mkrisher / scala_test

Examples of ScalaTest for comparison to Ruby/Rspec

An intro to ScalaTest for Rubyists

A repo/playground for exploring various aspects of ScalaTest

Running tests

sbt test

Or in the sbt console

sbt

test

or

test:testOnly *CaculatorTest

Notes

The first commit includes the scaffolding of the project built using the sbt scalatest template

The second commit shows an example of how to test a class (instance methods and class functions) using FunSpec, which is similar to RSpec for Ruby

A later commit adds the equivalent Ruby and RSpec classes and specs as comments at the bottom of the Scala files for comparison

A later commit includes an example of mocking an object using Mockito

A later commit includes an example of a Scala Option. Nulls are frowned upon in Scala. So rather than doing null checks, Scala has an Option type. If you do not set a value, the Option will return None. Option in some ways is the equivalent of the Ruby ||= operator. If an Option has a value, it is wrapped in a Some object. You get to the actual value using .getOrElse or .map.