Project Description

The Should Assertion Library provides a set of extension methods for test assertions for AAA and BDD style tests. It provides assertions only, and as a result it is Test runner agnostic. The assertions are a direct fork of the xUnit test assertions. This project was born because test runners Should be independent of the the assertions!

PM> install-package should

The following example shows some of the the assertions that are available for objects, booleans, string, and collections.
public void Should_assertions()
{
    object obj = null;
    obj.ShouldBeNull();

    obj = new object();
    obj.ShouldBeType(typeof(object));
    obj.ShouldEqual(obj);
    obj.ShouldNotBeNull();
    obj.ShouldNotBeSameAs(new object());
    obj.ShouldNotBeType(typeof(string));
    obj.ShouldNotEqual("foo");

    obj = "x";
    obj.ShouldNotBeInRange("y", "z");
    obj.ShouldBeInRange("a", "z");
    obj.ShouldBeSameAs("x");

    "This String".ShouldContain("This");
    "This String".ShouldNotBeEmpty();
    "This String".ShouldNotContain("foobar");

    false.ShouldBeFalse();
    true.ShouldBeTrue();

    var list = new List<object>();
    list.ShouldBeEmpty();
    list.ShouldNotContain(new object());

    var item = new object();
    list.Add(item);
    list.ShouldNotBeEmpty();
    list.ShouldContain(item);
}

Should also provides a fluent API. Here are the same assertions as above using the fluent API. Should.Fluent is a direct port of ShouldIt.
public void Should_fluent_assertions()
{
    object obj = null;
    obj.Should().Be.Null();

    obj = new object();
    obj.Should().Be.OfType(typeof(object));
    obj.Should().Equal(obj);
    obj.Should().Not.Be.Null();
    obj.Should().Not.Be.SameAs(new object());
    obj.Should().Not.Be.OfType<string>();
    obj.Should().Not.Equal("foo");

    obj = "x";
    obj.Should().Not.Be.InRange("y", "z");
    obj.Should().Be.InRange("a", "z");
    obj.Should().Be.SameAs("x");

    "This String".Should().Contain("This");
    "This String".Should().Not.Be.Empty();
    "This String".Should().Not.Contain("foobar");

    false.Should().Be.False();
    true.Should().Be.True();

    var list = new List<object>();
    list.Should().Count.Zero();
    list.Should().Not.Contain.Item(new object());

    var item = new object();
    list.Add(item);
    list.Should().Not.Be.Empty();
    list.Should().Contain.Item(item);
};

Here are some additional examples of assertions using the fluent API:
public void Should_fluent_assertions()
{
    var numbers = new List<int> { 1, 1, 2, 3 };
    numbers.Should().Contain.Any(x => x == 1);
    numbers
        .Should().Count.AtLeast(1)
        .Should().Count.NoMoreThan(5)
        .Should().Count.Exactly(4)
        .Should().Contain.One(x => x > 2);

    var id = new Guid();
    id.Should().Be.Empty();

    id = Guid.NewGuid();
    id.Should().Not.Be.Empty();

    var date = DateTime.Now;
    date1.Should().Be.Today();

    var str = "";
    str.Should().Be.NullOrEmpty();                

    var one = "1";
    one.Should().Be.ConvertableTo<int>();

    var idString = Guid.NewGuid().ToString();
    idString.Should().Be.ConvertableTo<Guid>();
}

Last edited May 22, 2012 at 2:01 PM by erichexter, version 10