fix test

Author: zunda-pixel

Tests/FunctionsTests/FunctionsClientTests.swift

@@ -25,7 +25,7 @@ final class FunctionsClientTests: XCTestCase {
     XCTAssertEqual(client.region, "sa-east-1")
 
     XCTAssertEqual(client.headers[.init("Apikey")!], apiKey)
-    XCTAssertNotNil(client.headers[.init("X-Client-Info")!])
+    XCTAssertNotNil(client.headers[.xClientInfo])
   }
 
   func testInvoke() async throws {
@@ -49,17 +49,21 @@ final class FunctionsClientTests: XCTestCase {
 
     try await sut.invoke(
       "hello_world",
-      options: .init(headers: ["X-Custom-Key": "value"], body: body)
+      options: .init(
+        headers: ["X-Custom-Key": "value"],
+        body: body
+      )
     )
 
-    guard let request = await http.receivedRequests.last else { return }
-
+    let _request = await http.receivedRequests.last
+    let request = try XCTUnwrap(_request)
+    
     XCTAssertEqual(request.request.url, url)
     XCTAssertEqual(request.request.method, .post)
     XCTAssertEqual(request.request.headerFields[.init("Apikey")!], apiKey)
     XCTAssertEqual(request.request.headerFields[.init("X-Custom-Key")!], "value")
     XCTAssertEqual(
-      request.request.headerFields[.init("X-Client-Info")!],
+      request.request.headerFields[.xClientInfo],
       "functions-swift/\(Functions.version)"
     )
   }