chore: added separate test for class expressions

Author: bizob2828

tests/class_expression_cjs/mod.js

@@ -0,0 +1,17 @@
+/**
+ * Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ * This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2025 Datadog, Inc.
+ **/
+class UndiciBase {
+    async fetch (url) {
+        return 42;
+    }
+}
+class Undici extends UndiciBase {
+    async fetch (url) {
+        return super.fetch(url);
+    }
+}
+
+module.exports = Undici;
+

tests/class_expression_cjs/mod.rs

@@ -0,0 +1,15 @@
+use crate::common::*;
+use orchestrion_js::*;
+
+#[test]
+fn class_method_cjs() {
+    transpile_and_test(
+        file!(),
+        false,
+        Config::new_single(InstrumentationConfig::new(
+            "Undici:fetch",
+            test_module_matcher(),
+            FunctionQuery::class_method("Undici", "fetch", FunctionKind::Async),
+        )),
+    );
+}

tests/class_expression_cjs/test.js

@@ -0,0 +1,18 @@
+/**
+ * Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ * This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2025 Datadog, Inc.
+ **/
+const Undici = require('./instrumented.js');
+const { assert, getContext } = require('../common/preamble.js');
+const context = getContext('orchestrion:undici:Undici:fetch');
+(async () => {
+  const undici = new Undici;
+  const result = await undici.fetch('https://example.com');
+  assert.strictEqual(result, 42);
+  assert.deepStrictEqual(context, {
+    start: true,
+    end: true,
+    asyncStart: 42,
+    asyncEnd: 42
+  });
+})();

tests/class_method_cjs/mod.js

@@ -7,9 +7,10 @@ class UndiciBase {
         return 42;
     }
 }
-module.exports = class Undici extends UndiciBase {
+class Undici extends UndiciBase {
     async fetch (url) {
         return super.fetch(url);
     }
-};
+}
 
+module.exports = Undici;

tests/instrumentor_test.rs

@@ -4,6 +4,7 @@
  **/
 mod common;
 
+mod class_expression_cjs;
 mod class_method_cjs;
 mod constructor_cjs;
 mod constructor_mjs;