Simple, intuitive mocking of Node.js modules. 

boblauer

mock-require

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const getCallerFile = require('get-caller-file');

const normalize = require('normalize-path');

Module._load = function(request, parent) {

  if (!parent) return originalLoader.apply(this, arguments);

  const fullFilePath = getFullPathNormalized(request, parent.filename);

  if (pendingMockExports.hasOwnProperty(fullFilePath)) {

    mockExports[fullFilePath] = typeof pendingMockExports[fullFilePath] === 'string' ?

      require(pendingMockExports[fullFilePath]) :

    delete pendingMockExports[fullFilePath];

  return mockExports.hasOwnProperty(fullFilePath)

    : originalLoader.apply(this, arguments);

function startMocking(path, mockExport) {

    mockExport = getFullPathNormalized(mockExport, calledFrom);

  pendingMockExports[getFullPathNormalized(path, calledFrom)] = mockExport;

  const fullPath = getFullPathNormalized(path, calledFrom);

  const module = getFullPathNormalized(path, getCallerFile());

  delete require.cache[require.resolve(module)];

      return resolve(process.cwd(), nodePath) + '/';

      return resolve(process.cwd(), nodePath) + pathsep;

      return resolvedPath.indexOf(fullNodePath) === 0;

    resolvedPath = require.resolve(path);

  const isLocalModule = /^\.{1,2}[/\\]?/.test(path);

  const isInPath = isInNodePath(resolvedPath);

  const isExternal = !isLocalModule && /[/\\]node_modules[/\\]/.test(resolvedPath);

  const isSystemModule = resolvedPath === path;

  if (isExternal || isSystemModule || isInPath) {

  const localModuleName = join(dirname(calledFrom), path);

    return Module._resolveFilename(localModuleName);

    if (isModuleNotFoundError(e)) { return localModuleName; } else { throw e; }

function getFullPathNormalized(path, calledFrom) {

  return normalize(getFullPath(path, calledFrom));

  return e.code && e.code === 'MODULE_NOT_FOUND';

  "description": "Simple, intuitive mocking of Node.js modules.",

    "test": "NODE_PATH=test/node-path mocha ./test/runner"

    "test": "cross-env NODE_PATH=test/node-path mocha ./test/runner"

    "url": "https://github.com/boblauer/mock-require.git"

  "author": "Bob Lauer <rlauer@gmail.com>",

    "url": "https://github.com/boblauer/mock-require/issues"

  "homepage": "https://github.com/boblauer/mock-require",

		@@ -7,2 +7,3 @@ 'use strict';
		const resolve = require('path').resolve;
		const pathsep = require('path').sep;
		const getCallerFile = require('get-caller-file');
		@@ -66,3 +67,3 @@ const normalize = require('normalize-path');
		.map((nodePath) => {
		return resolve(process.cwd(), nodePath) + '/';
		return resolve(process.cwd(), nodePath) + pathsep;
		})
		@@ -69,0 +70,0 @@ .some((fullNodePath) => {

		{
		"name": "mock-require",
		"version": "3.0.2",
		"version": "3.0.3",
		"description": "Simple, intuitive mocking of Node.js modules.",
		@@ -14,2 +14,3 @@ "main": "index.js",
		"devDependencies": {
		"cross-env": "^5.2.0",
		"eslint": "^4.15.0",
		@@ -20,3 +21,3 @@ "mocha": "^4.1.0"
		"lint": "eslint .",
		"test": "NODE_PATH=test/node-path mocha ./test/runner"
		"test": "cross-env NODE_PATH=test/node-path mocha ./test/runner"
		},
		@@ -23,0 +24,0 @@ "repository": {

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