Fix some warnings (#3279)

We have a few warnings, mostly in the test suite, that have cropped up
with deprecations and Xcode 16 strict concurrency, so let's address
them.

Author: stephencelis

ComposableArchitecture.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -68,17 +68,17 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-custom-dump",
       "state" : {
-        "revision" : "aec6a73f5c1dc1f1be4f61888094b95cf995d973",
-        "version" : "1.3.2"
+        "revision" : "82645ec760917961cfa08c9c0c7104a57a0fa4b1",
+        "version" : "1.3.3"
       }
     },
     {
       "identity" : "swift-dependencies",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-dependencies",
       "state" : {
-        "revision" : "cc26d06125dbc913c6d9e8a905a5db0b994509e0",
-        "version" : "1.3.5"
+        "revision" : "d7472be6b3c89251ce4c0db07d32405b43426781",
+        "version" : "1.3.7"
       }
     },
     {
@@ -113,8 +113,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-macro-testing",
       "state" : {
-        "revision" : "a35257b7e9ce44e92636447003a8eeefb77b145c",
-        "version" : "0.5.1"
+        "revision" : "20c1a8f3b624fb5d1503eadcaa84743050c350f4",
+        "version" : "0.5.2"
       }
     },
     {
@@ -131,17 +131,17 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-snapshot-testing.git",
       "state" : {
-        "revision" : "c097f955b4e724690f0fc8ffb7a6d4b881c9c4e3",
-        "version" : "1.17.2"
+        "revision" : "6d932a79e7173b275b96c600c86c603cf84f153c",
+        "version" : "1.17.4"
       }
     },
     {
       "identity" : "swift-syntax",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/swiftlang/swift-syntax",
       "state" : {
-        "revision" : "4c6cc0a3b9e8f14b3ae2307c5ccae4de6167ac2c",
-        "version" : "600.0.0-prerelease-2024-06-12"
+        "revision" : "06b5cdc432e93b60e3bdf53aff2857c6b312991a",
+        "version" : "600.0.0-prerelease-2024-07-30"
       }
     },
     {

Examples/SyncUps/SyncUpsTests/SyncUpFormTests.swift

@@ -20,7 +20,7 @@ final class SyncUpFormTests: XCTestCase {
       $0.uuid = .incrementing
     }
 
-    XCTAssertNoDifference(
+    expectNoDifference(
       store.state.syncUp.attendees,
       [
         Attendee(id: Attendee.ID(UUID(0)))

Sources/ComposableArchitecture/Internal/AssumeIsolated.swift

@@ -0,0 +1,30 @@
+import Foundation
+
+extension MainActor {
+  // NB: This functionality was not back-deployed in Swift 5.9
+  static func _assumeIsolated<T : Sendable>(
+    _ operation: @MainActor () throws -> T,
+    file: StaticString = #fileID,
+    line: UInt = #line
+  ) rethrows -> T {
+    #if swift(<5.10)
+      typealias YesActor = @MainActor () throws -> T
+      typealias NoActor = () throws -> T
+
+      guard Thread.isMainThread else {
+        fatalError(
+          "Incorrect actor executor assumption; Expected same executor as \(self).",
+          file: file,
+          line: line
+        )
+      }
+
+      return try withoutActuallyEscaping(operation) { (_ fn: @escaping YesActor) throws -> T in
+        let rawFn = unsafeBitCast(fn, to: NoActor.self)
+        return try rawFn()
+      }
+    #else
+      return try assumeIsolated(operation, file: file, line: line)
+    #endif
+  }
+}

Sources/ComposableArchitecture/Internal/DispatchQueue.swift

@@ -2,7 +2,7 @@ import Dispatch
 
 func mainActorASAP(execute block: @escaping @MainActor @Sendable () -> Void) {
   if DispatchQueue.getSpecific(key: key) == value {
-    assumeMainActorIsolated {
+    MainActor._assumeIsolated {
       block()
     }
   } else {
@@ -18,10 +18,3 @@ private let key: DispatchSpecificKey<UInt8> = {
   return key
 }()
 private let value: UInt8 = 0
-
-// NB: Currently we can't use 'MainActor.assumeIsolated' on CI, but we can approximate this in
-//     the meantime.
-@MainActor(unsafe)
-private func assumeMainActorIsolated(_ block: @escaping @MainActor @Sendable () -> Void) {
-  block()
-}

Sources/ComposableArchitecture/SharedState/Shared.swift

@@ -218,12 +218,14 @@ public struct Shared<Value> {
       }
       try updateValueToExpectedResult(&snapshot)
       self.snapshot = snapshot
-      // TODO: Finesse error more than `XCTAssertNoDifference`
-      XCTAssertNoDifference(
+      // TODO: Finesse error more than `expectNoDifference`
+      expectNoDifference(
         self.currentValue,
         self.snapshot,
-        file: filePath,
-        line: line
+        fileID: fileID,
+        filePath: filePath,
+        line: line,
+        column: column
       )
       self.snapshot = nil
     }

Tests/ComposableArchitectureTests/DebugTests.swift

@@ -97,7 +97,7 @@
       }
       store.send(true)
       try await Task.sleep(nanoseconds: 300_000_000)
-      XCTAssertNoDifference(
+      expectNoDifference(
         logs.value,
         """
         - true
@@ -129,7 +129,7 @@
       store.send(true)
       store.send(false)
       _ = XCTWaiter.wait(for: [self.expectation(description: "wait")], timeout: 0.3)
-      XCTAssertNoDifference(
+      expectNoDifference(
         logs.value,
         """
         - true
@@ -177,7 +177,7 @@
       }
       store.send(true)
       try await Task.sleep(nanoseconds: 300_000_000)
-      XCTAssertNoDifference(
+      expectNoDifference(
         logs.value,
         #"""
           DebugTests.State(