Extending PowerShell Pester with Custom Assertions

After the initial release of my OpenWeatherMap PowerShell module [http://kamranicus.com/blog/2016/08/12/posh-openweathermap-powershell-module/] I decided it might be a good idea to write some tests. This was my first time using Pester [https://github.com/pester/Pester], a BDD-style testing framewor…