ScalaTest in sbt is there a way to run a single test without tags

Question

I know that a single test can be ran by running  in sbt    testOnly  class -- -n Tag   Is there a way of telling sbt scalatest to run a single test without tags  For example   testOnly  class -- -X 2   it would mean  run the second test in the class  Whatever it is   We have a bunch of tests and no one bothered to tag them  so is there a way to run a single test without it having a tag

User · Answer

Just to simplify the example of Tyler   test -prefix is not needed   So according to his example   In the sbt-console   testOnly  LoginServiceSpec   And in the terminal   sbt  testOnly  LoginServiceSpec

User · Answer

Here s the Scalatest page on using the runner and the extended discussion on the -t and -z options  This post shows what commands work for a test file that uses FunSpec  Here s the test file  package com github mrpowers scalatest example  import org scalatest FunSpec  class CardiBSpec extends FunSpec      describe  quot realName quot          it  quot returns her birth name quot           assert CardiB realName        quot Belcalis Almanzar quot                 describe  quot iLike quot          it  quot works with a single argument quot           assert CardiB iLike  quot dollars quot        quot I like dollars quot              it  quot works with multiple arguments quot           assert CardiB iLike  quot dollars quot    quot diamonds quot        quot I like dollars  diamonds quot              it  quot throws an error if an integer argument is supplied quot           assertThrows java lang IllegalArgumentException           CardiB iLike                      it  quot does not compile with integer arguments quot           assertDoesNotCompile  quot  quot  quot CardiB iLike 1  2  3  quot  quot  quot                  This command runs the four tests in the iLike describe block  from the SBT command line   testOnly  CardiBSpec -- -z iLike  You can also use quotation marks  so this will also work  testOnly  CardiBSpec -- -z  quot iLike quot   This will run a single test  testOnly  CardiBSpec -- -z  quot works with multiple arguments quot   This will run the two tests that start with  quot works with quot   testOnly  CardiBSpec -- -z  quot works with quot   I can t get the -t option to run any tests in the CardiBSpec file   This command doesn t run any tests  testOnly  CardiBSpec -- -t  quot works with multiple arguments quot   Looks like the -t option works when tests aren t nested in describe blocks   Let s take a look at another test file  class CalculatorSpec extends FunSpec     it  quot adds two numbers quot         assert Calculator addNumbers 3  4      7         -t can be used to run the single test  testOnly  CalculatorSpec -- -t  quot adds two numbers quot   -z can also be used to run the single test  testOnly  CalculatorSpec -- -z  quot adds two numbers quot   See this repo if you d like to run these examples   You can find more info on running tests here

User · Answer

I don t see a way to run a single untagged test within a test class but I am providing my workflow since it seems to be useful for anyone who runs into this question   From within a sbt session   test testOnly  YourTestClass    The asterisk is a wildcard  you could specify the full path com example specs YourTestClass    All tests within that test class will be executed  Presumably you re most concerned with failing tests  so correct any failing implementations and then run   test testQuick       which will only execute tests that failed   Repeating the most recently executed test testOnly command will be the same as test testQuick in this case  but if you break up your test methods into appropriate test classes you can use a wildcard to make test testQuick a more efficient way to re-run failing tests    Note that the nomenclature for test in ScalaTest is a test class  not a specific test method  so all untagged methods are executed   If you have too many test methods in a test class break them up into separate classes or tag them appropriately   This could be a signal that the class under test is in violation of single responsibility principle and could use a refactoring

User · Answer

I wanted to add a concrete example to accompany the other answers  You need to specify the name of the class that you want to test  so if you have the following project  this is a Play project      You can test just the Login tests by running the following command from the SBT console   test testOnly  LoginServiceSpec   If you are running the command from outside the SBT console  you would do the following   sbt  test testOnly  LoginServiceSpec

User · Answer

This is now supported  since ScalaTest 2 1 3  within interactive mode    testOnly  MySuite -- -z foo   to run only the tests whose name includes the substring  foo    For exact match rather than substring  use -t instead of -z

[scala] ScalaTest in sbt: is there a way to run a single test without tags?

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