How to capture a screenshot in tests?
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In Playwright, you can locate elements using a variety of methods, similar to Selenium. Playwright supports several ways to find elements on a web page, including CSS selectors, XPath, and text-based selectors. Here’s an overview of the main techniques to locate elements in Playwright, with examples.
In Playwright, the method page .wait For Selector() plays an important role in waiting for an element to appear (or become visible) on the page before interacting with it.
Capturing a screenshot during automated tests is a useful way to debug and document the state of a web page when a test runs — especially when failures occur.
✅ Capturing a Screenshot in Selenium (Python)
You can use the get_screenshot_as_file() or save_screenshot() methods provided by the WebDriver.
📌 Basic Example:
python
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from selenium import webdriver
driver = webdriver.Chrome()
driver.get("https://example.com")
# Capture screenshot and save it as a PNG file
driver.save_screenshot("screenshot.png")
or
python
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driver.get_screenshot_as_file("screenshot.png")
📁 Saving with a Timestamp (Useful in Tests):
python
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import time
timestamp = time.strftime("%Y%m%d-%H%M%S")
driver.save_screenshot(f"screenshot_{timestamp}.png")
🔄 Use in Test Framework (e.g., pytest)
In a testing scenario, like inside a pytest test function, you can capture a screenshot when a test fails:
python
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def test_example(driver): # 'driver' is a Selenium WebDriver fixture
try:
driver.get("https://example.com")
assert "Example Domain" in driver.title
except AssertionError:
driver.save_screenshot("test_example_failed.png")
raise
🔹 Tips
Screenshots are saved in the current working directory unless a path is specified.
Use screenshots to capture visual bugs, layout issues, or unexpected behaviors.
Integrate screenshots with test reports (e.g., Allure or HTML reports) for better traceability.
If you’re using a different language (Java, C#, etc.) or framework (Cypress, Playwright), I can give you tailored guidance.
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