Swift Strict Concurrency (#23)

# Swift Strict Concurrency

## ♻️ Current situation & Problem
Enable Swift strict concurrency and some concurrency fixes.


## ⚙️ Release Notes 
* Enable Swift strict concurrency and some concurrency fixes.


### Code of Conduct & Contributing Guidelines 

By submitting creating this pull request, you agree to follow our [Code
of
Conduct](https://github.com/StanfordBDHG/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordBDHG/.github/blob/main/CONTRIBUTING.md):
- [x] I agree to follow the [Code of
Conduct](https://github.com/StanfordBDHG/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordBDHG/.github/blob/main/CONTRIBUTING.md).

Package.swift

@@ -12,9 +12,9 @@ import PackageDescription
 
 
 #if swift(<6)
-let swiftConcurrency: SwiftSetting = .enableExperimentalFeature("SwiftConcurrency")
+let swiftConcurrency: SwiftSetting = .enableExperimentalFeature("StrictConcurrency")
 #else
-let swiftConcurrency: SwiftSetting = .enableUpcomingFeature("SwiftConcurrency")
+let swiftConcurrency: SwiftSetting = .enableUpcomingFeature("StrictConcurrency")
 #endif
 
 

Sources/XCTestApp/TestAppTestCase.swift

@@ -10,6 +10,7 @@
 /// A collection of test cases that can be executed in an ``TestAppView``.
 public protocol TestAppTestCase: Identifiable {
     /// Implement this method to run all the tests that should be executed.
+    @MainActor
     func runTests() async throws
 }
 

Sources/XCTestExtensions/XCTAssertThrowsErrorAsync.swift

@@ -20,11 +20,11 @@ import XCTest
 ///   - line: The line number where the failure occurs. The default is the line number where you call this function.
 ///   - errorHandler: An optional handler for errors that expression throws.
 public func XCTAssertThrowsErrorAsync<T>(
-    _ expression: @autoclosure () async throws -> T,
-    _ message: @autoclosure () -> String = "",
+    _ expression: @autoclosure @Sendable  () async throws -> T,
+    _ message: @autoclosure @Sendable () -> String = "",
     file: StaticString = #filePath,
     line: UInt = #line,
-    _ errorHandler: (Error) throws -> Void = { _ in }
+    _ errorHandler: @Sendable (Error) throws -> Void = { _ in }
 ) async rethrows {
     do {
         _ = try await expression()

Sources/XCTestExtensions/XCTestCase+DisablePasswordAutofill.swift

@@ -33,6 +33,7 @@ extension XCTestCase {
     @available(macOS, unavailable)
     @available(tvOS, unavailable)
     @available(visionOS, unavailable)
+    @MainActor
     public func disablePasswordAutofill() throws {
         let settingsApp = XCUIApplication(bundleIdentifier: "com.apple.Preferences")
         settingsApp.terminate()

Sources/XCTestExtensions/XCUIElement+TextEntry.swift

@@ -13,7 +13,7 @@ import XCTest
 /// An internal flag that is used to test the flaky simulator text entry behavior in the iOS simulator.
 ///
 /// Do not use this flag outside of the UI tests in the ``XCTestExtensions`` target!
-var simulateFlakySimulatorTextEntry = false
+@MainActor var simulateFlakySimulatorTextEntry = false
 
 
 extension XCUIElement {

Tests/UITests/TestAppUITests/XCTestExtensionsTests.swift

@@ -59,6 +59,7 @@ class XCTestExtensionsTests: XCTestCase {
         XCTAssert(app.staticTexts["No secure text set ..."].waitForExistence(timeout: 5))
     }
 
+    @MainActor
     func testDisablePasswordAutofill() throws {
         #if os(iOS)
         try disablePasswordAutofill()
@@ -75,6 +76,7 @@ class XCTestExtensionsTests: XCTestCase {
         try app.callTextEntryExtensions()
     }
 
+    @MainActor
     func testFlakyTextEntry() throws {
         let app = XCUIApplication()
         app.launch()