Add async JSPromise.result property (#200)

swiftwasm · Jul 19, 2022 · 901de66 · 901de66
1 parent f1ef517
commit 901de66
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diff --git a/IntegrationTests/TestSuites/Sources/ConcurrencyTests/main.swift b/IntegrationTests/TestSuites/Sources/ConcurrencyTests/main.swift
@@ -32,6 +32,7 @@ func entrypoint() async throws {
  resolve(.success(1))
  })
  try await expectEqual(p.value, 1)
+ try await expectEqual(p.result, .success(.number(1)))
  }
 
  try await asyncTest("await rejected Promise") {
@@ -41,6 +42,7 @@ func entrypoint() async throws {
  let error = try await expectAsyncThrow(await p.value)
  let jsValue = try expectCast(error, to: JSValue.self)
  try expectEqual(jsValue, 3)
+ try await expectEqual(p.result, .failure(.number(3)))
  }
 
  try await asyncTest("Continuation") {

diff --git a/Sources/JavaScriptEventLoop/JavaScriptEventLoop.swift b/Sources/JavaScriptEventLoop/JavaScriptEventLoop.swift
@@ -116,6 +116,24 @@ public extension JSPromise {
  }
  }
  }
+
+ /// Wait for the promise to complete, returning its result or exception as a Result.
+ var result: Result<JSValue, JSValue> {
+ get async {
+ await withUnsafeContinuation { [self] continuation in
+ self.then(
+ success: {
+ continuation.resume(returning: .success($0))
+ return JSValue.undefined
+ },
+ failure: {
+ continuation.resume(returning: .failure($0))
+ return JSValue.undefined
+ }
+ )
+ }
+ }
+ }
 }
 
 #endif