fix: setProviderAndWait does not hang on ProviderError event

Author: nickybondarenko

Sources/OpenFeature/OpenFeatureAPI.swift

@@ -100,6 +100,9 @@ extension OpenFeatureAPI {
                         continuation.resume()
                         holder.removeAll()
                     }
+                    if $0 == .error {
+                        return
+                    }
                 }
                 stateObserver.store(in: &holder)
                 setProvider(provider: provider, initialContext: initialContext)

Tests/OpenFeatureTests/Helpers/DoSomethingProvider.swift

@@ -65,4 +65,8 @@ class DoSomethingProvider: FeatureProvider {
     public struct DoMetadata: ProviderMetadata {
         public var name: String? = DoSomethingProvider.name
     }
+
+    func initWithError() {
+        eventHandler.send(.error)
+    }
 }

Tests/OpenFeatureTests/ProviderEventsTests.swift

@@ -19,4 +19,20 @@ final class ProviderEventsTests: XCTestCase {
         wait(for: [readyExpectation], timeout: 5)
         XCTAssertNotNil(eventState)
     }
+
+    func testErrorEventSent() {
+        provider.initWithError()
+        let errorExpectation = XCTestExpectation(description: "Error")
+        let eventState = provider
+            .observe()
+            .filter { event in
+                event == ProviderEvent.error
+            }
+            .sink { _ in
+                errorExpectation.fulfill()
+            }
+        OpenFeatureAPI.shared.setProvider(provider: provider)
+        wait(for: [errorExpectation], timeout: 5)
+        XCTAssertNotNil(eventState)
+    }
 }