public void YandexLogin_ValidCredentials(BrowserType browser)
{
mainPage.MailLoginClick();
windowActions.SwitchBetweenWindows(WebDriver, 1);
loginPage.EnterLogin(TestData.validLogin);
loginPage.ClickSignIn();
loginPage.EnterPassword(TestData.validPassword);
loginPage.ClickSignIn();
var userName = mailIncomingMessagesPage.GetUserName();
Assert.Multiple(() =>
{
Assert.NotNull(userName, "User name is null");
Assert.AreEqual(TestData.validLogin, userName, "User names are not equal");
});
}