Add coverage to README

README.md

@@ -33,3 +33,16 @@ Tests are using both JSDOM and custom Vereign [DOM parser](https://code.vereign.
 Vereign DOM parser has been developed to support MIME normalisation in Google Add-on and is a must for testing.
 
 Whenever you develop a new normalisation logic, ensure that Vereign DOM parser and Google Add-on support functions you apply.
+
+## Coverage
+
+- GMail-GMail
+  - [Chrome-Chrome](__tests__/files/gmail-gmail/chrome-chrome/README.md)
+- GMail-Outlook
+  - [Chrome-Chrome](__tests__/files/gmail-outlook/chrome-chrome/README.md)
+- Outlook-GMail
+  - [Chrome-Chrome](__tests__/files/outlook-gmail/chrome-chrome/README.md)
+- Outlook-Outlook
+  - [Chrome-Chrome](__tests__/files/outlook-outlook/chrome-chrome/README.md)
+  - [MacOS Desktop-MacOS Deskop](__tests__/files/outlook-outlook/macos-macos/README.md)
+  - [Windows Desktop-Windows Deskop](__tests__/files/outlook-outlook/windows-windows/README.md)