Recently, a colleague repeatedly executed an Android emulator-based test to check if the test was flaky. Out of these 100 executions, one execution had failed due to ConcurrentModificationException in the AndroidX Test library.
Since we were looking for flakiness reasons in the test and environment, it was strange to see…
In software, we come across three common types of tests: unit tests, integration tests, and end-to-end (e2e) tests.
While designing software, we start with an abstract description of the use case and decompose it into basic steps in terms of the feature of the underlying system. Since the feasibility and…
Consider a client (e.g., a messaging mobile app) that interacts with a service (e.g., the corresponding messaging service).
We have three options to test this client.
Recently, I upgraded to R 4.0.1. To avoid broken packages, I started updating installed packages using installed.packages() and install.packages(). This solution was less than ideal because, if a dependee package was not built for R 4.0.1, then the dependent package failed to build and install.
These books cover design trade-offs to consider when scaling systems, the cost and benefits of each design choice, and how current technologies embrace and influence these design choices. They do so while being focused on practice.
Books 1 and 2 are more high-level and cover aspects relevant when designing and…
Recently, while writing an article about logging in Python, I started identifying artifacts and actions that we commonly use when we talk about logging. Here’s what I came up with.
When we use a logging library, we perform/trigger the following common tasks while using the associated concepts (highlighted in bold).
…
Few things to ponder about; more so, if you deal with data.
Recently, while reading about MPI, I stumbled on the mpi4py library that brings MPI to Python. Given my past familiarity with Python’s multiprocessing module, I was curious how would the performance of MPI compare the performance of multiprocessing module. So, I performed a small experiment.
Since mpi4py is based on…
In object-oriented languages like Java, C#, or Kotlin, given a type T, an associated view type TView is used to expose a specific view (parts) of an object of type T. This helps hide implementation details.
For example, in the following Kotlin example, Ledger interface is used to provide access…
