feat: TC39 decorator proposal support (#22040)

This commit adds support for [TC39 Decorator
Proposal](https://github.com/tc39/proposal-decorators).

These decorators are only available in transpiled sources - ie.
non-JavaScript files (because of lack of support in V8).

This entails that "experimental TypeScript decorators" are not available
by default
and require to be configured, with a configuration like this:
```
{
  "compilerOptions": {
    "experimentalDecorators": true
  }
}
```


Closes https://github.com/denoland/deno/issues/19160

---------

Signed-off-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/cli/tests/integration/run_tests.rs b/cli/tests/integration/run_tests.rs
index 3a2b46133..6c82cfeec 100644
--- a/cli/tests/integration/run_tests.rs
+++ b/cli/tests/integration/run_tests.rs
@@ -1508,8 +1508,13 @@ itest!(no_check {
 });
 
 itest!(no_check_decorators {
-  args: "run --quiet --reload --no-check run/no_check_decorators.ts",
-  output: "run/no_check_decorators.ts.out",
+  args: "run --quiet --reload --no-check run/decorators/experimental/no_check/main.ts",
+  output: "run/decorators/experimental/no_check/main.out",
+});
+
+itest!(decorators_tc39_proposal {
+  args: "run --quiet --reload --check run/decorators/tc39_proposal/main.ts",
+  output: "run/decorators/tc39_proposal/main.out",
 });
 
 itest!(check_remote {
@@ -1526,8 +1531,8 @@ itest!(no_check_remote {
 });
 
 itest!(runtime_decorators {
-  args: "run --quiet --reload --no-check run/runtime_decorators.ts",
-  output: "run/runtime_decorators.ts.out",
+  args: "run --quiet --reload --no-check run/decorators/experimental/runtime/main.ts",
+  output: "run/decorators/experimental/runtime/main.out",
 });
 
 itest!(seed_random {
@@ -1591,8 +1596,8 @@ itest!(ts_type_imports {
 });
 
 itest!(ts_decorators {
-  args: "run --reload --check run/ts_decorators.ts",
-  output: "run/ts_decorators.ts.out",
+  args: "run --reload --check run/decorators/experimental/ts/main.ts",
+  output: "run/decorators/experimental/ts/main.out",
 });
 
 itest!(ts_type_only_import {