Some users prefer a shorter form of assertion than is given by
NUnit's Assert.That. If you statically import NUnit.StaticExpect,
the Expect() method may be used instead...
- Install the nuget package (
install-package nunit.staticexpect) - Import the static methods: add the following using statement to your test class file:
// C#
using static NUnit.StaticExpect.Expectations;
' VB
Imports NUnit.StaticExpect.Expectations
- Use the Expect() syntax:
[Test]
public void Expect_True_IsTrue()
{
Expect(bool condition);
Expect(bool condition, string message, params object[] parms);
Expect(ActualValueDelegate del, IResolveConstraint constraint)
Expect(ActualValueDelegate del, IResolveConstraint constraint,
string message, params object[] parms)
Expect<TActual>(TActual actual, IResolveConstraint constraint)
Expect<TActual>(TActual actual, IResolveConstraint constraint,
string message, params object[] parms)
Expect(TestDelegate del, IResolveConstraint constraint);
}
In addition, NUnit.StaticExpect allows the test fixture where the static
import has been done to make direct use of many of the syntactic elements
that would normally require you to specify the Is, Has or Does
classes in order to use them. For example, you can write...
Expect(actual, EqualTo("Hello"));
NUnit.StaticExpect depends on NUnit -- indeed, installing the
NUnit.StaticExpect package should also install the relevant NUnit package
if not already installed. As such, all NUnit syntax is available, including
Assert.Warn and Assume.That. Most of NUnit.StaticExpects methods and
properties are simply pass-through shims to the relevant NUnit ones.
NUnit has historically had a class named AssertionHelper which your
test fixtures could inherit to provide the above syntax. NUnit issue #1212 discusses the
deprecation of AssertionHelper.
Personally, I had been using AssertionHelper
for about 6 months before I saw it marked as deprecated after an NUnit upgrade.
NUnit.StaticExpect has been made to provide the same functionality for anyone
who doesn't want to retrofit existing tests to use the newer Assert.That
syntax or for anyone who just plain prefers the Expect() syntax.
NUnit.StaticExpect has a suite of tests to prove parity with AssertionHelper.
Still, the contributors are only human, so we may have missed something.
If this library is missing something you're used to from AssertionHelper, log an
issue (: Pull requests are also welcome.