Need more details about test at README.md

[Philmist]

README.md says

To test, place MV’s project in game/ and type
npm test

I copy all files from project folder (contains Game.rpgproject) to ./game/ directory.
But error occurs (TypeError undefined is not a function(TestPlay in Editor) or TypeError WebAudio.Initialize is not a function(Open Index.html at firefox) ).

Is this method correct or something wrong?

What version of RPG Maker you generated by?
To find your project's version, open Game.rpgproject by Text Editor.

If you use Plugins, turn off them all. it may conflict.
But, we concern about Plugins compatibility, please report conflicted plugin if you can.

[Philmist]

RPGMV 1.3.1 is written in Game.rpgprojet.
I didn't know this is old version of RPG Maker MV.
I'll try to update MV, and report it later.

[Philmist]

I update RPG Maker MV from 1.3.1 to 1.3.4.

Create blank project (New project) and copy files to repository direcotory,
It works!

Sorry for my mistake.