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sclass GazelleSiteTester implements AutoCloseable {
  PlaywrightAndBrowser playwright;
  S site = "https://empty.gazelle.rocks";
  new Scorer scorer;
  
  void init {
    if (playwright == null) playwright = playwrightWithChromium();
  }
  
  abstract class Tester {
    Page page;
    
    void assertPageContainsText(S text) {
      assertNotNull(scorer, text, page.querySelector("text=" + text));
    }
  }
  
  class TestRegistration extends Tester {
    S user = "testuser" + random(1000000);
    S pw = "pw" + random(1000000);
    S contact = "dummy contact";
    
    run {
      init();
      page = playwrightOpenPage(playwright.browser, page, site);
      page.click("text=Register as new user");
      page.fill("[name=user]", user);
      page.fill("[name=f_pw]", pw);
      page.fill("[name=pw2]", pw);
      page.fill("[name=contact]", contact);
      page.click([[[type=submit]:has-text("Register")]]);
      assertPageContainsText(replaceDollarVars("User $user created", +user));
    }
  }
  
  class LogIn extends Tester {
    S user;
    S pw;
    
    run {
      init();
      page = playwrightOpenPage(playwright.browser, page, site);
      page.fill("[name=user]", user);
      page.fill("[name=pw]", pw);
      page.click([[[type=submit]:has-text("Log in")]]);
      assertPageContainsText("[" + user + "]");
      assertPageContainsText("BEA Objects");
    }
  }
  
  LogIn registerAndLogIn() {
    new TestRegistration reg;
    reg.run();
    new LogIn logIn;
    copyFields(reg, logIn, "user", "pw", /*"page"*/);
    logIn.run();
    ret logIn;
  }
  
  public void close { dispose playwright; }
  
  toString { ret "Tested " + site + ": " + scorer; }
}