I need to verify if a image is shown on page with selenium in python.
For example lets check logo in left upper corner of the https://openweathermap.org/ page.
I use execute_script and my code is:
def test_image(driver):
driver.get('https://openweathermap.org/')
time.sleep(10)
image = driver.find_element(By.CSS_SELECTOR, "#first-level-nav > li.logo > a > img")
print(image)
print(driver.execute_script("return (typeof arguments[0].naturalWidth!=\"undefined\");", image))
print(driver.execute_script("return (typeof arguments[0].naturalWidth>0);", image))
print(driver.execute_script("return (arguments[0].naturalWidth);", image))
And I got this results:
True
False
431
Why typeof arguments[0].naturalWidth>0 is False when arguments[0].naturalWidth is 431? And image rendered correctly on the page.
UPDATE: Correct code is:
print(driver.execute_script("return (arguments[0].naturalWidth>0);", image))
>Solution :
The typeof operator takes precedence over >.
typeof 431 === "number"
"number" > 0 === false
typeof 431 > 0 === false