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how can I check if some text exist or not in the page?
List<WebElement> list = driver.findElements(By.xpath("//*[contains(text(),'" + text + "')]"));
Assert.assertTrue("Text not found!", list.size() > 0);

String bodyText = driver.findElement(By.tagName("body")).getText();
Assert.assertTrue("Text not found!", bodyText.contains(text));

bodyText = self.driver.find_element_by_tag_name('body').text

self.assertTrue("the text you want to check for" in bodyText)

driver.getPageSource().contains("Text which you looking for");