From 585cdd5bcd25289fcbbca264e295db86f2afddc9 Mon Sep 17 00:00:00 2001
From: Dunqing <29533304+Dunqing@users.noreply.github.com>
Date: Tue, 8 Oct 2024 05:42:43 +0000
Subject: [PATCH] chore(codegen): add more tests for comments from esbuild
 (#6357)

Copy from https://github.com/rolldown-rs/rolldown/blob/main/crates/rolldown/tests/esbuild/dce/remove_unused_pure_comment_calls/entry.js
---
 .../tests/integration/pure_comments.rs        |  62 +++++++++
 .../integration/snapshots/pure_comments.snap  | 120 ++++++++++++++++++
 2 files changed, 182 insertions(+)

diff --git a/crates/oxc_codegen/tests/integration/pure_comments.rs b/crates/oxc_codegen/tests/integration/pure_comments.rs
index 31ba7452a7daf..5ceb65abec09c 100644
--- a/crates/oxc_codegen/tests/integration/pure_comments.rs
+++ b/crates/oxc_codegen/tests/integration/pure_comments.rs
@@ -133,6 +133,68 @@ const defineSSRCustomElement = () => {
         const Component = // #__PURE__
         React.forwardRef((props, ref) => {});
         ",
+        // Copy from <https://github.com/rolldown-rs/rolldown/blob/main/crates/rolldown/tests/esbuild/dce/remove_unused_pure_comment_calls/entry.js>
+        "
+        function bar() {}
+        let bare = foo(bar);
+
+        let at_yes = /* @__PURE__ */ foo(bar);
+        let at_no = /* @__PURE__ */ foo(bar());
+        let new_at_yes = /* @__PURE__ */ new foo(bar);
+        let new_at_no = /* @__PURE__ */ new foo(bar());
+
+        let nospace_at_yes = /*@__PURE__*/ foo(bar);
+        let nospace_at_no = /*@__PURE__*/ foo(bar());
+        let nospace_new_at_yes = /*@__PURE__*/ new foo(bar);
+        let nospace_new_at_no = /*@__PURE__*/ new foo(bar());
+
+        let num_yes = /* #__PURE__ */ foo(bar);
+        let num_no = /* #__PURE__ */ foo(bar());
+        let new_num_yes = /* #__PURE__ */ new foo(bar);
+        let new_num_no = /* #__PURE__ */ new foo(bar());
+
+        let nospace_num_yes = /*#__PURE__*/ foo(bar);
+        let nospace_num_no = /*#__PURE__*/ foo(bar());
+        let nospace_new_num_yes = /*#__PURE__*/ new foo(bar);
+        let nospace_new_num_no = /*#__PURE__*/ new foo(bar());
+
+        let dot_yes = /* @__PURE__ */ foo(sideEffect()).dot(bar);
+        let dot_no = /* @__PURE__ */ foo(sideEffect()).dot(bar());
+        let new_dot_yes = /* @__PURE__ */ new foo(sideEffect()).dot(bar);
+        let new_dot_no = /* @__PURE__ */ new foo(sideEffect()).dot(bar());
+
+        let nested_yes = [1, /* @__PURE__ */ foo(bar), 2];
+        let nested_no = [1, /* @__PURE__ */ foo(bar()), 2];
+        let new_nested_yes = [1, /* @__PURE__ */ new foo(bar), 2];
+        let new_nested_no = [1, /* @__PURE__ */ new foo(bar()), 2];
+
+        let single_at_yes = // @__PURE__
+                foo(bar);
+        let single_at_no = // @__PURE__
+                foo(bar());
+        let new_single_at_yes = // @__PURE__
+                new foo(bar);
+        let new_single_at_no = // @__PURE__
+                new foo(bar());
+
+        let single_num_yes = // #__PURE__
+                foo(bar);
+        let single_num_no = // #__PURE__
+                foo(bar());
+        let new_single_num_yes = // #__PURE__
+                new foo(bar);
+        let new_single_num_no = // #__PURE__
+                new foo(bar());
+
+        let bad_no = /* __PURE__ */ foo(bar);
+        let new_bad_no = /* __PURE__ */ new foo(bar);
+
+        let parens_no = (/* @__PURE__ */ foo)(bar);
+        let new_parens_no = new (/* @__PURE__ */ foo)(bar);
+
+        let exp_no = /* @__PURE__ */ foo() ** foo();
+        let new_exp_no = /* @__PURE__ */ new foo() ** foo();
+        ",
     ];
 
     snapshot("pure_comments", &cases);
diff --git a/crates/oxc_codegen/tests/integration/snapshots/pure_comments.snap b/crates/oxc_codegen/tests/integration/snapshots/pure_comments.snap
index 74c8521bb1420..b653834f5bc41 100644
--- a/crates/oxc_codegen/tests/integration/snapshots/pure_comments.snap
+++ b/crates/oxc_codegen/tests/integration/snapshots/pure_comments.snap
@@ -277,3 +277,123 @@ const defineSSRCustomElement = () => {
         
 ----------
 const Component = /* #__PURE__*/ React.forwardRef((props, ref) => {});
+
+########## 21
+
+        function bar() {}
+        let bare = foo(bar);
+
+        let at_yes = /* @__PURE__ */ foo(bar);
+        let at_no = /* @__PURE__ */ foo(bar());
+        let new_at_yes = /* @__PURE__ */ new foo(bar);
+        let new_at_no = /* @__PURE__ */ new foo(bar());
+
+        let nospace_at_yes = /*@__PURE__*/ foo(bar);
+        let nospace_at_no = /*@__PURE__*/ foo(bar());
+        let nospace_new_at_yes = /*@__PURE__*/ new foo(bar);
+        let nospace_new_at_no = /*@__PURE__*/ new foo(bar());
+
+        let num_yes = /* #__PURE__ */ foo(bar);
+        let num_no = /* #__PURE__ */ foo(bar());
+        let new_num_yes = /* #__PURE__ */ new foo(bar);
+        let new_num_no = /* #__PURE__ */ new foo(bar());
+
+        let nospace_num_yes = /*#__PURE__*/ foo(bar);
+        let nospace_num_no = /*#__PURE__*/ foo(bar());
+        let nospace_new_num_yes = /*#__PURE__*/ new foo(bar);
+        let nospace_new_num_no = /*#__PURE__*/ new foo(bar());
+
+        let dot_yes = /* @__PURE__ */ foo(sideEffect()).dot(bar);
+        let dot_no = /* @__PURE__ */ foo(sideEffect()).dot(bar());
+        let new_dot_yes = /* @__PURE__ */ new foo(sideEffect()).dot(bar);
+        let new_dot_no = /* @__PURE__ */ new foo(sideEffect()).dot(bar());
+
+        let nested_yes = [1, /* @__PURE__ */ foo(bar), 2];
+        let nested_no = [1, /* @__PURE__ */ foo(bar()), 2];
+        let new_nested_yes = [1, /* @__PURE__ */ new foo(bar), 2];
+        let new_nested_no = [1, /* @__PURE__ */ new foo(bar()), 2];
+
+        let single_at_yes = // @__PURE__
+                foo(bar);
+        let single_at_no = // @__PURE__
+                foo(bar());
+        let new_single_at_yes = // @__PURE__
+                new foo(bar);
+        let new_single_at_no = // @__PURE__
+                new foo(bar());
+
+        let single_num_yes = // #__PURE__
+                foo(bar);
+        let single_num_no = // #__PURE__
+                foo(bar());
+        let new_single_num_yes = // #__PURE__
+                new foo(bar);
+        let new_single_num_no = // #__PURE__
+                new foo(bar());
+
+        let bad_no = /* __PURE__ */ foo(bar);
+        let new_bad_no = /* __PURE__ */ new foo(bar);
+
+        let parens_no = (/* @__PURE__ */ foo)(bar);
+        let new_parens_no = new (/* @__PURE__ */ foo)(bar);
+
+        let exp_no = /* @__PURE__ */ foo() ** foo();
+        let new_exp_no = /* @__PURE__ */ new foo() ** foo();
+        
+----------
+function bar() {}
+let bare = foo(bar);
+let at_yes = /* @__PURE__ */ foo(bar);
+let at_no = /* @__PURE__ */ foo(bar());
+let new_at_yes = /* @__PURE__ */ new foo(bar);
+let new_at_no = /* @__PURE__ */ new foo(bar());
+let nospace_at_yes = /*@__PURE__*/ foo(bar);
+let nospace_at_no = /*@__PURE__*/ foo(bar());
+let nospace_new_at_yes = /*@__PURE__*/ new foo(bar);
+let nospace_new_at_no = /*@__PURE__*/ new foo(bar());
+let num_yes = /* #__PURE__ */ foo(bar);
+let num_no = /* #__PURE__ */ foo(bar());
+let new_num_yes = /* #__PURE__ */ new foo(bar);
+let new_num_no = /* #__PURE__ */ new foo(bar());
+let nospace_num_yes = /*#__PURE__*/ foo(bar);
+let nospace_num_no = /*#__PURE__*/ foo(bar());
+let nospace_new_num_yes = /*#__PURE__*/ new foo(bar);
+let nospace_new_num_no = /*#__PURE__*/ new foo(bar());
+let dot_yes = /* @__PURE__ */ foo(sideEffect()).dot(bar);
+let dot_no = /* @__PURE__ */ foo(sideEffect()).dot(bar());
+let new_dot_yes = /* @__PURE__ */ new foo(sideEffect()).dot(bar);
+let new_dot_no = /* @__PURE__ */ new foo(sideEffect()).dot(bar());
+let nested_yes = [
+	1,
+	/* @__PURE__ */ foo(bar),
+	2
+];
+let nested_no = [
+	1,
+	/* @__PURE__ */ foo(bar()),
+	2
+];
+let new_nested_yes = [
+	1,
+	/* @__PURE__ */ new foo(bar),
+	2
+];
+let new_nested_no = [
+	1,
+	/* @__PURE__ */ new foo(bar()),
+	2
+];
+let single_at_yes = /* @__PURE__*/ foo(bar);
+let single_at_no = /* @__PURE__*/ foo(bar());
+let new_single_at_yes = /* @__PURE__*/ new foo(bar);
+let new_single_at_no = /* @__PURE__*/ new foo(bar());
+let single_num_yes = /* #__PURE__*/ foo(bar);
+let single_num_no = /* #__PURE__*/ foo(bar());
+let new_single_num_yes = /* #__PURE__*/ new foo(bar);
+let new_single_num_no = /* #__PURE__*/ new foo(bar());
+let bad_no = foo(bar);
+let new_bad_no = new foo(bar);
+let parens_no = foo(bar);
+let new_parens_no = new foo(bar);
+let exp_no = /* @__PURE__ */ foo() ** foo();
+let new_exp_no = /* @__PURE__ */ new foo() ** foo();