Handle optionals in Key paths

Author: ABridoux

Sources/SafeFetching/Extensions/KeyPath+Extensions.swift

@@ -11,6 +11,8 @@ extension KeyPath where Root: NSObject {
     var label: Substring {
         let description = String(describing: self)
         let prefixToDrop = "\\\(Root.self)."
-        return description.dropFirst(prefixToDrop.count)
+        var value = description.dropFirst(prefixToDrop.count)
+        value.removeAll { $0 == "?" }
+        return value
     }
 }

Tests/SafeFetchingTests/BooleanPredicateBuilderTests.swift

@@ -27,6 +27,7 @@ final class BooleanPredicateTests: XCTestCase {
         testNSFormat(predicate: \.stubDate == date, expecting: #"stubDate == CAST(\#(date.timeIntervalSinceReferenceDate), "NSDate")"#)
 
         testNSFormat(predicate: \.stubRelationship == nil, expecting: "stubRelationship == nil")
+        testNSFormat(predicate: \.stubRelationship?.property == "Toto", expecting: #"stubRelationship.property == "Toto""#)
     }
 
     func testString() {