FakeItEasy.Capture 1.0.0-alpha

FakeItEasy.Capture

Capturing arguments sent to a fake. Supports .NET Core (.NET Standard 1.6+)

Installation

PM> Install-Package FakeItEasy.Capture

Usage

Capture single invocation

// Capturing a single argument
var singleArgument = new Capture<string>();
var dependency = A.Fake<SomeDependency>();
A.CallTo(() => dependency.SomeMethod(singleArgument)).DoesNothing();

dependency.SomeMethod("I am captured!");

Console.WriteLine(singleArgument.Value == "I am captured!");

dependency.SomeMethod("I am captured!");

Capture multiple invocations

// Capturing multiple arguments
var multipleArguments = new Capture<string>();
var dependency = A.Fake<SomeDependency>();
A.CallTo(() => dependency.SomeMethod(multipleArguments)).DoesNothing();

dependency.SomeMethod("I am captured!");
dependency.SomeMethod("I, too, am captured!");
dependency.SomeMethod("I am also captured!");

Console.WriteLine(multipleArguments.Values.Count == 3);

Caveats

The Capture instance can only be used to configure a single call.

Example

// Capturing multiple arguments - in multiple passes
var singleArgument = new Capture<string>();
var dependency = A.Fake<IDependency>();
A.CallTo(() => dependency.SomeMethod(singleArgument)).DoesNothing();
A.CallTo(() => dependency.SomeOtherMethod(singleArgument)).DoesNothing(); // This fails