Test complete

scripts/codegen.js

@@ -0,0 +1,5 @@
+#!/usr/bin/env node
+const fs = require("fs")
+const [arg] = process.argv.slice(2)
+const files = fs.readdirSync(arg).filter(name => name[0] !== ".")
+console.log("export type Snapshot = " + files.map(v => JSON.stringify(v)).join(" | "))