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MockingContainer
测试类准备：一般来说也是业务类
public class ClassUnderTest
{
private IFirstDependency firstDep;
private ISecondDependency secondDep; public ClassUnderTest(IFirstDependency first, ISecondDependency second)
{
this.firstDep = first;
this.secondDep = second;
} public IList<object> CollectionMethod()
{
var firstCollection = firstDep.GetList(); return firstCollection;
} public string StringMethod()
{
var secondString = secondDep.GetString(); return secondString;
}
} public interface IFirstDependency
{
IList<object> GetList();
} public interface ISecondDependency
{
string GetString();
}
单元测试
[TestMethod]
public void ShouldMockDependenciesWithContainer()
{
// ARRANGE
// Creating a MockingContainer of ClassUnderTest.
// To instantiate the system uder test (the container) you should use the Instance property
// For example: container.Instance.
var container = new MockingContainer<ClassUnderTest>(); string expectedString = "Test"; // Arranging: When the GetString() method from the ISecondDependecy interface
// is called from the container, it should return expectedString.
container.Arrange<ISecondDependency>(
secondDep => secondDep.GetString()).Returns(expectedString); // ACT - Calling SringMethod() from the mocked instance of ClassUnderTest
var actualString = container.Instance.StringMethod(); // ASSERT
Assert.AreEqual(expectedString, actualString);
}
需要说明的是MockingContainer构造函数有一个可选参数AutoMockSettings，其中AutoMockSettings最主要的一个作用的是当ClassUnderTest有多个构造函数时，指定合适的构造函数来实例化对象
当业务类中有一个无参构造函数，一个有参构造函数，在没有设置AutoMockSettings的情况下会默认执行无参构造函数，
可以像下面这样来指定需要的构造函数
AutoMockSettings settings = new AutoMockSettings
{
ConstructorArgTypes = new Type[]{
typeof(IFirstDependency),typeof(ISecondDependency)
}
}; // ARRANGE
// Creating a MockingContainer of ClassUnderTest.
// To instantiate the system uder test (the container) you should use the Instance property
// For example: container.Instance.
var container = new MockingContainer<ClassUnderTest>(settings);