfig,
|
|
{ rules: { "rule-tester/validate-ast": "error" } }
|
|
);
|
|
|
|
/**
|
|
* Rule definitions to define before tests.
|
|
* @type {Object}
|
|
*/
|
|
this.rules = {};
|
|
this.linter = new Linter();
|
|
}
|
|
|
|
/**
|
|
* Set the configuration to use for all future tests
|
|
* @param {Object} config the configuration to use.
|
|
* @throws {TypeError} If non-object config.
|
|
* @returns {void}
|
|
*/
|
|
static setDefaultConfig(config) {
|
|
if (typeof config !== "object" || config === null) {
|
|
throw new TypeError("RuleTester.setDefaultConfig: config must be an object");
|
|
}
|
|
defaultConfig = config;
|
|
|
|
// Make sure the rules object exists since it is assumed to exist later
|
|
defaultConfig.rules = defaultConfig.rules || {};
|
|
}
|
|
|
|
/**
|
|
* Get the current configuration used for all tests
|
|
* @returns {Object} the current configuration
|
|
*/
|
|
static getDefaultConfig() {
|
|
return defaultConfig;
|
|
}
|
|
|
|
/**
|
|
* Reset the configuration to the initial configuration of the tester removing
|
|
* any changes made until now.
|
|
* @returns {void}
|
|
*/
|
|
static resetDefaultConfig() {
|
|
defaultConfig = merge({}, testerDefaultConfig);
|
|
}
|
|
|
|
|
|
/*
|
|
* If people use `mocha test.js --watch` command, `describe` and `it` function
|
|
* instances are different for each execution. So `describe` and `it` should get fresh instance
|
|
* always.
|
|
*/
|
|
static get describe() {
|
|
return (
|
|
this[DESCRIBE] ||
|
|
(typeof describe === "function" ? describe : describeDefaultHandler)
|
|
);
|
|
}
|
|
|
|
static set describe(value) {
|
|
this[DESCRIBE] = value;
|
|
}
|
|
|
|
static get it() {
|
|
return (
|
|
this[IT] ||
|
|
(typeof it === "function" ? it : itDefaultHandler)
|
|
);
|
|
}
|
|
|
|
static set it(value) {
|
|
this[IT] = value;
|
|
}
|
|
|
|
/**
|
|
* Adds the `only` property to a test to run it in isolation.
|
|
* @param {string | ValidTestCase | InvalidTestCase} item A single test to run by itself.
|
|
* @returns {ValidTestCase | InvalidTestCase} The test with `only` set.
|
|
*/
|
|
static only(item) {
|
|
if (typeof item === "string") {
|
|
return { code: item, only: true };
|
|
}
|
|
|
|
return { ...item, only: true };
|
|
}
|
|
|
|
static get itOnly() {
|
|
if (typeof this[IT_ONLY] === "function") {
|
|
return this[IT_ONLY];
|
|
}
|
|
if (typeof this[IT] === "function" && typeof this[IT].only === "function") {
|
|
return Function.bind.call(this[IT].only, this[IT]);
|
|
}
|
|
if (typeof it === "function" && typeof it.only === "function") {
|
|
return Function.bind.call(it.only, it);
|
|
}
|
|
|
|
if (typeof this[DESCRIBE] === "function" || typeof this[IT] === "function") {
|
|
throw new Error(
|
|
"Set `RuleTester.itOnly` to use `only` with a custom test framework.\n" +
|
|
"See https://eslint.org/docs/latest/integrate/nodejs-api#customizing-ruletester for more."
|
|
);
|
|
}
|
|
if (typeof it === "function") {
|
|
throw new Error("The current test framework does not support exclusive tests with `only`.");
|
|
}
|
|
throw new Error("To use `only`, use RuleTester with a test framework that provides `it.only()` like Mocha.");
|
|
}
|
|
|
|
static set itOnly(value) {
|
|
this[IT_ONLY] = value;
|
|
}
|
|
|
|
/**
|
|
* Define a rule for one particular run of tests.
|
|
* @param {string} name The name of the rule to define.
|
|
* @param {Function | Rule} rule The rule definition.
|
|
* @returns {void}
|
|
*/
|
|
defineRule(name, rule) {
|
|
if (typeof rule === "function") {
|
|
emitLegacyRuleAPIWarning(name);
|
|
}
|
|
this.rules[name] = rule;
|
|
}
|
|
|
|
/**
|
|
* Adds a new rule test to execute.
|
|
* @param {string} ruleName The name of the rule to run.
|
|
* @param {Function | Rule} rule The rule to test.
|
|
* @param {{
|
|
* valid: (ValidTestCase | string)[],
|
|
* invalid: InvalidTestCase[]
|
|
* }} test The collection of tests to run.
|
|
* @throws {TypeError|Error} If non-object `test`, or if a required
|
|
* scenario of the given type is missing.
|
|
* @returns {void}
|
|
*/
|
|
run(ruleName, rule, test) {
|
|
|
|
const testerConfig = this.testerConfig,
|
|
requiredScenarios = ["valid", "invalid"],
|
|
scenarioErrors = [],
|
|
linter = this.linter;
|
|
|
|
if (!test || typeof test !== "object") {
|
|
throw new TypeError(`Test Scenarios for rule ${ruleName} : Could not find test scenario object`);
|
|
}
|
|
|
|
requiredScenarios.forEach(scenarioType => {
|
|
if (!test[scenarioType]) {
|
|
scenarioErrors.push(`Could not find any ${scenarioType} test scenarios`);
|
|
}
|
|
});
|
|
|
|
if (scenarioErrors.length > 0) {
|
|
throw new Error([
|
|
`Test Scenarios for rule ${ruleName} is invalid:`
|
|
].concat(scenarioErrors).join("\n"));
|
|
}
|
|
|
|
if (typeof rule === "function") {
|
|
emitLegacyRuleAPIWarning(ruleName);
|
|
}
|
|
|
|
linter.defineRule(ruleName, Object.assign({}, rule, {
|
|
|
|
// Create a wrapper rule that freezes the `context` properties.
|
|
create(context) {
|
|
freezeDeeply(context.options);
|
|
freezeDeeply(context.settings);
|
|
freezeDeeply(context.parserOptions);
|
|
|
|
// wrap all deprecated methods
|
|
const newContext = Object.create(
|
|
context,
|
|
Object.fromEntries(Object.keys(DEPRECATED_SOURCECODE_PASSTHROUGHS).map(methodName => [
|
|
methodName,
|
|
{
|
|
value(...args) {
|
|
|
|
// emit deprecation warning
|
|
emitDeprecatedContextMethodWarning(ruleName, methodName);
|
|
|
|
// call the original method
|
|
return context[methodName].call(this, ...args);
|
|
},
|
|
enumerable: true
|
|
}
|
|
]))
|
|
);
|
|
|
|
// emit warning about context.parserServices
|
|
const parserServices = context.parserServices;
|
|
|
|
Object.defineProperty(newContext, "parserServices", {
|
|
get() {
|
|
emitParserServicesWarning(ruleName);
|
|
return parserServices;
|
|
}
|
|
});
|
|
|
|
Object.freeze(newContext);
|
|
|
|
return (typeof rule === "function" ? rule : rule.create)(newContext);
|
|
}
|
|
}));
|
|
|
|
linter.defineRules(this.rules);
|
|
|
|
/**
|
|
* Run the rule for the given item
|
|
* @param {string|Object} item Item to run the rule against
|
|
* @throws {Error} If an invalid schema.
|
|
* @returns {Object} Eslint run result
|
|
* @private
|
|
*/
|
|
function runRuleForItem(item) {
|
|
let config = merge({}, testerConfig),
|
|
code, filename, output, beforeAST, afterAST;
|
|
|
|
if (typeof item === "string") {
|
|
code = item;
|
|
} else {
|
|
code = item.code;
|
|
|
|
/*
|
|
* Assumes everything on the item is a config except for the
|
|
* parameters used by this tester
|
|
*/
|
|
const itemConfig = { ...item };
|
|
|
|
for (const parameter of RuleTesterParameters) {
|
|
delete itemConfig[parameter];
|
|
}
|
|
|
|
/*
|
|
* Create the config object from the tester config and this item
|
|
* specific configurations.
|
|
*/
|
|
config = merge(
|
|
config,
|
|
itemConfig
|
|
);
|
|
}
|
|
|
|
if (item.filename) {
|
|
filename = item.filename;
|
|
}
|
|
|
|
if (hasOwnProperty(item, "options")) {
|
|
assert(Array.isArray(item.options), "options must be an array");
|
|
if (
|
|
item.options.length > 0 &&
|
|
typeof rule === "object" &&
|
|
(
|
|
!rule.meta || (rule.meta && (typeof rule.meta.schema === "undefined" || rule.meta.schema === null))
|
|
)
|
|
) {
|
|
emitMissingSchemaWarning(ruleName);
|
|
}
|
|
config.rules[ruleName] = [1].concat(item.options);
|
|
} else {
|
|
config.rules[ruleName] = 1;
|
|
}
|
|
|
|
const schema = getRuleOptionsSchema(rule);
|
|
|
|
/*
|
|
* Setup AST getters.
|
|
* The goal is to check whether or not AST was modified when
|
|
* running the rule under test.
|
|
*/
|
|
linter.defineRule("rule-tester/validate-ast", {
|
|
create() {
|
|
return {
|
|
Program(node) {
|
|
beforeAST = cloneDeeplyExcludesParent(node);
|
|
},
|
|
"Program:exit"(node) {
|
|
afterAST = node;
|
|
}
|
|
};
|
|
}
|
|
});
|
|
|
|
if (typeof config.parser === "string") {
|
|
assert(path.isAbsolute(config.parser), "Parsers provided as strings to RuleTester must be absolute paths");
|
|
} else {
|
|
config.parser = espreePath;
|
|
}
|
|
|
|
linter.defineParser(config.parser, wrapParser(require(config.parser)));
|
|
|
|
if (schema) {
|
|
ajv.validateSchema(schema);
|
|
|
|
if (ajv.errors) {
|
|
const errors = ajv.errors.map(error => {
|
|
const field = error.dataPath[0] === "." ? error.dataPath.slice(1) : error.dataPath;
|
|
|
|
return `\t${field}: ${error.message}`;
|
|
}).join("\n");
|
|
|
|
throw new Error([`Schema for rule ${ruleName} is invalid:`, errors]);
|
|
}
|
|
|
|
/*
|
|
* `ajv.validateSchema` checks for errors in the structure of the schema (by comparing the schema against a "meta-schema"),
|
|
* and it reports those errors individually. However, there are other types of schema errors that only occur when compiling
|
|
* the schema (e.g. using invalid defaults in a schema), and only one of these errors can be reported at a time. As a result,
|
|
* the schema is compiled here separately from checking for `validateSchema` errors.
|
|
*/
|
|
try {
|
|
ajv.compile(schema);
|
|
} catch (err) {
|
|
throw new Error(`Schema for rule ${ruleName} is invalid: ${err.message}`);
|
|
}
|
|
}
|
|
|
|
validate(config, "rule-tester", id => (id === ruleName ? rule : null));
|
|
|
|
// Verify the code.
|
|
const { getComments, applyLanguageOptions, applyInlineConfig, finalize } = SourceCode.prototype;
|
|
const originalCurrentSegments = Object.getOwnPropertyDescriptor(CodePath.prototype, "currentSegments");
|
|
let messages;
|
|
|
|
try {
|
|
SourceCode.prototype.getComments = getCommentsDeprecation;
|
|
Object.defineProperty(CodePath.prototype, "currentSegments", {
|
|
get() {
|
|
emitCodePathCurrentSegmentsWarning(ruleName);
|
|
return originalCurrentSegments.get.call(this);
|
|
}
|
|
});
|
|
|
|
forbiddenMethods.forEach(methodName => {
|
|
SourceCode.prototype[methodName] = throwForbiddenMethodError(methodName);
|
|
});
|
|
|
|
messages = linter.verify(code, config, filename);
|
|
} finally {
|
|
SourceCode.prototype.getComments = getComments;
|
|
Object.defineProperty(CodePath.prototype, "currentSegments", originalCurrentSegments);
|
|
SourceCode.prototype.applyInlineConfig = applyInlineConfig;
|
|
SourceCode.prototype.applyLanguageOptions = applyLanguageOptions;
|
|
SourceCode.prototype.finalize = finalize;
|
|
}
|
|
|
|
const fatalErrorMessage = messages.find(m => m.fatal);
|
|
|
|
assert(!fatalErrorMessage, `A fatal parsing error occurred: ${fatalErrorMessage && fatalErrorMessage.message}`);
|
|
|
|
// Verify if autofix makes a syntax error or not.
|
|
if (messages.some(m => m.fix)) {
|
|
output = SourceCodeFixer.applyFixes(code, messages).output;
|
|
const errorMessageInFix = linter.verify(output, config, filename).find(m => m.fatal);
|
|
|
|
assert(!errorMessageInFix, [
|
|
"A fatal parsing error occurred in autofix.",
|
|
`Error: ${errorMessageInFix && errorMessageInFix.message}`,
|
|
"Autofix output:",
|
|
output
|
|
].join("\n"));
|
|
} else {
|
|
output = code;
|
|
}
|
|
|
|
return {
|
|
messages,
|
|
output,
|
|
beforeAST,
|
|
afterAST: cloneDeeplyExcludesParent(afterAST)
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Check if the AST was changed
|
|
* @param {ASTNode} beforeAST AST node before running
|
|
* @param {ASTNode} afterAST AST node after running
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function assertASTDidntChange(beforeAST, afterAST) {
|
|
if (!equal(beforeAST, afterAST)) {
|
|
assert.fail("Rule should not modify AST.");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the template is valid or not
|
|
* all valid cases go through this
|
|
* @param {string|Object} item Item to run the rule against
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function testValidTemplate(item) {
|
|
const code = typeof item === "object" ? item.code : item;
|
|
|
|
assert.ok(typeof code === "string", "Test case must specify a string value for 'code'");
|
|
if (item.name) {
|
|
assert.ok(typeof item.name === "string", "Optional test case property 'name' must be a string");
|
|
}
|
|
|
|
const result = runRuleForItem(item);
|
|
const messages = result.messages;
|
|
|
|
assert.strictEqual(messages.length, 0, util.format("Should have no errors but had %d: %s",
|
|
messages.length,
|
|
util.inspect(messages)));
|
|
|
|
assertASTDidntChange(result.beforeAST, result.afterAST);
|
|
}
|
|
|
|
/**
|
|
* Asserts that the message matches its expected value. If the expected
|
|
* value is a regular expression, it is checked against the actual
|
|
* value.
|
|
* @param {string} actual Actual value
|
|
* @param {string|RegExp} expected Expected value
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function assertMessageMatches(actual, expected) {
|
|
if (expected instanceof RegExp) {
|
|
|
|
// assert.js doesn't have a built-in RegExp match function
|
|
assert.ok(
|
|
expected.test(actual),
|
|
`Expected '${actual}' to match ${expected}`
|
|
);
|
|
} else {
|
|
assert.strictEqual(actual, expected);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the template is invalid or not
|
|
* all invalid cases go through this.
|
|
* @param {string|Object} item Item to run the rule against
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function testInvalidTemplate(item) {
|
|
assert.ok(typeof item.code === "string", "Test case must specify a string value for 'code'");
|
|
if (item.name) {
|
|
assert.ok(typeof item.name === "string", "Optional test case property 'name' must be a string");
|
|
}
|
|
assert.ok(item.errors || item.errors === 0,
|
|
`Did not specify errors for an invalid test of ${ruleName}`);
|
|
|
|
if (Array.isArray(item.errors) && item.errors.length === 0) {
|
|
assert.fail("Invalid cases must have at least one error");
|
|
}
|
|
|
|
const ruleHasMetaMessages = hasOwnProperty(rule, "meta") && hasOwnProperty(rule.meta, "messages");
|
|
const friendlyIDList = ruleHasMetaMessages ? `[${Object.keys(rule.meta.messages).map(key => `'${key}'`).join(", ")}]` : null;
|
|
|
|
const result = runRuleForItem(item);
|
|
const messages = result.messages;
|
|
|
|
if (typeof item.errors === "number") {
|
|
|
|
if (item.errors === 0) {
|
|
assert.fail("Invalid cases must have 'error' value greater than 0");
|
|
}
|
|
|
|
assert.strictEqual(messages.length, item.errors, util.format("Should have %d error%s but had %d: %s",
|
|
item.errors,
|
|
item.errors === 1 ? "" : "s",
|
|
messages.length,
|
|
util.inspect(messages)));
|
|
} else {
|
|
assert.strictEqual(
|
|
messages.length, item.errors.length, util.format(
|
|
"Should have %d error%s but had %d: %s",
|
|
item.errors.length,
|
|
item.errors.length === 1 ? "" : "s",
|
|
messages.length,
|
|
util.inspect(messages)
|
|
)
|
|
);
|
|
|
|
const hasMessageOfThisRule = messages.some(m => m.ruleId === ruleName);
|
|
|
|
for (let i = 0, l = item.errors.length; i < l; i++) {
|
|
const error = item.errors[i];
|
|
const message = messages[i];
|
|
|
|
assert(hasMessageOfThisRule, "Error rule name should be the same as the name of the rule being tested");
|
|
|
|
if (typeof error === "string" || error instanceof RegExp) {
|
|
|
|
// Just an error message.
|
|
assertMessageMatches(message.message, error);
|
|
} else if (typeof error === "object" && error !== null) {
|
|
|
|
/*
|
|
* Error object.
|
|
* This may have a message, messageId, data, node type, line, and/or
|
|
* column.
|
|
*/
|
|
|
|
Object.keys(error).forEach(propertyName => {
|
|
assert.ok(
|
|
errorObjectParameters.has(propertyName),
|
|
`Invalid error property name '${propertyName}'. Expected one of ${friendlyErrorObjectParameterList}.`
|
|
);
|
|
});
|
|
|
|
if (hasOwnProperty(error, "message")) {
|
|
assert.ok(!hasOwnProperty(error, "messageId"), "Error should not specify both 'message' and a 'messageId'.");
|
|
assert.ok(!hasOwnProperty(error, "data"), "Error should not specify both 'data' and 'message'.");
|
|
assertMessageMatches(message.message, error.message);
|
|
} else if (hasOwnProperty(error, "messageId")) {
|
|
assert.ok(
|
|
ruleHasMetaMessages,
|
|
"Error can not use 'messageId' if rule under test doesn't define 'meta.messages'."
|
|
);
|
|
if (!hasOwnProperty(rule.meta.messages, error.messageId)) {
|
|
assert(false, `Invalid messageId '${error.messageId}'. Expected one of ${friendlyIDList}.`);
|
|
}
|
|
assert.strictEqual(
|
|
message.messageId,
|
|
error.messageId,
|
|
`messageId '${message.messageId}' does not match expected messageId '${error.messageId}'.`
|
|
);
|
|
if (hasOwnProperty(error, "data")) {
|
|
|
|
/*
|
|
* if data was provided, then directly compare the returned message to a synthetic
|
|
* interpolated message using the same message ID and data provided in the test.
|
|
* See https://github.com/eslint/eslint/issues/9890 for context.
|
|
*/
|
|
const unformattedOriginalMessage = rule.meta.messages[error.messageId];
|
|
const rehydratedMessage = interpolate(unformattedOriginalMessage, error.data);
|
|
|
|
assert.strictEqual(
|
|
message.message,
|
|
rehydratedMessage,
|
|
`Hydrated message "${rehydratedMessage}" does not match "${message.message}"`
|
|
);
|
|
}
|
|
}
|
|
|
|
assert.ok(
|
|
hasOwnProperty(error, "data") ? hasOwnProperty(error, "messageId") : true,
|
|
"Error must specify 'messageId' if 'data' is used."
|
|
);
|
|
|
|
if (error.type) {
|
|
assert.strictEqual(message.nodeType, error.type, `Error type should be ${error.type}, found ${message.nodeType}`);
|
|
}
|
|
|
|
if (hasOwnProperty(error, "line")) {
|
|
assert.strictEqual(message.line, error.line, `Error line should be ${error.line}`);
|
|
}
|
|
|
|
if (hasOwnProperty(error, "column")) {
|
|
assert.strictEqual(message.column, error.column, `Error column should be ${error.column}`);
|
|
}
|
|
|
|
if (hasOwnProperty(error, "endLine")) {
|
|
assert.strictEqual(message.endLine, error.endLine, `Error endLine should be ${error.endLine}`);
|
|
}
|
|
|
|
if (hasOwnProperty(error, "endColumn")) {
|
|
assert.strictEqual(message.endColumn, error.endColumn, `Error endColumn should be ${error.endColumn}`);
|
|
}
|
|
|
|
if (hasOwnProperty(error, "suggestions")) {
|
|
|
|
// Support asserting there are no suggestions
|
|
if (!error.suggestions || (Array.isArray(error.suggestions) && error.suggestions.length === 0)) {
|
|
if (Array.isArray(message.suggestions) && message.suggestions.length > 0) {
|
|
assert.fail(`Error should have no suggestions on error with message: "${message.message}"`);
|
|
}
|
|
} else {
|
|
assert.strictEqual(Array.isArray(message.suggestions), true, `Error should have an array of suggestions. Instead received "${message.suggestions}" on error with message: "${message.message}"`);
|
|
assert.strictEqual(message.suggestions.length, error.suggestions.length, `Error should have ${error.suggestions.length} suggestions. Instead found ${message.suggestions.length} suggestions`);
|
|
|
|
error.suggestions.forEach((expectedSuggestion, index) => {
|
|
assert.ok(
|
|
typeof expectedSuggestion === "object" && expectedSuggestion !== null,
|
|
"Test suggestion in 'suggestions' array must be an object."
|
|
);
|
|
Object.keys(expectedSuggestion).forEach(propertyName => {
|
|
assert.ok(
|
|
suggestionObjectParameters.has(propertyName),
|
|
`Invalid suggestion property name '${propertyName}'. Expected one of ${friendlySuggestionObjectParameterList}.`
|
|
);
|
|
});
|
|
|
|
const actualSuggestion = message.suggestions[index];
|
|
const suggestionPrefix = `Error Suggestion at index ${index} :`;
|
|
|
|
if (hasOwnProperty(expectedSuggestion, "desc")) {
|
|
assert.ok(
|
|
!hasOwnProperty(expectedSuggestion, "data"),
|
|
`${suggestionPrefix} Test should not specify both 'desc' and 'data'.`
|
|
);
|
|
assert.strictEqual(
|
|
actualSuggestion.desc,
|
|
expectedSuggestion.desc,
|
|
`${suggestionPrefix} desc should be "${expectedSuggestion.desc}" but got "${actualSuggestion.desc}" instead.`
|
|
);
|
|
}
|
|
|
|
if (hasOwnProperty(expectedSuggestion, "messageId")) {
|
|
assert.ok(
|
|
ruleHasMetaMessages,
|
|
`${suggestionPrefix} Test can not use 'messageId' if rule under test doesn't define 'meta.messages'.`
|
|
);
|
|
assert.ok(
|
|
hasOwnProperty(rule.meta.messages, expectedSuggestion.messageId),
|
|
`${suggestionPrefix} Test has invalid messageId '${expectedSuggestion.messageId}', the rule under test allows only one of ${friendlyIDList}.`
|
|
);
|
|
assert.strictEqual(
|
|
actualSuggestion.messageId,
|
|
expectedSuggestion.messageId,
|
|
`${suggestionPrefix} messageId should be '${expectedSuggestion.messageId}' but got '${actualSuggestion.messageId}' instead.`
|
|
);
|
|
if (hasOwnProperty(expectedSuggestion, "data")) {
|
|
const unformattedMetaMessage = rule.meta.messages[expectedSuggestion.messageId];
|
|
const rehydratedDesc = interpolate(unformattedMetaMessage, expectedSuggestion.data);
|
|
|
|
assert.strictEqual(
|
|
actualSuggestion.desc,
|
|
rehydratedDesc,
|
|
`${suggestionPrefix} Hydrated test desc "${rehydratedDesc}" does not match received desc "${actualSuggestion.desc}".`
|
|
);
|
|
}
|
|
} else {
|
|
assert.ok(
|
|
!hasOwnProperty(expectedSuggestion, "data"),
|
|
`${suggestionPrefix} Test must specify 'messageId' if 'data' is used.`
|
|
);
|
|
}
|
|
|
|
if (hasOwnProperty(expectedSuggestion, "output")) {
|
|
const codeWithAppliedSuggestion = SourceCodeFixer.applyFixes(item.code, [actualSuggestion]).output;
|
|
|
|
assert.strictEqual(codeWithAppliedSuggestion, expectedSuggestion.output, `Expected the applied suggestion fix to match the test suggestion output for suggestion at index: ${index} on error with message: "${message.message}"`);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
} else {
|
|
|
|
// Message was an unexpected type
|
|
assert.fail(`Error should be a string, object, or RegExp, but found (${util.inspect(message)})`);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hasOwnProperty(item, "output")) {
|
|
if (item.output === null) {
|
|
assert.strictEqual(
|
|
result.output,
|
|
item.code,
|
|
"Expected no autofixes to be suggested"
|
|
);
|
|
} else {
|
|
assert.strictEqual(result.output, item.output, "Output is incorrect.");
|
|
}
|
|
} else {
|
|
assert.strictEqual(
|
|
result.output,
|
|
item.code,
|
|
"The rule fixed the code. Please add 'output' property."
|
|
);
|
|
}
|
|
|
|
assertASTDidntChange(result.beforeAST, result.afterAST);
|
|
}
|
|
|
|
/*
|
|
* This creates a mocha test suite and pipes all supplied info through
|
|
* one of the templates above.
|
|
* The test suites for valid/invalid are created conditionally as
|
|
* test runners (eg. vitest) fail for empty test suites.
|
|
*/
|
|
this.constructor.describe(ruleName, () => {
|
|
if (test.valid.length > 0) {
|
|
this.constructor.describe("valid", () => {
|
|
test.valid.forEach(valid => {
|
|
this.constructor[valid.only ? "itOnly" : "it"](
|
|
sanitize(typeof valid === "object" ? valid.name || valid.code : valid),
|
|
() => {
|
|
testValidTemplate(valid);
|
|
}
|
|
);
|
|
});
|
|
});
|
|
}
|
|
|
|
if (test.invalid.length > 0) {
|
|
this.constructor.describe("invalid", () => {
|
|
test.invalid.forEach(invalid => {
|
|
this.constructor[invalid.only ? "itOnly" : "it"](
|
|
sanitize(invalid.name || invalid.code),
|
|
() => {
|
|
testInvalidTemplate(invalid);
|
|
}
|
|
);
|
|
});
|
|
});
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
RuleTester[DESCRIBE] = RuleTester[IT] = RuleTester[IT_ONLY] = null;
|
|
|
|
module.exports = RuleTester;
|