JarCastingExpecty - Power Assertions for Scala
Expecty brings power assertions as known from Groovy and Spock to the Scala language. It is a micro library that aims to do one thing well.
License and Credits
Expecty was originally written by Peter Niederwieser, author of Spock.
Expecty is licensed under the Apache 2 license.
Setup
libraryDependencies += "com.eed3si9n.expecty" %% "expecty" % "0.15.1" % Test
Code Examples
Welcome to Scala 2.12.8 (OpenJDK 64-Bit Server VM, Java 1.8.0_212).
Type in expressions for evaluation. Or try :help.
scala> import com.eed3si9n.expecty.Expecty.assert
import com.eed3si9n.expecty.Expecty.assert
scala> case class Person(name: String = "Fred", age: Int = 42) {
| def say(words: String*) = words.mkString(" ")
| }
defined class Person
scala> val person = Person()
person: Person = Person(Fred,42)
scala> // Passing expectations
scala> assert(person.name == "Fred")
scala> assert(person.age * 2 == 84)
scala> assert(person.say("Hi", "from", "Expecty!") == "Hi from Expecty!")
scala> // Failing expectation
scala> val word1 = "ping"
word1: String = ping
scala> val word2 = "pong"
word2: String = pong
scala> assert(person.say(word1, word2) == "pong pong")
java.lang.AssertionError: assertion failed
assert(person.say(word1, word2) == "pong pong")
| | | | |
| | ping pong false
| ping pong
Person(Fred,42)
at com.eed3si9n.expecty.Expecty$ExpectyListener.expressionRecorded(Expecty.scala:35)
at com.eed3si9n.expecty.RecorderRuntime.recordExpression(RecorderRuntime.scala:39)
... 36 elided
scala> assert(person.age * 2 == 73, "age is not right")
java.lang.AssertionError: assertion failed: age is not right
assert(person.age * 2 == 73, "age is not right")
| | | |
| 42 84 false
Person(Fred,42)
at com.eed3si9n.expecty.Expecty$ExpectyListener.expressionRecorded(Expecty.scala:35)
at com.eed3si9n.expecty.RecorderRuntime.recordExpression(RecorderRuntime.scala:39)
... 36 elided
Further Examples
Have a look at ExpectySpec.scala and other specs in the same directory.