Add tests for issues fixed in #3428 (#3432)

Author: brianc

packages/pg-esm-test/common-js-imports.test.cjs

@@ -0,0 +1,24 @@
+const assert = require('node:assert')
+const test = require('node:test')
+const { describe, it } = test
+
+const paths = ['pg', 'pg/lib/index.js', 'pg/lib/connection-parameters.js']
+for (const path of paths) {
+  describe(`importing ${path}`, () => {
+    it('works with require', () => {
+      const mod = require(path)
+      assert(mod)
+    })
+  })
+}
+
+describe('pg-native', () => {
+  it('should work with commonjs', async () => {
+    const pg = require('pg')
+
+    const pool = new pg.native.Pool()
+    const result = await pool.query('SELECT 1')
+    assert.strictEqual(result.rowCount, 1)
+    pool.end()
+  })
+})