feat: add TypeScript helpers (#566)

* create ast.ts

* handle annotations for more node types and add class props helpers

* refactoring

* refactoring and adding methods back

* adding tests

* implement Oliver's suggestions

* update functions tests

* add class tests

* wrap node in class if it's a method

* add methods tests, unnest tests

* add isUnionOf and isIntersectionOf

* add more methods, fix bug in hasReturnAnnotation

* add getParameters tests and initial annotation tests [skip ci]

* refactor: nitpicks and formatting

* refactor: use optional chaining

* refactor: use helper function to simplify hasTypeProp

* feat: make Explorer available in tests

* fix: use environment specific loader for dynamic imports

* chore: ignore eslint

* Apply suggestions from code review

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix errors, remove isUnionOf and isIntersectionOf

* rename find<Nodes> to get<Nodes>

* refactor: use setup file for slow task (webpack)

* test matches with empty trees

* refactor: remove type casts from getAll

* refactor: simplify types

Mostly by using TS's built in type predicates

---------

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

Author: Dario-DC

packages/helpers/lib/class/explorer.ts

@@ -1,6 +1,9 @@
 import { strip } from "./strip";
 import astHelpers from "../python/py_helpers.py";
 
+export const Explorer = async (code: string) =>
+  new (await import("./class/explorer")).Explorer(code);
+
 declare global {
   var IS_REACT_ACT_ENVIRONMENT: boolean;
 }

packages/helpers/lib/index.ts

@@ -6,7 +6,7 @@ const __dirname = new URL(".", import.meta.url).pathname;
 
 const FIXTURES_DIR = path.join(__dirname, "../../../__fixtures__/dist");
 
-export const compileForTests = () => {
+const compileForTests = () => {
   // It's necessary to manually remove the previous build artifacts so we can
   // check that the build is successful. This should not be necessary, but
   // webpack can fail silently.
@@ -17,7 +17,19 @@ export const compileForTests = () => {
   const result = spawnSync(
     "webpack",
     // We only need the test-runner to be compiled for testing.
-    ["--color", "--env", "development", "--config-name", "test-runner"],
+    [
+      "--color",
+      "--env",
+      "development",
+      "--config-name",
+      "test-runner-index",
+      "--config-name",
+      "test-runner-dom-test-evaluator",
+      "--config-name",
+      "test-runner-javascript-test-evaluator",
+      "--config-name",
+      "test-runner-python-test-evaluator",
+    ],
     {
       encoding: "utf8",
     },
@@ -37,3 +49,5 @@ export const compileForTests = () => {
     console.error(result.stderr);
   }
 };
+
+compileForTests();