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package com.google.api.client.googleapis.auth.oauth2;

import static org.junit.Assert.assertEquals;

import com.google.api.client.json.gson.GsonFactory;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests for CloudShellCredential */
@RunWith(JUnit4.class)
public class CloudShellCredentialTest {

  @Test
  public void refreshAccessToken() throws IOException {
    final ServerSocket authSocket = new ServerSocket(0);
    Runnable serverTask =
        new Runnable() {
          @Override
          public void run() {
            try {
              Socket clientSocket = authSocket.accept();
              BufferedReader input =
                  new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
              String lines = input.readLine();
              lines += '\n' + input.readLine();
              assertEquals(CloudShellCredential.GET_AUTH_TOKEN_REQUEST, lines);

              PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
              out.println("32\n[\"email\", \"project-id\", \"token\", 1234]");
            } catch (Exception reThrown) {
              throw new RuntimeException(reThrown);
            }
          }
        };
    Thread serverThread = new Thread(serverTask);
    serverThread.start();

    GoogleCredential creds =
        new CloudShellCredential(authSocket.getLocalPort(), GsonFactory.getDefaultInstance());
    assertEquals("token", creds.executeRefreshToken().getAccessToken());
  }
}
