FakeItEasy Analyzers
FakeItEasy provides Roslyn analyzer packages to detect incorrect usages of the library that cannot be prevented by the API or the compiler but will typically result in bugs at runtime.
Installation
The packages work in Visual Studio 2017 version 15.9 or later. Install one of these NuGet packages in each project that needs it:
- For C# projects: FakeItEasy.Analyzer.CSharp
- For VB.NET projects: FakeItEasy.Analyzer.VisualBasic
Diagnostics
Each analyzer package provides the following diagnostics:
| Id | Summary | Code Fix? | Description |
|---|---|---|---|
| FakeItEasy0001 | Unused call specification | no | Triggered when you specify a call but don't configure or assert it, making it a no-op. |
| FakeItEasy0002 | Non-virtual member configuration | no | Triggered when you try to configure a non-virtual member, which cannot be faked. |
| FakeItEasy0003 | Argument constraint outside call spec | no | Triggered when you try to use an argument constraint outside of a call specification. |
| FakeItEasy0004 | Argument constraint nullability mismatch | yes | Triggered when you use a non-nullable argument constraint for a nullable parameter. Calls where the argument is null won't be matched. If this is intentional, consider using A<T?>.That.IsNotNull() instead. If it's not, make the argument constraint nullable (A<T?>). |
| FakeItEasy0005 | Argument constraint type mismatch | yes | Triggered when you use an argument constraint whose type doesn't match the parameter. No such calls can be matched. |
MustHaveHappened(Repeated) overload. |