Resume continuation on cancellation when using .async() (#1334)

* Resume continuation on cancellation when using .async()

* PromiseKit 8.1.2

Author: ChaosCoder

Diff for: PromiseKit.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name = "PromiseKit"
 
-  s.version = '8.1.1'
+  s.version = '8.1.2'
 
   s.source = {
     :git => "https://github.com/mxcl/#{s.name}.git",

Diff for: PromiseKit.xcodeproj/project.pbxproj

@@ -957,7 +957,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 8.1.1;
+				CURRENT_PROJECT_VERSION = 8.1.2;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -1020,7 +1020,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 8.1.1;
+				CURRENT_PROJECT_VERSION = 8.1.2;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;

Diff for: Sources/Async.swift

@@ -17,7 +17,7 @@ public extension Promise {
         try await withCheckedThrowingContinuation { continuation in
             done { value in
                 continuation.resume(returning: value)
-            }.catch { error in
+            }.catch(policy: .allErrors) { error in
                 continuation.resume(throwing: error)
             }
         }

Diff for: Tests/CorePromise/AsyncTests.swift

@@ -94,5 +94,55 @@ class AsyncTests: XCTestCase {
 
     }
     #endif
+    
+    #if swift(>=5.5)
+    #if canImport(_Concurrency)
+    @available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, *)
+    func testAsyncPromiseCancel() async throws {
+        do {
+            let p = after(seconds: 0).done { _ in
+                throw LocalError.cancel
+            }.done {
+                XCTFail()
+            }
+            p.catch { _ in
+                XCTFail()
+            }
+            try await p.async()
+            XCTAssert(false)
+        } catch {
+            guard let cancellableError = error as? CancellableError else { return XCTFail("Unexpected error type") }
+            XCTAssertTrue(cancellableError.isCancelled)
+        }
+    }
+    
+    @available(iOS, deprecated: 13.0)
+    @available(macOS, deprecated: 10.15)
+    @available(tvOS, deprecated: 13.0)
+    @available(watchOS, deprecated: 6.0)
+    func testAsyncPromiseCancel() {
+        
+    }
+    #else
+    func testAsyncPromiseCancel() {
+        
+    }
+    #endif
+    #else
+    func testAsyncPromiseCancel() {
+        
+    }
+    #endif
 }
 
+private enum LocalError: CancellableError {
+    case notCancel
+    case cancel
+    
+    var isCancelled: Bool {
+        switch self {
+        case .notCancel: return false
+        case .cancel: return true
+        }
+    }
+}