Encountering a JavaScript Error: "e is null" while utilizing assert for checking JavaScript alert text

I encountered a javascript alert in my program that I was able to interact with by reading the text and clicking on the buttons. However, when I tried to verify the alert text using assertequals function, I faced an error. Here is the code snippet:

String test = driver.switchTo().alert().getText();
System.out.println(test);
Assert.assertEquals(test, "You are sharing your report with \"Limited Overall-10000 \".\n\nThis will share your report with \"179\" people. Continue?");

While System.out.println successfully displayed the alert text, I received the following error message when attempting to use assertequals. Interestingly, this issue only occurs for this specific alert, as similar steps work fine for other javascript alerts on the page.

 org.openqa.selenium.WebDriverException: [JavaScript Error: "e is null" {file: "file:///C:/Users/IBM_AD~1/AppData/Local/Temp/anonymous2086351268768311654webdriver-profile/extensions/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="a4c2dcc0d6cdd2c1d6e4c3cbcbc3c8c1c7cbc0c18ac7cbc9">[email protected]</a>/components/command_processor.js" line: 7716}]
javajavascriptselenium

Answer №1

I encountered a similar error myself.

Upon investigation, I realized that I was mistakenly closing the webdriver prior to dismissing the alert box.

By properly handling the alert by clicking on it first and foremost, followed by closing the driver, the problem was resolved.

Answer №2

Encountered a glitch in Selenium that needs troubleshooting:

(Interestingly, these two bug reports are interconnected.)

Selenium seems to have an issue where terminating the driver while an alert is active results in errors like e is null or similar messages. As pointed out by Lawrence Tierney, it's crucial to ensure that the alert is closed before ending the driver. Your code should incorporate this step regardless of the assert outcome.

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