Breaking Changes

NUnit 3.4

Breaking changes introduced in NUnit 3.4

• The --teamcity comsole command-line option now requires the TeamCityEventListener extension to be intalled. This only affects users who install the extensions individually or copy them to another directory. If you install using the Windows installer or the NUnit.Console NuGet package the TeamCity extension is included.

• String arguments in the names of test cases are no longer truncated to 40 characters.

• The .NET 2.0 build of the nunit framework uses a private implementation of System.Linq. NUnit installs the NUnit.System.Linq assembly alongside the nunit.framework assembly. If you copy the framework to another location, you must ensure that both are copied. The extra assembly is not used in other builds because System.Linq is already supported in those environments.

NUnit 3.0

A relatively large number of features present in NUnit 2.6, were either removed in NUnit 3.0 or had their behavior modified in a way that will break existing code.

A key change is that the NUnit Test Engine will not recognize a test assembly that does not reference the NUnit framework directly. Normally, test assemblies use NUnit Asserts, attributes and other Types and methods. However, certain third-party frameworks are designed to completely isolate the user from the details of NUnit. They mediate between the test assembly and the NUnit framework in order to run tests. In such a case, NUnit will indicate that the assembly either contains no tests or the proper driver could not be found. To resolve this situation, simply add one NUnit attribute or other reference. An assembly-level ParallelizableAttribute is useful for this purpose.

Other breaking changes are grouped in the following tables.

######Attributes

Name	Notes
ExpectedExceptionAttribute	No longer supported. Use Assert.Throws or Assert.That.
IgnoreAttribute	The reason is now mandatory
RequiredAddinAttribute	No longer supported.
RequiresMTAAttribute	Deprecated. Use ApartmentAttribute
RequiresSTAAttribute	Deprecated. Use ApartmentAttribute
SuiteAttribute	No longer supported.
System.MTAThreadAttribute	No longer treated as RequiresMTAAttribute
System.STAThreadAttribute	No longer treated as RequiresSTAAttribute
TearDown and OneTimeTearDown	There is a change to the logic by which teardown methods are called. See SetUp and TearDown Changes for details.
TestCaseAttribute	Named parameter Result= is no longer supported. Use ExpectedResult=. Named parameter Ignore= now takes a string, giving the reason for ignoring the test.
TestCaseSourceAttribute	The attribute forms using a string argument to refer to the data source must now use only static fields, properties or methods.
TestFixtureAttribute	Named parameter Ignore= now takes a string, giving the reason for ignoring the test.
TestFixtureSetUpAttribute	Deprecated. Use OneTimeSetUpAttribute.
TestFixtureTearDownAttribute	Deprecated. Use OneTimeTearDownAttribute.
ValueSourceAttribute	The source name of the data source must now use only static fields, properties or methods.

######Assertions and Constraints

Feature	Notes
Assert.IsNullOrEmpty	No longer supported. Use Assert.That(..., Is.Null.Or.Empty)
Assert.IsNotNullOrEmpty	No longer supported. Use Assert.That(..., Is.Not.Null.And.Not.Empty)
Is.InstanceOfType	No longer supported. Use Is.InstanceOf
Is.StringStarting	Deprecated. Use Does.StartWith
Is.StringContaining	Deprecated. Use Does.Contain
Is.StringEnding	Deprecated. Use Does.EndWith
Is.StringMatching	Deprecated. Use Does.Match
NullOrEmptyStringConstraint	No longer supported. See Assert.IsNullOrEmpty above
SubDirectoryContainsConstraint	No longer supported. Various alternatives are available.
Text.All	No longer supported. Use Does.All
Text.Contains	No longer supported. Use Does.Contain or Contains.Substring
Text.DoesNotContain	No longer supported. Use Does.Not.Contain
Text.StartsWith	No longer supported. Use Does.StartWith
Text.DoesNotStartWith	No longer supported. Use Does.Not.StartWith
Text.EndsWith	No longer supported. Use Does.EndWith
Text.DoesNotEndWith	No longer supported. Use Does.Not.EndWith
Text.Matches	No longer supported. Use Does.Match
Text.DoesNotMatch	No longer supported. Use Does.Not.Match

######Other Framework Features

Feature	Notes
Addins	No longer supported. See Addin Replacement in the Framework.
CurrentDirectory	No longer set to the directory containing the test assembly. Use TestContext.CurrentContext.TestDirectory to locate that directory.
NUnitLite	NUnitLite executable tests must now reference nunit.framework in addition to nunitlite.
SetUpFixture	Now uses OneTimeSetUpAttribute and OneTimeTearDownAttribute to designate higher-level setup and teardown methods. SetUpAttribute and TearDownAttribute are no longer allowed.
TestCaseData	The Throws Named Property is no longer available. Use Assert.Throws or Assert.That in your test case.
TestContext	The fields available in the TestContext have changed, although the same information remains available as for NUnit V2.

######Console Features

The console runner is now called nunit3-console. The following breaking changes apply to the options that the new runner supports.

Option	Function	Notes
--fixture=STR	Test fixture or namespace to be loaded	No longer supported. Use --test instead.
--run=STR	List of tests to run	No longer supported. Replaced by --test.
--runlist=PATH	File containing list of tests to run	No longer supported. Replaced by --testlist.
--include=LIST	List of categories to include	No longer supported. Use --where instead.
--exclude=LIST	List of categories to exclude	No longer supported. Use --where instead.
--process=PROCESS	ProcessModel for test assemblies	Default value is now Separate for a single assembly, Multiple for more than one. Multiple assemblies run in parallel by default.
--domain=DOMAIN	DomainUsage for test assemblies	Default value is now Separate for a single assembly, Multiple for more than one.
--apartment=APT	Apartment in which to run tests	No longer supported. Use ApartmentAttribute.
--xmlconsole	Display XML to the console	No longer supported.
--basepath	Set ApplicationBase for execution	No longer supported.
--privatebinpath	Specify probing path for execution	No longer supported.
--cleanup	Remove left-over cache files	No longer supported.
--noshadow	Disable shadow copy	No longer supported. The console runner now disables shadow copy by default. use --shadowcopy on the command-line to turn it on.
--nothread	Disable use of a separate thread for tests	No longer supported.
--nodots	Do not display dots as a progress indicator	No longer supported.