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Tests/NatsTests/Integration/MessageWithHeadersTests.swift

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+// Copyright 2024 The NATS Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Foundation
+import Logging
+import Nats
+import NatsServer
+import XCTest
+
+class TestMessageWithHeadersTests: XCTestCase {
+
+    static var allTests = [
+        ("testMessageWithHeaders", testMessageWithHeaders)
+    ]
+
+    var natsServer = NatsServer()
+
+    override func tearDown() {
+        super.tearDown()
+        natsServer.stop()
+    }
+
+    func testMessageWithHeaders() async throws {
+        natsServer.start()
+        logger.logLevel = .critical
+
+        let client = NatsClientOptions().url(URL(string: natsServer.clientURL)!).build()
+        try await client.connect()
+
+        let sub = try await client.subscribe(subject: "foo")
+
+        var hm = NatsHeaderMap()
+        hm.append(try! NatsHeaderName("foo"), NatsHeaderValue("bar"))
+        hm.append(try! NatsHeaderName("foo"), NatsHeaderValue("baz"))
+        hm.insert(try! NatsHeaderName("another"), NatsHeaderValue("one"))
+
+        try await client.publish(
+            "hello".data(using: .utf8)!, subject: "foo", reply: nil, headers: hm)
+
+        let iter = sub.makeAsyncIterator()
+        let msg = try await iter.next()
+        XCTAssertEqual(msg!.headers, hm)
+
+    }
+}