ASP.NET Core .NET Core Unit Test xUnit.net
▌Introduction
One of the
MOST IMPORTANT parts on the way to happy coding: Unit Test!
Let us see how
to use xUnit.net in .NET Core.
▌Environment
▋Visual Studio 2015
Update 3
▋.Net Core 1.0.0
▋xunit 2.1.0
▋dotnet-test-xunit 1.0.0-rc2
▌Implement
▋Create a new .NET Core Class Library project
▋Install packages
▋Create a simple unit test
|
public class UnitTestDemo
{
[Fact]
public void TestSplitCount()
{
var input = "Luke Skywalker, Leia Skywalker, Anakin Skywalker";
var actual = input.Split(',').Count();
Assert.True(actual.Equals(3),
$"Expected:3, Actual:{actual}");
}
}
|
Build the unit test project, and we can see that the unit
test is on the Test Explorer.
Or use the following command to run all tests.
dotnet test
Or a single one
dotnet test -method Angular2.Mvc.xUnitTest.UnitTestDemo.TestSplitCount
▋Use [Theory] to test multiple cases(data)
Here is a sample,
|
[Theory]
[InlineData("A,B,C")]
[InlineData("AA,BB,CC")]
[InlineData("1,2,3")]
[InlineData("#,^,*")]
public void
TestSplitCountComplexInput(string input)
{
var actual = input.Split(',').Count();
Assert.True(actual.Equals(3),
$"Expected:3, Actual:{actual}");
}
|
Test result:
▋Use [Theory] and [MemberData] to test with expected
values
We will refactor the previous unit test and let every
test has its own expected value.
First, create a TestCase class with test cases,
▋Testcase.cs
|
public class TestCase
{
public static readonly List<object[]> Data = new List<object[]>
{
new object[]{"A,B,C",3}, //The last value is the expected value
new object[]{"AA,BB,CC,DD",4},
new object[]{"1,2,3,4,5",5},
new object[]{"(,&,*,#,!,?",6}
};
public static IEnumerable<object[]> TestCaseIndex
{
get
{
List<object[]> tmp = new List<object[]>();
for (int i = 0; i <
Data.Count; i++)
tmp.Add(new object[] { i });
return tmp;
}
}
}
|
▋Unit test
|
[Theory]
[MemberData("TestCaseIndex", MemberType = typeof(TestCase))]
public void
TestSplitCountComplexInput(int index)
{
var input = TestCase.Data[index];
var value = (string)input[0];
var expected = (int)input[1];
var actual = value.Split(',').Count();
Assert.True(actual.Equals(expected),
$"Expected:{expected}, Actual:{actual}");
}
|
▋Result
▋Whaz next?
We will talk about MSTest
and decoupling with NSubstitute in
the next day-sharing.
▌Reference
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