add swiftUI code

iOS-SwiftUI-Code/GRDB.swift-6.29.3/Tests/CombineExpectations/RecordingError.swift

@@ -0,0 +1,30 @@
+#if canImport(Combine)
+import Foundation
+
+/// An error that may be thrown when waiting for publisher expectations.
+public enum RecordingError: Error {
+    /// The publisher did not complete.
+    case notCompleted
+    
+    /// The publisher did not publish enough elements.
+    /// For example, see `recorder.single`.
+    case notEnoughElements
+    
+    /// The publisher did publish too many elements.
+    /// For example, see `recorder.single`.
+    case tooManyElements
+}
+
+extension RecordingError: LocalizedError {
+    public var errorDescription: String? {
+        switch self {
+        case .notCompleted:
+            return "RecordingError.notCompleted"
+        case .notEnoughElements:
+            return "RecordingError.notEnoughElements"
+        case .tooManyElements:
+            return "RecordingError.tooManyElements"
+        }
+    }
+}
+#endif