Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/import-in-the-middle/test/get-esm-exports/v18.19-get-esm-exports.js

@@ -0,0 +1,3 @@
+// v18.19.0 backported ESM hook execution to a separate thread,
+// thus being equivalent to >=v20.
+require('./v20-get-esm-exports')

node_modules/import-in-the-middle/test/get-esm-exports/v20-get-esm-exports.js

@@ -0,0 +1,31 @@
+'use strict'
+
+const getEsmExports = require('../../lib/get-esm-exports.js')
+const fs = require('fs')
+const assert = require('assert')
+const path = require('path')
+
+const fixturePath = path.join(__dirname, '../fixtures/esm-exports.txt')
+const fixture = fs.readFileSync(fixturePath, 'utf8')
+
+fixture.split('\n').forEach(line => {
+  if (!line.includes(' //| ')) return
+  const [mod, testStr] = line.split(' //| ')
+  const expectedNames = testStr.split(',').map(x => x.trim())
+  if (expectedNames[0] === '') {
+    expectedNames.length = 0
+  }
+  const names = Array.from(getEsmExports(mod))
+  assert.deepEqual(expectedNames, names)
+  console.log(`${mod}\n  ✅ contains exports: ${testStr}`)
+})
+
+// // Generate fixture data
+// fixture.split('\n').forEach(line => {
+//   if (!line.includes('export ')) {
+//     console.log(line)
+//     return
+//   }
+//   const names = getEsmExports(line)
+//   console.log(line, '//|', names.join(','))
+// })