You can test the survey by either creating a test contact list that exactly mimics the structure of the real one and distributing to that list then use those links. By using the links created by a distribution list it will reference those contacts' info and populate the contextual fields.
The other way to test this is by hand creating a Preview URL and just pasting it into the browser. The format for this is found here: https://www.qualtrics.com/support/survey-platform/survey-module/survey-flow/standard-elements/embedded-data/#SettingValuesFromTheSurveyURL
Follow the above info for how to pass embedded data through a URL, however, use the Preview link to the survey as your Base URL. You can reload that as many times as you need to for testing and tweaking.

thanks will have a look