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I have an application A that should handle a form submit made with POST method. The actual form, that initiates the request, is in totally separate application B. I am testing application A using Selenium, and I like to write a test case for form submit handling.
How to do this? Can this be done in Selenium at all? Application A does not have a form that can initiate this request.
Note, that the request must use POST, otherwise I could just use WebDriver.get(url) method.
553
There are multiple ways of submitting a form in Selenium. One of the methods is to directly use the click() method on the form submitting button. The next approach is to use the submit() method on the form page. Using the submit() method.
Using Requests generally results in faster and more concise code, while using Selenium makes development faster on Javascript heavy sites.
With selenium you can execute arbitrary Javascript including programmatically submit a form.
Simplest JS execution with Selenium Java:
if (driver instanceof JavascriptExecutor) {
System.out.println(((JavascriptExecutor) driver).executeScript("prompt('enter text...');"));
}
and with Javascript you can create a POST request, set the required parameters and HTTP headers, and submit it.
// Javascript example of a POST request
var xhr = new XMLHttpRequest();
// false as 3rd argument will forces synchronous processing
xhr.open('POST', 'http://httpbin.org/post', false);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.send('login=test&password=test');
alert(xhr.response);
In modern bleeding edge browsers you can also use
fetch().
If you need to pass over to selenium the response text then instead of alert(this.responseText) use return this.responseText or return this.response and assign to a variable the result of execute_script (or execute_async_script) (if using python). For java that will be executeScript() or executeAsyncScript() correspondingly.
Here is a full example for python:
from selenium import webdriver
driver = webdriver.Chrome()
js = '''var xhr = new XMLHttpRequest();
xhr.open('POST', 'http://httpbin.org/post', false);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.send('login=test&password=test');
return xhr.response;'''
result = driver.execute_script(js);
result will contain the return value of your JavaScript provided that the js code is synchronous. Setting false as the third argument to xhr.open(..) forces the request to be synchronous. Setting the 3rd arg to true or omitting it will make the request asynchronous.
❗️ If you are calling asynchronous js code then make sure that instead of
execute_scriptyou useexecute_async_scriptor otherwise the call won't return anything!
NOTE: If you need to pass string arguments to the javascript make sure you always escape them using
json.dumps(myString)or otherwise your js will break when the string contains single or double quotes or other tricky characters.
161
I don't think that's possible using Selenium. There isn't a way to create a POST request out of nothing using a web browser, and Selenium works by manipulating web browsers. I'd suggest you use a HTTP library to send the POST request instead, and run that alongside your Selenium tests. (What language/testing framework are you using?)
25
The easiest way I found is making an intermediary page solely for the purposes of submitting a POST request. Have selenium open the page, submit the form, and then get the source of the final page.
from selenium import webdriver
html='<html><head><title>test</title></head><body><form action="yoursite.com/postlocation" method="post" id="formid"><input type="hidden" name="firstName" id="firstName" value="Bob"><input type="hidden" name="lastName" id="lastName" value="Boberson"><input type="submit" id="inputbox"></form></body></html>'
htmlfile='/tmp/temp.html'
try:
with open(htmlfile, "w") as text_file:
text_file.write(html)
except:
print('Unable to create temporary HTML file')
from selenium.webdriver.support.ui import WebDriverWait
driver = webdriver.Firefox()
driver.get('file://'+htmlfile)
driver.find_element_by_id('inputbox').click();
#wait for form to submit and finish loading page
wait = WebDriverWait(driver, 30)
response=driver.page_source
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