Add AnyPromise.wait

Sources/AnyPromise.h

@@ -182,6 +182,13 @@ typedef void (^PMKResolver)(id __nullable) NS_REFINED_FOR_SWIFT;
  */
 - (AnyPromise * __nonnull(^ __nonnull)(dispatch_queue_t __nonnull, dispatch_block_t __nonnull))ensureOn NS_REFINED_FOR_SWIFT;
 
+/**
+ Wait until the promise is resolved.
+
+ @return Value if fulfilled or error if rejected.
+ */
+- (id __nullable)wait NS_REFINED_FOR_SWIFT;
+
 /**
  Create a new promise with an associated resolver.
 

Sources/AnyPromise.m

@@ -112,6 +112,10 @@ - (id)__d {
     };
 }
 
+- (id)wait {
+    return [d __wait];
+}
+
 - (BOOL)pending {
     return [[d valueForKey:@"__pending"] boolValue];
 }

Sources/AnyPromise.swift

@@ -61,6 +61,26 @@ import Foundation
         }))
     }
 
+    @objc public func __wait() -> Any? {
+        if Thread.isMainThread {
+            conf.logHandler(.waitOnMainThread)
+        }
+
+        var result = __value
+
+        if result == nil {
+            let group = DispatchGroup()
+            group.enter()
+            self.__pipe { obj in
+                result = obj
+                group.leave()
+            }
+            group.wait()
+        }
+
+        return result
+    }
+
     /// Internal, do not use! Some behaviors undefined.
     @objc public func __pipe(_ to: @escaping (Any?) -> Void) {
         let to = { (obj: Any?) -> Void in

Tests/CoreObjC/AnyPromiseTests.m

@@ -757,6 +757,22 @@ - (void)test_60_catch_on_specific_queue {
     [self waitForExpectationsWithTimeout:1 handler:nil];
 }
 
+- (void)test_61_wait_for_value {    
+    id o = [AnyPromise promiseWithResolverBlock:^(PMKResolver resolve) {
+        resolve(@1);
+    }].wait;
+
+    XCTAssertEqualObjects(o, @1);
+}
+
+- (void)test_62_wait_for_error {
+    NSError* err = [AnyPromise promiseWithResolverBlock:^(PMKResolver resolve) {
+        resolve([NSError errorWithDomain:@"a" code:123 userInfo:nil]);
+    }].wait;
+
+    XCTAssertEqual(err.code, 123);
+}
+
 - (void)test_properties {
     XCTAssertEqualObjects([AnyPromise promiseWithValue:@1].value, @1);
     XCTAssertEqualObjects([[AnyPromise promiseWithValue:dummyWithCode(2)].value localizedDescription], @"2");