Search⌘ K
AI Features
Home
Courses
Pure Functional HTTP APIs in Scala

Testing the Routes: Use Case - Updating

Explore methods to test Scala HTTP routes focused on updating products. Learn to validate responses to garbage input, update existing products, and handle non-existent products while ensuring database integrity and proper status codes.

We'll cover the following...

Garbage values

Scala
val expectedStatus = StatusCodes.BadRequest
s"return $expectedStatus" in {
  genProduct.sample match {
    case None => fail("Could not generate data sample!")
    case Some(p) =>
      for {
        _ <- repo.saveProduct(p)
        rows <- repo.loadProduct(p.id)
        resp <- http.singleRequest(
          HttpRequest(
            method = HttpMethods.PUT,
            uri = s"$baseUrl/product/${p.id}",
            headers = Seq(),
            entity = HttpEntity(
              contentType = ContentTypes.`application/json`,
              data = ByteString(scala.util.Random.alphanumeric.take(256).mkString)
            )
          )
        )
        rows2 <- repo.loadProduct(p.id)
      } yield {
        withClue("Seeding product data failed!")(rows must not be(empty))
        resp.status must be(expectedStatus)
        Product.fromDatabase(rows2) match {
          case None =>
            fail("Seeding product was not saved to database!")
            case Some(s) =>
              withClue("Existing product must not be changed!")(s mustEqual p)
        }
      }
  }
}

First, we test with garbage JSON in the request. Before making the request, we create a product to avoid getting an error caused by a possibility of missing product. Afterward, ...