add builtin definitions checker

packages/babel-plugin-polyfill-corejs3/test/check-builtin-definitions.test.js

@@ -0,0 +1,57 @@
+import corejs3Entries from "../core-js-compat/entries";
+
+import {
+  BuiltIns,
+  StaticProperties,
+  InstanceProperties,
+} from "../src/built-in-definitions.js";
+
+const supportedCorejs3Modules = new Set();
+
+const corejs3Modules = corejs3Entries["core-js"];
+
+function addsupportedCorejs3Modules(descriptors) {
+  for (const { global } of Object.values(descriptors)) {
+    for (const dep of global) {
+      supportedCorejs3Modules.add(dep);
+    }
+  }
+}
+addsupportedCorejs3Modules(BuiltIns);
+
+for (const properties of Object.values(StaticProperties)) {
+  addsupportedCorejs3Modules(properties);
+}
+
+addsupportedCorejs3Modules(InstanceProperties);
+
+const allowList = new Set([]);
+
+describe("corejs3 builtin definitions", () => {
+  it("should support most corejs3 features", () => {
+    let todoListItem = 0;
+    for (const name of corejs3Modules) {
+      if (supportedCorejs3Modules.has(name)) continue;
+      if (name.startsWith("es.")) {
+        const esNextName = "esnext." + name.slice(3);
+        if (supportedCorejs3Modules.has(esNextName)) {
+          todoListItem++;
+          console.error(
+            `Please replace "${esNextName}" by "${name}" in
+packages/babel-plugin-polyfill-corejs3/src/built-in-definitions.js.`,
+          );
+        } else {
+          if (!allowList.has(name)) {
+            todoListItem++;
+            console.error(
+              `"${esNextName}" is not supported, please add it to
+packages/babel-plugin-polyfill-corejs3/src/built-in-definitions.js
+or the allowlist in packages/babel-plugin-polyfill-corejs3/test/check-builtin-definitions.test.js`,
+            );
+          }
+        }
+      }
+    }
+    expect(todoListItem).toBe(0);
+  });
+});