Mocking ES6 module dependencies with proxyquire

In part one, I wrote about mocking ES6 module dependencies using the ES6 native import * from construct. It works mostly fine. However, you need to be aware of a potential issue:

  • You need to import modules to mock them, which means that those modules will be evaluated. That may be a problem if you don’t want the code in this modules to be executed.

Another method I found to work well is using proxyquire.  It is one of many libraries aiming to streamline mocking dependencies to simplify unit testing.

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Mocking ES6 module dependencies with import * from

Not so long ago I faced a problem: I needed to mock ES6 module’s dependencies for unit testing. The reason for mocking dependencies in unit tests is the following: when I write a unit test, I want to test the functionality of a single unit of code, hence a unit test. However, if a module has any dependencies, those dependencies need be satisfied. That may mean importing and executing code in other modules. As a result, the unit test loses its purity – the test results will depend not only on the module I’m focusing on but also on the other code my module depends on.

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How to set up Git on Windows

I finally found a way to set up Git on Windows in a way that it isn’t painful to use. Here’s how to do that: Uninstall all installations of git, TortoiseGit, etc. Install Git Extensions. The easiest way to do that is via Chocolatey package manager: Install Chocolatey Install Git Extension package package. Install Git Credentials Manager for Windows That’s it. Git Extensions come with a handy fully-functional UI. Read more →

How to install CyanogenMod on Oneplus One

I really like my OnePlus One phone. It is an exemplary engineering achievement proving that it is possible to design a mobile phone as powerful as leading brand’s flagship models but costing half of their price. Oneplus One is powered by Cyanogen OS, an open source OS based on Android Open Source Project (AOSP). Cyanogen OS has its own update cycles, which OnePlus One receives via over-the-air (OTA) updates. When I bought the phone, it had Cyanogen OS 11 installed, based on Android™ 4. Read more →

How to identify Oracle sessions consuming CPU time

Identifying sessions consuming CPU time is a common task in Oracle performance tuning. However, as simple as it sounds, it is not that straightforward. Oracle recommends using Enterprise Manager or Automatic Workload Repository for that. The problem is that in real-life situations Enterprise Manager is often not installed, or you may not have access to it. You may not also have necessary privileges to run AWS. Besides, running AWS reports for such a simple task sounds like overkill. Read more →

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