[web_generator] Setting up web_generator for Dart JS Interop Gen

[nikeokoronkwo]

This PR is for setting up the web_generator to begin adding support for generating Dart JS interop interface code from TypeScript Declaration Code.

For more information, see the project overview

• I’ve reviewed the contributor guide and applied the relevant portions to this PR.

[srujzs]

Very cool to see us adding TSC and potentially start using it!

[srujzs]

LGTM!

[kevmoo]

The tests don't run by default because they are VM tests.
And when I run them locally they fail because there is not test input/output data.

[kevmoo]

Also

diff --git a/web_generator/test/ts_bindings_test.dart b/web_generator/test/ts_bindings_test.dart
index 3470d7a..8ef208a 100644
--- a/web_generator/test/ts_bindings_test.dart
+++ b/web_generator/test/ts_bindings_test.dart
@@ -9,13 +9,12 @@ import 'package:test/test.dart';
 import 'package:web_generator/src/cli.dart';
 
 void main() {
-  final testGenFolder = p.join('test', 'gen');
-  final testGenDTSFiles = p.join(testGenFolder, 'input');
-
   group('Web Generator TS Bindings Integration Test', () {
+    final testGenFolder = p.join('test', 'gen');
+    final testGenDTSFiles = p.join(testGenFolder, 'input');
     final inputDir = Directory(testGenDTSFiles);
 
-    setUp(() async {
+    setUpAll(() async {
       // set up npm
       await runProc('npm', ['install'],
           workingDirectory: bindingsGeneratorPath, detached: true);

Should keep the group vars together.
Should use setUpAll so the compile is only run once – since there should be ZERO change between tests. But that's once we have tests 😄

[srujzs]

The tests don't run by default because they are VM tests.
And when I run them locally they fail because there is not test input/output data.

It looks like we were skipping a test already because of this: #373.

@nikeokoronkwo I filed #372 to track unskipping this test now that I'm enabling it in the CI. We should add a data folder that we read from and have the test use that.

[nikeokoronkwo]

The tests don't run by default because they are VM tests. And when I run them locally they fail because there is not test input/output data.

I wanted to work on test implementation once we started working on declarations, as adding test cases now would fail anyways.

We should add a data folder that we read from and have the test use that.

The folder I used for this is gen/input for input data and gen/expected for output (both actual and expected)