Questions tagged [expecto]

Expecto is a testing library for F#, written by Henrik Feldt:

• F# syntax throughout, tests as values; write plain F# to generate tests
• Use the built-in Expect module, or an external lib like Unquote for assertions
• Parallel tests by default
• Test your Hopac code or your Async code; Expecto is async throughout
• Pluggable logging and metrics via Logary Facade; easily write adapters for build systems, or use the timing mechanism for building an InfluxDB+Grafana dashboard of your tests' execution times
• Built in support for BenchmarkDotNet
• Build in support for FsCheck; makes it easy to build tests with generated/random data or building invariant-models of your object's/actor's state space

Hello world looks like this

open Expecto

let tests =
  test "A simple test" {
    let subject = "Hello World"
    Expect.equal subject "Hello World" "The strings should equal"
  }

[<EntryPoint>]
let main args =
  runTestsWithArgs defaultConfig args tests