[英]Moq: Change Setup Returns Generic method to deal with Asynchronous Parameter
I have a Moq setup statement that looks like this with a conditional/generic Returns statement based on the enum value passed in:我有一个起订量设置语句,看起来像这样,带有一个基于传入枚举值的条件/通用 Returns 语句:
MyLogic.Setup(m => m.MyLogicMethod(It.IsAny<MyEnum>()))
.Returns<MyEnum>((x) =>
{
switch (x)
{
case MyEnum.Enum1: return "stringval1";
case MyEnum.Enum2: return "stringval2";
case MyEnum.Enum3: return "stringval3";
case MyEnum.Enum4: return "stringval4";
case MyEnum.Enum5: return "stringval5";
default: return string.Empty;
}
});
I have now changed the method being tested to be async (returning Task<string>
).我现在已将正在测试的方法更改为异步(返回Task<string>
)。 Moq does not offer a generic ReturnsAsync, so how can I change the above Setup statement to work with an asynchronous method? Moq 不提供通用 ReturnsAsync,那么如何更改上述 Setup 语句以使用异步方法?
MyLogic.Setup(m => m.MyLogicMethodAsync(It.IsAny<MyEnum>()))
.Returns????
You don't have to use ReturnAsync
, you can keep your return method, just return a Task<>
.您不必使用ReturnAsync
,您可以保留您的返回方法,只需返回一个Task<>
。
MyLogic.Setup(m => m.MyLogicMethod(It.IsAny<MyEnum>()))
.Returns<MyEnum>((x) =>
{
string returnValue = null;
switch (x)
{
case MyEnum.Enum1: returnValue = "stringval1";
case MyEnum.Enum2: returnValue = "stringval2";
case MyEnum.Enum3: returnValue = "stringval3";
case MyEnum.Enum4: returnValue = "stringval4";
case MyEnum.Enum5: returnValue = "stringval5";
default: returnValue = string.Empty;
}
return Task.FromResult(returnValue);
});
Moq does not offer a generic ReturnsAsync, Moq 不提供通用 ReturnsAsync,
Moq does offer a generic ReturnsAsync
. Moq 确实提供了一个通用的ReturnsAsync
。
//
// Summary:
// Specifies a function that will calculate the value to return from the asynchronous
// method.
//
// Parameters:
// mock:
// Returns verb which represents the mocked type and the task of return type
//
// valueFunction:
// The function that will calculate the return value.
//
// Type parameters:
// TMock:
// Mocked type.
//
// TResult:
// Type of the return value.
public static IReturnsResult<TMock> ReturnsAsync<TMock, TResult>(this IReturns<TMock, Task<TResult>> mock, Func<TResult> valueFunction) where TMock : class;
Assembly Moq, Version = 4.15.0.0最小起订量,版本 = 4.15.0.0
Move your generic argument into the delegate so that the it can be implied by the generic method.将您的泛型参数移动到委托中,以便泛型方法可以隐含它。
MyLogic
.Setup(m => m.MyLogicMethodAsync(It.IsAny<MyEnum>()))
.ReturnsAsync((MyEnum x) => {
switch (x) {
case MyEnum.Enum1: return "stringval1";
case MyEnum.Enum2: return "stringval2";
case MyEnum.Enum3: return "stringval3";
case MyEnum.Enum4: return "stringval4";
case MyEnum.Enum5: return "stringval5";
default: return string.Empty;
}
});
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