fix(emit): regression - keep comments in emit (#23815)

Closes https://github.com/denoland/deno/discussions/23814

3 files changed, 15 insertions, 0 deletions

diff --git a/tests/specs/run/keep_comments_ts/__test__.jsonc b/tests/specs/run/keep_comments_ts/__test__.jsonc
new file mode 100644
index 000000000..5517e693d
--- /dev/null
+++ b/tests/specs/run/keep_comments_ts/__test__.jsonc
@@ -0,0 +1,4 @@
+{
+  "args": "run main.ts",
+  "output": "main.out"
+}
diff --git a/tests/specs/run/keep_comments_ts/main.out b/tests/specs/run/keep_comments_ts/main.out
new file mode 100644
index 000000000..8cf85ee71
--- /dev/null
+++ b/tests/specs/run/keep_comments_ts/main.out
@@ -0,0 +1,4 @@
+function test() {
+  // this comment should be in output
+  return 1 + 1;
+}
diff --git a/tests/specs/run/keep_comments_ts/main.ts b/tests/specs/run/keep_comments_ts/main.ts
new file mode 100644
index 000000000..ff58eff2e
--- /dev/null
+++ b/tests/specs/run/keep_comments_ts/main.ts
@@ -0,0 +1,7 @@
+function test() {
+  // this comment should be in output
+  return 1 + 1;
+}
+
+// should include the comments because people rely on this behavior
+console.log(test.toString());