Selenium After sendkey, do some validation - selenium

Question

I'm new to Selenium, TestNG and Stackoverflow.
After sendkeys, I want to do some validation. If the validation is true, then the assert is true. I know this is not the right way to write the Assert method.
WebDriver driver;
#DataProvider(name= "testdata")
public static Object[][] loginData(){
return new Object[][]{{"username1", "123"}, {"username2", "4211"}};
}
#BeforeTest
public void configure(){
....
}
#Test(dataProvider = "testdata")
public void testmethod(String uname, String password){
WebElement usernameTextbox = driver.findElement(By.id("username"));
usernameTextbox.sendKeys(uname);
WebElement passwordTextbox = driver.findElement(By.id("username"));
passwordTextbox.sendKeys(uname);
driver.manage().timeouts().implicitlyWait(2, TimeUnit.MICROSECONDS);
Assert.assertTrue(if(usernameTextbox.contains("[a-zA-Z0-9]+") && passwordTextbox.contains("[0-9]+") == true));
PS: Any inputs will be appreciated.

Answer 1

Try implementing explicit wait in Your code. What that mean, is that You wait for some condition to be set, here is example how to manage this:
But my suggestion is that You assert if there are some error messages (labels, span, or whatever that appears saying something is wrong with email or pass)
So here is how I would do it:
WebDriver driver;
#DataProvider(name= "testdata")
public static Object[][] loginData(){
return new Object[][]{{"username1", "123"}, {"username2", "4211"}};
}
#BeforeTest
public void configure(){
driver = new WebDriver();
driver.manage().timeouts().implicitlyWait(2, TimeUnit.SECONDS); //this is wait which will wait until driver throws exception (that is not found eg."NoSuchElementException")
}
#Test(dataProvider = "testdata")
public void testmethod(String uname, String password){
WebElement usernameTextbox = driver.findElement(By.id("usernameID"));
usernameTextbox.sendKeys(uname);
WebElement passwordTextbox = driver.findElement(By.id("passwordID"));
passwordTextbox.sendKeys(password); //here is where You've sent wrong param
// if You know You will get error label or something use this
WebDriverWait wait = new WebDriverWait(driver, 10); //wait for max 10 sec, and wait for error element defined bellow
WebElement errorElement = wait.until(ExpectedConditions. presenceOfElementLocated(By.id("someErrorElementId"))); //(or ExpectedConditions.textToBePresentInElement(..)), see what better suites You
// If You're expecting error than use this assert
Assert.assertTrue(errorElement.isDisplayed(),"There should be error message!")
// but If You're expecting that there should not be any error than use this assert
Assert.assertFalse(errorElement.isDisplayed(),"There shouldn't be no error messages!")
}
tweak this code, but basicaly this is the logic.

Answer 2

So to try to answer the original question your code could look like below:
1. Using the getAttribute("value")
2. Building the assertion - you don't need to wrap the condition in an if as the contains() function will return true or false for you:
WebDriver driver;
#DataProvider(name= "testdata")
public static Object[][] loginData(){
return new Object[][]{{"username1", "123"}, {"username2", "4211"}};
}
#BeforeTest
public void configure(){
....
}
#Test(dataProvider = "testdata")
public void testmethod(String uname, String password){
WebElement usernameTextbox = driver.findElement(By.id("username"));
usernameTextbox.sendKeys(uname);
WebElement passwordTextbox = driver.findElement(By.id("username"));
passwordTextbox.sendKeys(uname);
driver.manage().timeouts().implicitlyWait(2, TimeUnit.MICROSECONDS);
Assert.assertTrue(usernameTextbox.getAttribute("value").contains("[a-zA-Z0-9]+") && passwordTextbox.getAttribute("value").contains("[0-9]+"));
HTH

Answer 3

As per your question just after invoking sendKeys() you want to do some assertions.
At this point it is worth to mention that when you invoke sendKeys() on a <input> node/tag/field the HTML DOM is not immediately updated with the value / characters which you have just entered in majority of the cases (of-coarse there are exceptional cases). Moving forward when you invoke click() or submit()on a <button> or similar <input> element, the associated onclick event of this <input> element updates the HTML DOM and the value / characters previously sent through sendKeys() are adjusted within the HTML DOM.
Unless the value / characters are not accommodated within the DOM Tree Selenium won't be able to interact with them.
As per your code block, you have populated the passwordTextbox field with the String value of uname as follows :
passwordTextbox.sendKeys(uname);
This value / characterset is still volatile and editable (can be overwritten/cleared/deleted) as follows :
passwordTextbox.clear();
passwordTextbox.sendKeys("Emma E");
Essentially, Assert methods can be invoked on text those are part of the HTML DOM. As an example you can use the following Assert for a Page Heading, Table Heading, etc :
Assert.assertTrue(if(pageHeaderElement.contains("[a-zA-Z0-9]+") && tableHeaderElement.contains("[0-9]+") == true));