@MainActor protocol generates mock that doesn't compile

[onelittlefish]

New Issue Checklist

• [x] I updated the framework and generator to the latest version
• [x] I searched the existing GitHub issues and list of common problems

Overview

If a protocol is annotated with @MainActor, the generated mock is not main actor-isolated and doesn't compile.

Example

Source:

@MainActor
protocol MyProtocol {
    func foo()
}

Generated:

public func mock(_ type: Example.MyProtocol.Protocol, file: StaticString = #file, line: UInt = #line) -> MyProtocolMock {
    return MyProtocolMock(sourceLocation: Mockingbird.SourceLocation(file, line))
}

The generated code results in a compile error:

Call to main actor-isolated initializer 'init(sourceLocation:)' in a synchronous nonisolated context

Expected Behavior

I think the generated mock() function needs to be @MainActor.

Environment

• Mockingbird CLI version (0.20.0)
• Xcode and Swift version (swift --version)
• Package manager (SPM project)
• Unit testing framework (XCTest)
• Custom configuration
  • [ ] Mockingbird ignore files
  • [ ] Supporting source files

[vvorlov]

@onelittlefish any solution to this?