Add fix-it handling tests for macro examples

Matejkob · Matejkob · commit 6412ec75bf61 · 2023-11-16T20:25:44.000+01:00
It introduces an enhancement to our macro expansion functionality with the addition of fix-it tests.

In `AddBlockerTests`, a new test case has been added to validate the scenario where an addition operation should be a subtraction, including a diagnostic message and the application of the suggested fix-it.

Similarly, `AddCompletionHandlerMacroTests` is now equipped with a test case that applies a fix-it for adding the 'async' keyword to functions that are missing it but have the `@AddCompletionHandler` attribute.
diff --git a/Examples/Sources/MacroExamples/Implementation/Peer/AddCompletionHandlerMacro.swift b/Examples/Sources/MacroExamples/Implementation/Peer/AddCompletionHandlerMacro.swift
@@ -38,6 +38,7 @@ public struct AddCompletionHandlerMacro: PeerMacro {
       } else {
         newEffects = FunctionEffectSpecifiersSyntax(asyncSpecifier: .keyword(.async, trailingTrivia: .space))
       }
+      newEffects.asyncSpecifier?.trailingTrivia = [.spaces(1)]
 
       var newSignature = funcDecl.signature
       newSignature.effectSpecifiers = newEffects

Original file line number	Diff line number	Diff line change
`@@ -38,6 +38,7 @@ public struct AddCompletionHandlerMacro: PeerMacro {`
`38`	`38`	`} else {`
`39`	`39`	`newEffects = FunctionEffectSpecifiersSyntax(asyncSpecifier: .keyword(.async, trailingTrivia: .space))`
`40`	`40`	`}`
	`41`	`+ newEffects.asyncSpecifier?.trailingTrivia = [.spaces(1)]`
`41`	`42`
`42`	`43`	`var newSignature = funcDecl.signature`
`43`	`44`	`newSignature.effectSpecifiers = newEffects`