Node.js – How to avoid timeouts in mocha testcases

mocha.jsnode.jssupertestunit testing

Here I am attaching my code, I am passing done callback and using supertest for request. Since I am using assert/expect in my testcase inside request.end block why I need to worry about timeout? What is mistake I am making here.

it('should get battle results ', function(done) {
    request(url)
      .post('/compare?vf_id='+vf_id)
      .set('access_token',access_token)
      .send(battleInstance)
      .end(function(err, res){  // why need timeout
        if (err) return done(err);
        console.log(JSON.stringify(res.body));
        expect(res.body.status).to.deep.equal('SUCCESS');
        done();
      });
 });

Testcase results following response:
Error: timeout of 2000ms exceeded. Ensure the done() callback is being called in this test.

If I am running my testcases with mocha command then its show this error while If I am running test mocha --timeout 15000 then testcase is passing correctly. But I want to avoid timeout, How can I do that?

Best Answer

If I am running my testcases with mocha command then its show this error while If I am running test mocha --timeout 15000 then testcase is passing correctly. But I want to avoid timeout, How can I do that?

You can't avoid timeouts, since it looks like you're testing a remote service. If, for whatever reason, the request to that service takes a long time, you will run into timeouts.

You can tell Mocha to disable for timeout checking by setting the timeout to 0, but that's probably also not ideal because it may cause each test case to take an excessive amount of time.

As an alternative, you can mock request (which I assume is superagent) so you can control the entire HTTP request/response flow, but since it looks like you're testing a remote service (one which you have no control over) that would make this particular test case moot.

Related Solutions

Java – How to test a class that has private methods, fields or inner classes

Update:

Some 10 years later perhaps the best way to test a private method, or any inaccessible member, is via @Jailbreak from the Manifold framework.
@Jailbreak Foo foo = new Foo();
// Direct, *type-safe* access to *all* foo's members
foo.privateMethod(x, y, z);
foo.privateField = value;
This way your code remains type-safe and readable. No design compromises, no overexposing methods and fields for the sake of tests.

If you have somewhat of a legacy Java application, and you're not allowed to change the visibility of your methods, the best way to test private methods is to use reflection.

Internally we're using helpers to get/set private and private static variables as well as invoke private and private static methods. The following patterns will let you do pretty much anything related to the private methods and fields. Of course, you can't change private static final variables through reflection.

Method method = TargetClass.getDeclaredMethod(methodName, argClasses);
method.setAccessible(true);
return method.invoke(targetObject, argObjects);

And for fields:

Field field = TargetClass.getDeclaredField(fieldName);
field.setAccessible(true);
field.set(object, value);

Notes:
1. TargetClass.getDeclaredMethod(methodName, argClasses) lets you look into private methods. The same thing applies for getDeclaredField.
2. The setAccessible(true) is required to play around with privates.

Javascript – How to pass command line arguments to a Node.js program

Standard Method (no library)

The arguments are stored in process.argv

Here are the node docs on handling command line args:

process.argv is an array containing the command line arguments. The first element will be 'node', the second element will be the name of the JavaScript file. The next elements will be any additional command line arguments.

// print process.argv
process.argv.forEach(function (val, index, array) {
  console.log(index + ': ' + val);
});

This will generate:

$ node process-2.js one two=three four
0: node
1: /Users/mjr/work/node/process-2.js
2: one
3: two=three
4: four

Best Answer

Related Solutions

Java – How to test a class that has private methods, fields or inner classes

Javascript – How to pass command line arguments to a Node.js program

Standard Method (no library)

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