XCTestCase+Firestore.swift

import XCTest
import Firebase

extension XCTestCase {

  func clearFirestore() {
    let semaphore = DispatchSemaphore(value: 0)
    let projectId = FirebaseApp.app()!.options.projectID!
    let url = URL(string: "http://localhost:8080/emulator/v1/projects/\(projectId)/databases/(default)/documents")!
    var request = URLRequest(url: url)
    request.httpMethod = "DELETE"
    let task = URLSession.shared.dataTask(with: request) { _,_,_ in
      print("Firestore cleared")
      semaphore.signal()
    }
    task.resume()
    semaphore.wait()
  }
  
}