Add SWC test cases (#49189)

Reorganize the test cases a bit by separating server/client graphs. And
make sure that using `'use server'` inside a Client Component will
result in a compilation error.

packages/next-swc/crates/core/tests/errors.rs

@@ -150,8 +150,8 @@ fn next_font_loaders_errors(input: PathBuf) {
     );
 }
 
-#[fixture("tests/errors/server-actions/**/input.js")]
-fn react_server_actions_errors(input: PathBuf) {
+#[fixture("tests/errors/server-actions/server-graph/**/input.js")]
+fn react_server_actions_server_errors(input: PathBuf) {
     let output = input.parent().unwrap().join("output.js");
     test_fixture(
         syntax(),
@@ -161,7 +161,7 @@ fn react_server_actions_errors(input: PathBuf) {
                 server_components(
                     FileName::Real(PathBuf::from("/app/item.js")),
                     next_swc::react_server_components::Config::WithOptions(
-                        next_swc::react_server_components::Options { is_server: false },
+                        next_swc::react_server_components::Options { is_server: true },
                     ),
                     tr.comments.as_ref().clone(),
                     None,
@@ -181,3 +181,35 @@ fn react_server_actions_errors(input: PathBuf) {
         },
     );
 }
+
+#[fixture("tests/errors/server-actions/client-graph/**/input.js")]
+fn react_server_actions_client_errors(input: PathBuf) {
+    let output = input.parent().unwrap().join("output.js");
+    test_fixture(
+        syntax(),
+        &|tr| {
+            chain!(
+                resolver(Mark::new(), Mark::new(), false),
+                server_components(
+                    FileName::Real(PathBuf::from("/app/item.js")),
+                    next_swc::react_server_components::Config::WithOptions(
+                        next_swc::react_server_components::Options { is_server: false },
+                    ),
+                    tr.comments.as_ref().clone(),
+                    None,
+                ),
+                server_actions(
+                    &FileName::Real("/app/item.js".into()),
+                    server_actions::Config { is_server: false },
+                    tr.comments.as_ref().clone(),
+                )
+            )
+        },
+        &input,
+        &output,
+        FixtureTestConfig {
+            allow_error: true,
+            ..Default::default()
+        },
+    );
+}

packages/next-swc/crates/core/tests/errors/server-actions/client-graph/1/input.js

@@ -0,0 +1,8 @@
+'use client'
+
+export default function App() {
+  async function fn() {
+    'use server'
+  }
+  return <div>App</div>
+}

packages/next-swc/crates/core/tests/errors/server-actions/client-graph/1/output.js

@@ -0,0 +1,10 @@
+/* __next_internal_client_entry_do_not_use__ default auto */ /* __next_internal_action_entry_do_not_use__ $$ACTION_0 */ export default function App() {
+    async function fn() {
+        return $$ACTION_0(fn.$$bound);
+    }
+    fn.$$typeof = Symbol.for("react.server.reference");
+    fn.$$id = "6d53ce510b2e36499b8f56038817b9bad86cabb4";
+    fn.$$bound = null;
+    return <div>App</div>;
+}
+export async function $$ACTION_0(closure) {}

packages/next-swc/crates/core/tests/errors/server-actions/client-graph/1/output.stderr

@@ -0,0 +1,9 @@
+
+  x "use server" functions are not allowed in client components. You can import them from a "use server" file instead.
+   ,-[input.js:3:1]
+ 3 |     export default function App() {
+ 4 | ,->   async function fn() {
+ 5 | |       'use server'
+ 6 | `->   }
+ 7 |       return <div>App</div>
+   `----

packages/next-swc/crates/core/tests/errors/server-actions/server-graph/12/output.js

@@ -0,0 +1,2 @@
+/* __next_internal_client_entry_do_not_use__ foo auto */ const { createProxy  } = require("private-next-rsc-mod-ref-proxy");
+module.exports = createProxy("/app/item.js");

packages/next-swc/crates/core/tests/errors/server-actions/server-graph/13/output.js

@@ -0,0 +1,2 @@
+/* __next_internal_client_entry_do_not_use__ foo auto */ const { createProxy  } = require("private-next-rsc-mod-ref-proxy");
+module.exports = createProxy("/app/item.js");