Adding tests for extensions to types in extensions

Author: goergisn

ReferencePackages/UpdatedPackage/Sources/ReferencePackage/ReferencePackage.swift

@@ -195,9 +195,9 @@ extension CustomEnum: SimpleProtocol {
     }
 }
 
-extension CustomEnum.NestedStructInExtension {
+extension CustomEnum.NestedStructInExtension: CustomStringConvertible {
 
-    var description: String {
+    public var description: String {
         return string
     }
 }

Tests/IntegrationTests/ReferencePackageTests.swift

@@ -67,7 +67,7 @@ class ReferencePackageTests: XCTestCase {
 
         let expectedLines = sanitizeOutput(expectedOutput).components(separatedBy: "\n")
         let markdownOutputLines = sanitizeOutput(markdownOutput).components(separatedBy: "\n")
-
+        
         for i in 0..<expectedLines.count {
             if expectedLines[i] != markdownOutputLines[i] {
                 XCTAssertEqual(expectedLines[i], markdownOutputLines[i], "Issue in line \(i)")

Tests/IntegrationTests/Resources/expected-reference-changes-swift-interface-private.md

@@ -192,9 +192,10 @@ extension ReferencePackage.CustomEnum where T == Swift.String {
 }
 ```
 ```javascript
-public struct NestedStructInExtension {
+public struct NestedStructInExtension: Swift.CustomStringConvertible {
   public init(string: Swift.String = "Hello")
   public let string: Swift.String { get }
+  public var description: Swift.String { get }
 }
 ```
 #### 🔀 Modified

Tests/IntegrationTests/Resources/expected-reference-changes-swift-interface-public.md

@@ -177,9 +177,10 @@ extension ReferencePackage.CustomEnum where T == Swift.String {
 }
 ```
 ```javascript
-public struct NestedStructInExtension {
+public struct NestedStructInExtension: Swift.CustomStringConvertible {
   public init(string: Swift.String = "Hello")
   public let string: Swift.String { get }
+  public var description: Swift.String { get }
 }
 ```
 #### 🔀 Modified