µTest
testcontainers-scala
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µTest | testcontainers-scala | |
---|---|---|
2 | 2 | |
481 | 610 | |
-0.2% | 1.0% | |
4.2 | 7.4 | |
8 days ago | 17 days ago | |
Scala | Scala | |
- | MIT License |
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µTest
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From First Principles: Why Scala?
I am a Scala programmer & think it's a great language. Here are some arguments for why not Scala:
* Li's libs (os-lib, upickle, utest) have clean public interfaces, but most Scala ecosystem libs are hard to use
* The Mill build tool looks a lot better than SBT, but seems like everyone is still using SBT
* Scala minor version are binary incompatible, so maintaining Scala projects is a big pain. Upgrading Spark from Scala 2.11 to Scala 2.12 was a massive undertaking for example.
* Scala has tons of language features and lets people do crazy things in the code. Hard to win technical arguments with Scala geniuses that like using complicated language features.
* Scalatest is stil used by most projects and is annoying to use, as described here: https://github.com/lihaoyi/utest#why-utest
I'm optimistic about Scala. There are some folks that love the language and are continuously improving the ecosystem. Scala 3 will have to sell a better story about ditching legacy tooling and giving users a better default stack if it wants to compete with modern Go/Rust/Python.
Let's clarify some points for folks not so familiar with Scala.
> * Scala minor version are binary incompatible, so maintaining Scala projects is a big pain. Upgrading Spark from Scala 2.11 to Scala 2.12 was a massive undertaking for example.
Scala just chose a strange naming scheme. Other languages would have just increased their major version instead. The scala minor version is increased every few years and not every month or so.
> * Scala has tons of language features and lets people do crazy things in the code.
Actually, that's not true. Or rather: compared to what language?
Scala has surprisingly few language features, but the ones it has are very flexible and powerful. Take Kotlin for example. It has method extensions as a dedicated feature. Scala just has implicits which can be used for method extension.
> * Scalatest is stil used by most projects and is annoying to use, as described here: https://github.com/lihaoyi/utest#why-utest. The overuse of DSLs in Scala is really annoying.
I agree with the overuse of DSLs. Luckily that got much better, but older libraries like scalatest still suffer from that.
> * Li's libs (os-lib, upickle, utest) have clean public interfaces, but most Scala ecosystem libs are hard to use, see the JSON alternatives for examples
I think that just comes from using the library in a non-idiomatic way. In most applications, you will need to use the whole json anyways, and then you use (or can use) circe like that:
{
testcontainers-scala
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Confusion about Tagless Final
Let me highly recommend integration tests with testcontainers-scala, especially with Weaver Test using this snippet. Weaver is a great test framework, and testcontainers-scala is IMO simply the right way to do integration tests.
- ZIO: Mock Kafka Producer from zio.kafka
What are some alternatives?
ScalaMock - Native Scala mocking framework
Diffy
scalaprops - property based testing library for Scala
Scala Test-State - Scala Test-State.
Gatling - Modern Load Testing as Code
Scalive - Connect a Scala REPL to running JVM processes without any prior setup
ScalaCheck - Property-based testing for Scala
Minitest - The super light testing library for Scala and Scala.js
ScalaTest - A testing tool for Scala and Java developers
Specs2 - Software Specifications for Scala
Testcontainers-scala - The project repository has moved to https://github.com/testcontainers/testcontainers-scala
Mockito Scala - Mockito for Scala language