proxyquire - npm Package Compare versions

Comparing version 1.2.0 to 1.3.0

lib/proxyquire.js

@@ -122,2 +122,4 @@ 'use strict';
   for (var key in stubs) {
+    if (stubs[key] === null) continue;
+
     if (stubs[key].hasOwnProperty('@global')) {
@@ -145,2 +147,9 @@ this._containsGlobal = true;
 
+    if (stub === null) {
+      // Mimic the module-not-found exception thrown by node.js.
+      var notfound = new Error("Cannot find module '" +  path + "'");
+      notfound.code = 'MODULE_NOT_FOUND';
+      throw notfound;
+    }
+
     if (stub.hasOwnProperty('@noCallThru') ? !stub['@noCallThru'] : !this._noCallThru) {
@@ -147,0 +156,0 @@ fillMissingKeys(stub, Module._load(path, module));

package.json

 {
   "name": "proxyquire",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "Proxies nodejs require in order to allow overriding dependencies during testing.",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -65,2 +65,3 @@ # proxyquire [![Build Status](https://secure.travis-ci.org/thlorenz/proxyquire.png)](http://travis-ci.org/thlorenz/proxyquire)
       - [All together, now](#all-together-now)
+  - [Using proxyquire to simulate the absence of Modules](#using-proxyquire-to-simulate-the-absence-of-modules)
   - [Forcing proxyquire to reload modules](#forcing-proxyquire-to-reload-modules)
@@ -165,2 +166,29 @@ - [Globally override require](#globally-override-require)
 
+## Using proxyquire to simulate the absence of Modules
+
+Some libraries may behave differently in the presence of absence of a
+package, for example:
+
+```javascript
+var cluster;
+try {
+  cluster = require('cluster');
+} catch(e) {
+  // cluster module is not present.
+  cluster = null
+}
+if (cluster) {
+  // Then provide some functionality for a cluster-aware version of Node.js
+} else {
+  // and some alternative for a cluster-unaware version.
+}
+```
+
+To exercise the second branch of the `if` statement, you can make proxyquire pretend the package isn't present by
+setting the stub for it to `null`. This works even if a `cluster` module is actually present.
+
+```javascript
+var foo = proxyquire('./foo', { cluster: null });
+```
+
 ## Forcing proxyquire to reload modules
@@ -167,0 +195,0 @@

test/samples/foo.js

@@ -7,7 +7,11 @@ var stats = require('./stats')
   , path = require('path')
+  , crypto
   ;
 
+// Require if present.
+try { crypto = require('crypto'); } catch (e) { crypto = 'caught'; }
+
 stats.incFooRequires();
 
-function bigBar () { 
+function bigBar () {
   // inline require
@@ -30,2 +34,6 @@ return require('./bar').bar().toUpperCase();
 
+function bigCrypto () {
+  return crypto;
+}
+
 module.exports = {
@@ -39,3 +47,4 @@ bigBar: bigBar
   , foobool: foobool
+  , bigCrypto: bigCrypto
   , state: ''
 };

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Improved metrics

Total package byte prevSize

57654

increased by3.5%

Number of package files

51

increased by2%

Lines of code

1232

increased by2.84%

Number of lines in readme file

433

increased by6.91%

No dependency changes