Backend services built on top of NestJS framework is able to utilize the test framework Jest. NestJS and Jest come up with solutions to develop unit tests and end-to-end tests. While both are necessary, they are out of scope of this document. Here we present a documentation for integration tests…

My education and career are like a roller coaster, bringing me up and down throughout the journey. Occasionally, I received a new achievement and was proud. Often, I failed in my endeavor and felt sick about it. I am grateful to be able to stand against the difficulties. Family, colleagues…

One of the SOLID Principles, the Dependency Inversion principle, says: “Entities must depend on abstractions, not on concretions. It states that the high-level module must not depend on the low-level module, but they should depend on abstractions.” …

Framework NestJS telah saya gunakan secara aktif selama 9 bulan ke belakang untuk men-develop backend. Fitur yang disediakan sangat membantu saya dan tim untuk men-deliver fitur bisnis lebih cepat dan tetap menjaga best practice. Saya ingin share 7 alasan framework ini bisa jadi pilihan ketika sahabat menggunakan Node.js. 1. Framework…

Bermodalkan ilmu dan pengalaman bekerja sebagai software engineer membuat saya berinisiatif untuk membuat website undangan pernikahan secara mandiri. Butuh waktu 3 bulan untuk development hingga akhirnya up to production. Berikut ini 6 pelajaran yang bisa dipetik dari proses pembuatan website tersebut. 1. Requirements gathering Requirements dikumpulkan dengan cara survey kepada diri sendiri, calon…

This article is a part of Design Pattern notebook by Fariz Mamad It is common if a class depends on other classes. Favorably, classes are loosely-coupled from their dependencies to make it more testable, modular, and maintainable. Loosely-coupled application can be achieved if we follow Dependency Inversion Principle. Dependency Injection…

This article is a part of Algorithm notebook by Fariz Mamad Algorithm performance depends on the input size and the number of operations it executes. We, the software engineer, have to analyze the performance worst case according to time-space tradeoff. O-Notation helps us analyze the worst case a.k.a. the upper…

This article is a part of User Interface development notebook by Fariz Mamad UI design may have typical components or widgets ratio to make it aesthetic. We, the UI developer, have to scale the ratio of widgets appropriately within the screen. Flex helps us code the ratio. In short, flex…

I have a bad experience when leading a development project, which was when the back-end developers and UI developers were debating about the API contract. We have already made request and response contracts in a meeting. However, when the contracts were implemented, they were not match. Why? …