wampserver - PHP localhost issue. Folder not opening when clicked inside localhost -

i installed wamp server start practicing php. created folder in www directory. however, when try run file localhost not run.

for ex, created folder "test" in www directory. saved html file called "test.html" inside test folder. have saved in www --> test --> test.html.

i started localhost in browser. found test folder there. when click test folder, instead of opening "localhost/test", opening "test/". how make sure folder, when clicked inside localhost, should open "localhost/<foldername" (in case "localhost/test").

when type "localhost/test" in browser, works fine. when go localhost , click on "test" folder not open.

please me overcome this.
in advance.

you should type file name , extension open file local host file not index.html should go "localhost/test/test.html" work if want file to