Explore creating robust HTTP services in Scala's functional programming paradigm. Gain insights into pure vs. impure implementations, their pros and cons, and effective tool usage.

scala-platform.tar.gz

Scala-Pure

Scala-Impure

Scala-Tapir

Scala-Impure-Test

Scala-Pure-Test

Scala-Tapir-Test

Test

Scala - Run Code Widget 

Scala-Pure-copy

Scala is one of the most popular general-purpose languages that supports both object-oriented and functional programming. In this course, you will learn how to create back-end HTTP services using Scala's functional programming paradigm.

You will also learn how to develop, test, and document the service using both pure and impure ways. You will be exposed to the differences between pure and impure implementation, their respective pros and cons, and how pure implementation can be more robust in terms of performance, understandability, testability, and type safeness. 

By the end of the course, you will have a clear idea of how functional programming works in Scala and how you can use the available tools more effectively.

Pure Functional HTTP APIs in Scala

## What do we have left to test?

It seems the only parts left to test are the `FlywayDatabaseMigrator` and our `DoobieRepository` classes. Testing them will require a running database, so we leave the cozy world of unit tests behind and venture into integration test land. But fear not, we already have some — albeit impure — experience here.


## `BaseSpec` for pure integration tests
As usual, we start by implementing a base class that we can use to provide common settings and functions across our tests.




# What do we have left to test?

It seems the only parts left to test are the `FlywayDatabaseMigrator` and our `DoobieRepository` classes. Testing them will require a running database, so we leave the cozy world of unit tests behind and venture into integration test land. But fear not, we already have some — albeit impure — experience here.


# `BaseSpec` for pure integration tests
As usual, we start by implementing a base class that we can use to provide common settings and functions across our tests.




Learn how to set up integration tests for our pure service using a BaseSpec.

Introduction

Impure Implementation

Pure Implementation

Testing Impure Services

Testing Pure Services

Benchmarks

Documentation

Epilogue

Integration Tests Setup

What do we have left to test?