This project is a simple library to wrap the NUnit (extensible to MSTest) assertion libraries in order to provide an expressive API for declaring unit-test assertions.
When I made this library, there was only 1 other option, which I did not like, because it lacked flexible assertions for IEnumerable objects and methods. So I created this one, it has grown a bit through time. It still needs more tests, but is quite complete and can be used in any assertion scenario.
- It provides fluent assertions over:
- Strings
- Numbers
- Arrays
- Enumerables
- Objects
- Action<T,T1,T2...T15>
- Func<T1,T1,T2...T15>
- It can be used to define to check for thrown Exceptions.
- It includes some functions like: Get file from current directory
- If you have ever tried to read a data file from the current testing directory, you understand what I mean.
- You can assert over the Properties of an object under test, not just the object itself.
This tool is provided as a NuGet package, search for it using the name: [Testing Tools] (https://nuget.org/packages/TestingTools/)
You can also install it from the command line: c:\project\dir\path> nuget install NVerify
TODO: Add example usage of every feature.
This tool is meant to be used in the Arrange/Act/Assert pattern, like in the following example:
using NVerify;
using NUnit.Framework;
[Fixture]
public class CalculatorTest
{
[Test]
public void TestCalculatorSum()
{
// Arrange
Calculator target = new Calculator();
int expected = 4;
int result;
// Act
result = target.Sum(2, 2);
// Assert: Should Pass
Verify.That(result)
.IsEqualTo(expected);
.Now();
}
[Test]
public void TestCalculatorSum2()
{
// Arrange
Calculator target = new Calculator();
int result;
// Act
result = target.Sum(2, 2);
// Assert: Should Pass
Verify.That(result)
.IsLessThan(5)
.And()
.IsGreaterThan(3)
.Now();
}
[Test]
public void TestThrowsException()
{
// Arrange
var target = new Calculator();
int result;
// Act
var act = () => target.Sum(Int.MaxValue, 1);
// Assert: Should Pass
Verify.That(act).ThrowsException().Now();
}
[Test]
public void TestArrayElements()
{
// Arrange
var array = new int[] { 2, 3, 4 };
// Assert: Should Pass
Verify.That(array).DoesContain(2)
.Now();
Verify.That(array).DoesNotContain(1)
.Now();
}
[Test]
public void TestConsoleOutput()
{
// Arrange
string expected = "Hello World!";
// Act
Action act = () => Console.Write("@Hello World!");
// Assert: Should Pass
Verify.That(act).WritesToConsole(expected)
.Now();
}
[Test]
public void TestExactConsoleOutput()
{
// Arrange
string notExpected = "Hello World!";
// Act
Action act = () => Console.Write("@Hello World!");
// Assert: Should Pass
Verify.That(act)
.DoesntWriteExactlyToConsole(notExpected)
.Now();
}
}
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