Pure Functional HTTP APIs in Scala/

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Unit Tests

Unit Tests

Learn how to implement a base class and tests for unit testing.

We'll cover the following...

Base class for unit tests

To avoid repeating the construction of our unit test classes, we will implement a base class for tests, which is quite simple.

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abstract class BaseSpec extends WordSpec
  with MustMatchers with ScalaCheckPropertyChecks {}

We will be leaning towards the more verbose test styles, but we can essentially use any of the other test styles that ScalaTest offers.

Testing Product fromDatabase

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import com.wegtam.books.pfhais.impure.models.TypeGenerators._
forAll("input") { p: Product =>
  val rows = p.names.map(t => (p.id, t.lang.value, t.name.value)).toList
  Product.fromDatabase(rows) must contain(p)
}

The code above is a straightforward test of our helper function fromDatabase, which works in the following way:

  1. The forAll will generate a lot of Product entities using the generator (Line 3).
  2. From each entity, a list of “rows” is constructed as they would appear in
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