Registering a Concrete Class Instead of an Interface: A Small DI Detail With a Big Testing Cost
Dependency Injection registration often gets reviewed for one thing: which lifetime was chosen — Singleton, Scoped, or Transient. A separate, easy-t…
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Testing Rust Code Without Adding Test-Only Traits
A common pattern in Rust unit tests looks like this: You have a small function that calls the filesystem, a clock, a socket, an FFI function, or som…
Pytest Pt1 - Fundamentals for Data Engineers
Pytest Fundamentals for Data Engineers Data engineering code is still software, and software that doesn't have tests is a liability. If you've ever…