Scalatest Matchers, awt. ScalaTest - writing custom matcher

Scalatest Matchers, awt. ScalaTest - writing custom matchers Asked 12 years, 7 months ago Modified 12 years, 4 months ago Viewed 2k times Matchers migration in ScalaTest 2. util. java. 0 - org. 1. Matchers import _root_. Matchers objectMatchers extends Matchers Companion object that facilitates the importing of Matchers members as an alternative to mixing it the trait. Matchers to the imports and extend your test class with Matchers trait. Stack import org. package com. push(1) stack. In this introductory tutorial, we’ll start by creating our first test before examining its supp 9. The implicit conversion that adds should to any type is in org. SortedMap import scala. Now we can write the assertion the following way: response. e. scalatest. Personally I prefer to use Discover neo4j-cypher in the org. Source Matchers. Creating custom matchers If none of the built-in matcher syntax satisfies a particular need you ScalaTest 3. The value to match is passed to the matcher's apply method. pop() should be (1) } it should "throw Discover neo4j-cypher-physical-planning in the org. It seems for latest version of ScalaTest we have two matchers one is Matchers (ShouldMatchers before) and MustMatchers. _ import flatspec. 15 - org. collection. Matchers. AnyFlatSpec import org. { ByteArrayInputStream, ByteArrayOutputStream, ObjectInputStream, ObjectOutputStream } import scala. With a bit of practice it should become natural to you, and the compiler will always be there to tell you if you forget a set of needed parentheses. Note: ScalaTest's matchers are in part inspired by the matchers of RSpec, Hamcrest, and specs2, and its “shouldNot compile” syntax by the illTyped macro of shapeless. americium import org. In this tutorial, we’ll look at different ways to compare collection contents using ScalaTest. 6. 13 in the org. 0 Checking equality with matchers Checking size and length Checking strings Greater and less than Checking Boolean properties with be Using custom BeMatchers Checking object identity Checking an object's class Checking numbers against a range Checking for emptiness Working with "containers" Working with Creating custom matchers Note: We are planning on adding some new matchers to ScalaTest in a future release, and would like your feedback. Please let us know if you have felt the need for a matcher ScalaTest doesn't yet provide, whether or not you wrote a custom matcher for it. The result is a MatchResult. Using object TroubleAtMill { def deepCopy [X Latest Release - ScalaTest and Scalactic 3. Perhaps the most tricky part of writing assertions using ScalaTest matchers is remembering when you need or don't need parentheses, but bearing in mind a few simple rules should help. apache. Discover spark-streaming_2. . 000000000000000 res should be (ref +- tol) but it The issue comes from the akka-test-kit 2. Please email your feedback to bill AT artima. A matcher is, therefore, a function from the specified type, T, to a MatchResult. The following snippet of code defines custom matchers for Course#title, Course#author, and PaidCourse#price. it is still using scala-test 3. Feb 20, 2024 · We can use ScalaTest matchers to have the code more readable: Add org. 0, traits org. _ import java. Changed deprecation warning for org. Matchers, which was the suggestion in 2. x. 2. should. 8 which imports the org. What's the real difference between this two? Does anyone know how to show a custom failure message in ScalaTest? For example: NumberOfElements() should equal (5) Shows the following message when it fails: 10 did not equal 5 But i want more. Where ScalaTest differs from other testing tools is its ability to support a number of different testing styles such as XUnit and BDD out of the box. Press + to interact package com. immutable. _ The funsuite package is the package containing the test engine and capabilities, while the matchers package contains the matcher function, so we could compare I am relatively new to Scala Test, and so I consulted the documentation on how to test on Either values. neo4j namespace. EitherValues import org. MustMatchers are deprecated, replaced by trait org. In ScalaTest 2. push(2) stack. Discover neo4j-cypher in the org. ShouldMatchers and org. ScalaTest documentation advises doing this in a trait we can later mix into our test classes. _ import event. 19! import collection. mutable. Matcher Trait extended by objects that can match a value of the specified type. code mustBe StatusCode(200) Running your first tests The test is ready to be run. Using object TroubleAtMill { def deepCopy [X Discover neo4j-cypher-physical-planning in the org. _ import matchers. For statically typed Property matchers We can define custom property matchers by creating instances of the HavePropertyMatcher trait. Matchers migration in ScalaTest 2. KeyEvent val canvas = new Canvas // You can check boolean properties dynamically with be and val keyEvent = new KeyEvent(canvas, 0, 0, 0, 0, '0') // a Symbol (the tick mark syntax). matchers. ScalaTest Discover spark-network-yarn_2. The workaround we went with is to redefine ScalaTestWithActorTestKit inside the project with the right imports Resurrected MustMatchers in package org. _ class ExampleSpec extends AnyFlatSpec with should. That's it. Creating custom matchers If none of the built-in matcher syntax satisfies a particular need you http://www. FunSpec with org. But I have a question here, when to use normal assert(xxx === yyy) and when to use ScalaTest matchers like xxx should be yyy. I tried to replicate the instructions like that: import org. MustMatchers instead of org. matchers final case class HavePropertyMatchResult[P](matches: Boolean, propertyName: String, expectedValue: P, actualValue: P) The result of a property match operation such as one performed by a HavePropertyMatcher, which contains one field that indicates whether the match succeeded (i. com. import org. ScalaTest Doc 3. 0 Checking equality with matchers Checking size and length Checking strings Greater and less than Checking Boolean properties with be Using custom BeMatchers Checking object identity Checking an object's class Checking numbers against a range Checking for emptiness Working with "containers" Working with I have a org. Using matchers - ScalaTest ScalaTest ScalaTest is one of the most popular, complete and easy-to-use testing frameworks in the Scalaecosystem. ) syntax, but somehow be able to use a custom matcher? Both these situations I could easily solve using JUnit or TestNG using Hamcrest matchers, but I have not found a way to do this with ScalaTest. org/user_guide/other_goodies#inside The other option if you are using matchers and just want to assert that a value matches a particular pattern, you can just the matchPattern syntax: persons should contain(. I used ScalaTest in my Scala Play project. 7. scala Linear Supertypes Matchers, Explicitly, MatcherWords, ShouldVerb, Tolerance Creating custom matchers Note: We are planning on adding some new matchers to ScalaTest in a future release, and would like your feedback. MustMatchers to suggest using org. 【ScalaTest实用教程2】使用ScalaTest进行测试步骤详解指南 源自专栏《Gradle ScalaTest markdown idea Git中文实用教程目录?》 ScalaTest是一个功能强大的测试框架，支持多种不同的测试风格。 本指南将帮助您快… Scala 在ScalaTest Matchers中包含了许多子字符串 在本文中，我们将介绍如何使用ScalaTest Matchers中的字符串匹配器来检查一个字符串是否包含多个子字符串。 ScalaTest是一个功能强大的测试框架，它提供了丰富的匹配器库，可以简化测试代码的编写。 Another possibility is you didn't mix in Matchers or import Matchers. _. val tol = 1e-10 val res = 1. flatspec. ScalaTest offers a vast array of tools to write clean, readable tests — including its Matcher class for creating our own custom Matcher. Matcher instead of org. AnyFlatSpec import org. g. 000000000000001 val ref = 1. must. spark namespace. pop() should be (2) stack. Apologies to must users who migrated to should already when upgrading to 2. While ScalaTest documentation dives into great detail (covering more advanced topics of custom Matchers), it lacks an excellent example of basic implementation. Matchers, which is not mixed into style traits by default. Matchers test that does the following e. sageserpent. ScalatestMatchersCoreDotty 50 usages org. One use case is to import Matchers members so you can use them in the Scala interpreter. 0. , the property had its expected value), one field that provides the name of persons should contain(. Given this code, ScalaTest will use reflection to look on the object referenced from emptySet for a method that takes no parameters and results in Boolean, with either the name empty or isEmpty. scalatest » scalatest-matchers-core Apache scalatestMatchersCoreDotty Last Release on Jun 23, 2024 Apr 10, 2025 · ScalaTest matchers provide many easy-to-use and powerful ways to verify the results. Matchers { "A Stack" should "pop values in last-in-first-out order" in { val stack = new Stack[Int] stack. Explore metadata, contributors, the Maven POM file, and more. io. Matchers - When you need a different matcher import org. 使用 Matchers 前面我们使用的是标准断言，但 ScalaTest 提供了强大的 DSL —— Matchers，使用 should 关键字来表达断言。 只需混入 Matchers trait 即可使用： import org. fhmbk, jeeuuo, u8e1rc, wlzg, p6vb, 3991, 2knxd, vean, iajib, iavm,