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How to use mutantsToPlace method in stryker-parent

Best JavaScript code snippet using stryker-parent

babel-transformer.ts

Source:babel-transformer.ts

1import { NodePath, traverse, types } from '@babel/core';2/* eslint-disable @typescript-eslint/no-duplicate-imports */3// @ts-expect-error The babel types don't define "File" yet4import { File } from '@babel/core';5/* eslint-enable @typescript-eslint/no-duplicate-imports */6import { allMutators } from '../mutators';7import { instrumentationBabelHeader, isImportDeclaration, isTypeNode, locationIncluded, locationOverlaps } from '../util/syntax-helpers';8import { ScriptFormat } from '../syntax';9import { allMutantPlacers, MutantPlacer, throwPlacementError } from '../mutant-placers';10import { Mutable, Mutant } from '../mutant';11import { DirectiveBookkeeper } from './directive-bookkeeper';12import { AstTransformer } from '.';13interface MutantsPlacement<TNode extends types.Node> {14  appliedMutants: Map<Mutant, TNode>;15  placer: MutantPlacer<TNode>;16}17type PlacementMap = Map<types.Node, MutantsPlacement<types.Node>>;18export const transformBabel: AstTransformer<ScriptFormat> = (19  { root, originFileName, rawContent, offset },20  mutantCollector,21  { options },22  mutators = allMutators,23  mutantPlacers = allMutantPlacers24) => {25  // Wrap the AST in a `new File`, so `nodePath.buildCodeFrameError` works26  // https://github.com/babel/babel/issues/1188927  const file = new File({ filename: originFileName }, { code: rawContent, ast: root });28  // Range filters that are in scope for the current file29  const mutantRangesForCurrentFile = options.mutationRanges.filter((mutantRange) => mutantRange.fileName === originFileName);30  // Create a placementMap for the mutation switching bookkeeping31  const placementMap: PlacementMap = new Map();32  // Create the bookkeeper responsible for the // Stryker ... directives33  const directiveBookkeeper = new DirectiveBookkeeper();34  // Now start the actual traversing of the AST35  //36  // On the way down:37  // * Treat the tree as immutable.38  // * Identify the nodes that can be used to place mutants on in the placement map.39  // * Generate the mutants on each node.40  //    * When a node generated mutants, do a short walk back up and register them in the placement map41  //    * Call the `applied` method using the placement node, that way the mutant will capture the AST with mutation all the way to the placement node42  //43  // On the way up:44  // * If this node has mutants in the placementMap, place them in the AST.45  //46  // eslint-disable-next-line @typescript-eslint/no-unsafe-argument47  traverse(file.ast, {48    enter(path) {49      directiveBookkeeper.processStrykerDirectives(path.node);50      if (shouldSkip(path)) {51        path.skip();52      } else {53        addToPlacementMapIfPossible(path);54        if (!mutantRangesForCurrentFile.length || mutantRangesForCurrentFile.some((range) => locationIncluded(range, path.node.loc!))) {55          const mutantsToPlace = collectMutants(path);56          if (mutantsToPlace.length) {57            registerInPlacementMap(path, mutantsToPlace);58          }59        }60      }61    },62    exit(path) {63      placeMutantsIfNeeded(path);64    },65  });66  if (mutantCollector.hasPlacedMutants(originFileName)) {67    // Be sure to leave comments like `// @flow` in.68    let header = instrumentationBabelHeader;69    if (Array.isArray(root.program.body[0]?.leadingComments)) {70      header = [71        {72          ...instrumentationBabelHeader[0],73          leadingComments: root.program.body[0]?.leadingComments,74        },75        ...instrumentationBabelHeader.slice(1),76      ];77    }78    root.program.body.unshift(...header);79  }80  /**81   *  If mutants were collected, be sure to register them in the placement map.82   */83  function registerInPlacementMap(path: NodePath, mutantsToPlace: Mutant[]) {84    const placementPath = path.find((ancestor) => placementMap.has(ancestor.node));85    if (placementPath) {86      const appliedMutants = placementMap.get(placementPath.node)!.appliedMutants;87      mutantsToPlace.forEach((mutant) => appliedMutants.set(mutant, mutant.applied(placementPath.node)));88    } else {89      throw new Error(`Mutants cannot be placed. This shouldn't happen! Unplaced mutants: ${JSON.stringify(mutantsToPlace, null, 2)}`);90    }91  }92  /**93   * If this node can be used to place mutants on, add to the placement map94   */95  function addToPlacementMapIfPossible(path: NodePath) {96    const placer = mutantPlacers.find((p) => p.canPlace(path));97    if (placer) {98      placementMap.set(path.node, { appliedMutants: new Map(), placer });99    }100  }101  /**102   * Don't traverse import declarations, decorators and nodes that don't have overlap with the selected mutation ranges103   */104  function shouldSkip(path: NodePath) {105    return (106      isTypeNode(path) ||107      isImportDeclaration(path) ||108      path.isDecorator() ||109      (mutantRangesForCurrentFile.length && mutantRangesForCurrentFile.every((range) => !locationOverlaps(range, path.node.loc!)))110    );111  }112  /**113   * Place mutants that are assigned to the current node path (on exit)114   */115  function placeMutantsIfNeeded(path: NodePath<types.Node>) {116    const mutantsPlacement = placementMap.get(path.node);117    if (mutantsPlacement?.appliedMutants.size) {118      try {119        mutantsPlacement.placer.place(path, mutantsPlacement.appliedMutants);120        path.skip();121      } catch (error) {122        throwPlacementError(error as Error, path, mutantsPlacement.placer, [...mutantsPlacement.appliedMutants.keys()], originFileName);123      }124    }125  }126  /**127   * Collect the mutants for the current node and return the non-ignored.128   */129  function collectMutants(path: NodePath) {130    return [...mutate(path)]131      .map((mutable) => mutantCollector.collect(originFileName, path.node, mutable, offset))132      .filter((mutant) => !mutant.ignoreReason);133  }134  /**135   * Generate mutants for the current node.136   */137  function* mutate(node: NodePath): Iterable<Mutable> {138    for (const mutator of mutators) {139      for (const replacement of mutator.mutate(node)) {140        yield {141          replacement,142          mutatorName: mutator.name,143          ignoreReason: directiveBookkeeper.findIgnoreReason(node.node.loc!.start.line, mutator.name) ?? formatIgnoreReason(mutator.name),144        };145      }146    }147    function formatIgnoreReason(mutatorName: string): string | undefined {148      if (options.excludedMutations.includes(mutatorName)) {149        return `Ignored because of excluded mutation "${mutatorName}"`;150      } else {151        return undefined;152      }153    }154  }...

Using AI Code Generation

1const mutantsToPlace = require('stryker-parent').mutantsToPlace;2const mutants = mutantsToPlace();3console.log(mutants);4module.exports = {5  mutantsToPlace: () => {6    return ['mutant1', 'mutant2'];7  }8};9{10}11{12  "dependencies": {13  }14}15module.exports = function(config) {16  config.set({17    commandRunner: {18    }19  });20};21[2017-02-15 12:37:45.600] [INFO] SandboxPool - Creating 1 test runners (based on CPU count)

Using AI Code Generation

1var mutantsToPlace = require('stryker-parent').mutantsToPlace;2var mutants = mutantsToPlace(4, 2);3console.log(mutants);4var mutantsToPlace = require('./lib/mutantsToPlace');5module.exports = {6};7module.exports = function mutantsToPlace(totalMutants, numberOfMutantsToPlace) {8  return totalMutants - numberOfMutantsToPlace;9};

Using AI Code Generation

1var mutants = require('stryker-api/mutant');2var Stryker = require('stryker');3var stryker = new Stryker();4var mutantsToPlace = stryker.mutantsToPlace(mutants);5console.log(mutantsToPlace);6var Mutant = require('stryker-api/mutant');7var mutant = new Mutant();8console.log(mutant);9var Mutant = require('stryker');10var mutant = new Mutant();11console.log(mutant);12var Stryker = require('stryker').default;13var stryker = new Stryker();14var mutantsToPlace = stryker.mutantsToPlace(mutants);15console.log(mutantsToPlace);

Using AI Code Generation

1var mutantsToPlace = require('stryker-parent').mutantsToPlace;2console.log(mutants);3module.exports = {4  mutantsToPlace: function (numberOfMutants) {5    return numberOfMutants;6  }7};8{9  "scripts": {10  },11}12{13  "scripts": {14  },15}16module.exports = {17  mutantsToPlace: function (numberOfMutants) {18    return numberOfMutants;19  }20};21{22  "scripts": {23  },24}25var api = require('stryker-api

Using AI Code Generation

1var mutantsToPlace = require('stryker-parent').mutantsToPlace;2var mutants = mutantsToPlace('test.js', 'var x = 1 + 1;', 1);3console.log(mutants);4var mutantsToPlace = require('stryker-parent').mutantsToPlace;5var mutants = mutantsToPlace('test.js', 'var x = 1 + 1;', 2);6console.log(mutants);7var mutantsToPlace = require('stryker-parent').mutantsToPlace;8var mutants = mutantsToPlace('test.js', 'var x = 1 + 1;', 3);9console.log(mutants);10var mutantsToPlace = require('stryker-parent').mutantsToPlace;11var mutants = mutantsToPlace('test.js', 'var x = 1 + 1;', 4);12console.log(mutants);13var mutantsToPlace = require('stryker-parent').mutantsToPlace;14var mutants = mutantsToPlace('test.js', 'var x = 1 + 1;', 5);15console.log(mutants);

Using AI Code Generation

1const mutantsToPlace = require('stryker-parent').mutantsToPlace;2mutantsToPlace(100, 1);3const mutantsToPlace = require('stryker-parent').mutantsToPlace;4mutantsToPlace(100, 1);5const mutantsToPlace = require('stryker-parent').mutantsToPlace;6mutantsToPlace(100, 1);7const mutantsToPlace = require('stryker-parent').mutantsToPlace;8mutantsToPlace(100, 1);9const mutantsToPlace = require('stryker-parent').mutantsToPlace;10mutantsToPlace(100, 1);11const mutantsToPlace = require('stryker-parent').mutantsToPlace;12mutantsToPlace(100, 1);13const mutantsToPlace = require('stryker-parent').mutantsToPlace;14mutantsToPlace(100, 1);15const mutantsToPlace = require('stryker-parent').mutantsToPlace;16mutantsToPlace(100, 1);17const TestRunner = require('stryker-test-runner');

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