How to load node.js http module from intern.js test?
I am trying to use Intern testing framework to automate testing of a simple REST API implemented with node.js and StrongLoop. StrongLoop provides an explorer web page that I used to verify that the REST API is implemented and I can manually test the API from Postman.
The first API test I try with intern.js returns the number of media objects in the collection. The HTTP method is GET, a URL http://localhost:3000/api/media/count
, and the response is {"count": 2}.
When I run my intern.js test, I get the error "Error: Attempting to request to unload the http module".
I have a \ tests subdirectory in my node.js application. My test case: media.js:
define([
'intern!object',
'intern/chai!assert'
], function (registerSuite, assert, media) {
registerSuite({
name: 'media',
count: function() {
var http = require("http");
var request = http.request;
request({
url: "http://localhost:3000/api/media/count",
method: "GET"
}, function (error, response, body) {
console.log("Status", response.statusCode);
console.log("Headers", JSON.stringify(response.headers));
console.log("Response received", body);
});
assert.strictEqual(body, '{"count": 2}',
url + ' should return 2 items');
}
});
});
My intern.js config file:
// Learn more about configuring this file at <https://github.com/theintern/intern/wiki/Configuring-Intern>.
// These default settings work OK for most people. The options that *must* be changed below are the
// packages, suites, excludeInstrumentation, and (if you want functional tests) functionalSuites.
define({
// The port on which the instrumenting proxy will listen
proxyPort: 9000,
// A fully qualified URL to the Intern proxy
proxyUrl: 'http://localhost:9000/',
// Default desired capabilities for all environments. Individual capabilities can be overridden by any of the
// specified browser environments in the `environments` array below as well. See
// https://code.google.com/p/selenium/wiki/DesiredCapabilities for standard Selenium capabilities and
// https://saucelabs.com/docs/additional-config#desired-capabilities for Sauce Labs capabilities.
// Note that the `build` capability will be filled in with the current commit ID from the Travis CI environment
// automatically
capabilities: {
'selenium-version': '2.41.0'
},
// Browsers to run integration testing against. Note that version numbers must be strings if used with Sauce
// OnDemand. Options that will be permutated are browserName, version, platform, and platformVersion; any other
// capabilities options specified for an environment will be copied as-is
environments: [
{ browserName: 'internet explorer', version: '11', platform: 'Windows 8.1' },
{ browserName: 'internet explorer', version: '10', platform: 'Windows 8' },
{ browserName: 'internet explorer', version: '9', platform: 'Windows 7' },
{ browserName: 'firefox', version: '28', platform: [ 'OS X 10.9', 'Windows 7', 'Linux' ] },
{ browserName: 'chrome', version: '34', platform: [ 'OS X 10.9', 'Windows 7', 'Linux' ] },
{ browserName: 'safari', version: '6', platform: 'OS X 10.8' },
{ browserName: 'safari', version: '7', platform: 'OS X 10.9' }
],
// Maximum number of simultaneous integration tests that should be executed on the remote WebDriver service
maxConcurrency: 3,
// Name of the tunnel class to use for WebDriver tests
tunnel: 'SauceLabsTunnel',
// The desired AMD loader to use when running unit tests (client.html/client.js). Omit to use the default Dojo
// loader
useLoader: {
'host-node': 'dojo/dojo',
'host-browser': 'node_modules/dojo/dojo.js'
},
// Configuration options for the module loader; any AMD configuration options supported by the specified AMD loader
// can be used here
loader: {
// Packages that should be registered with the loader in each testing environment
packages: [
{ name: 'app', location: '.' },
]
},
// Non-functional test suite(s) to run in each browser
suites: [ 'tests/media' /* 'myPackage/tests/foo', 'myPackage/tests/bar' */ ],
// Functional test suite(s) to run in each browser once non-functional tests are completed
functionalSuites: [ /* 'myPackage/tests/functional' */ ],
// A regular expression matching URLs to files that should not be included in code coverage analysis
excludeInstrumentation: /^(?:tests|node_modules)\//
});
I run the test using the command `c: \ Repositories \ app> intern-client config = tests / intern 'and the following console output is given:
c:\Repositories\app>intern-client config=tests/intern
FAIL: main - media - count (0ms)
Error: Attempt to require unloaded module http.request
at contextRequire <D:\Users\username\AppData\Roaming\npm\node_modules\inte
rn\node_modules\dojo\dojo.js:255:12>
at req <D:\Users\username\AppData\Roaming\npm\node_modules\intern\node_mod
ules\dojo\dojo.js:30:10>
at Test.registerSuite.count [as test] <tests\media.js:23:27>
at Test.run <D:\Users\username\AppData\Roaming\npm\node_modules\intern\lib
\Test.js:169:19>
at <D:\Users\username\AppData\Roaming\npm\node_modules\intern\lib\Suite.js:
237:13>
at signalListener <D:\Users\username\AppData\Roaming\npm\node_modules\inte
rn\node_modules\dojo\Deferred.js:37:21>
at Promise.then.promise.then <D:\Users\username\AppData\Roaming\npm\node_m
odules\intern\node_modules\dojo\Deferred.js:258:5>
at runTest <D:\Users\username\AppData\Roaming\npm\node_modules\intern\lib\
Suite.js:236:46>
at <D:\Users\username\AppData\Roaming\npm\node_modules\intern\lib\Suite.js:
249:7>
at process._tickCallback <node.js:419:13>
1/1 tests failed
1/1 tests failed
---------------|-----------|-----------|-----------|-----------|
File | % Stmts |% Branches | % Funcs | % Lines |
---------------|-----------|-----------|-----------|-----------|
tests\ | 33.33 | 100 | 66.67 | 33.33 |
media.js | 33.33 | 100 | 66.67 | 33.33 |
---------------|-----------|-----------|-----------|-----------|
All files | 33.33 | 100 | 66.67 | 33.33 |
---------------|-----------|-----------|-----------|-----------|
I understand that the http module is the main module automatically installed with node.js, however I am wondering if intern.js, although node does, does not support access to the main modules without additional configuration. This seam is sensible, however I have looked at the intern.js tutorial and intern.js setup guide but have not found a way to add a link or dependency so the test case can load the node.js http module successfully. I'm new to intern.js, so expect that I haven't configured it or test correctly.
I welcome any input / understanding of what I am doing wrong.
Regards,
MW
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Intern runs its tests in AMD environment, so require
it is AMD bootloader require
, not Node, hence your mistake.
To load Node modules use intern/dojo/node!
AMD plugin and enable them depending on your module, for example:
define([
...,
'intern/dojo/node!http'
], function (..., http) {
// Now http contains the exports of Node http module
});
This is covered in the Intern User Guide under Testing CommonJS Modules .
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