Add new test to lock down go-to-def without .cls-commands

Signed-off-by: Danila Fedorin <daniel.fedorin@hpe.com>

tools/chpl-language-server/test/basic.py

@@ -139,6 +139,37 @@ async def test_go_to_definition_use_standard(client: LanguageClient):
         await check_goto_decl_def_module(client, doc, pos((1, 10)), mod_Map)
         await check_goto_decl_def_module(client, doc, pos((2, 8)), mod_Time)
 
+@pytest.mark.asyncio
+async def test_go_to_definition_use_across_modules(client: LanguageClient):
+    """
+    Ensure that go-to-definition works on symbols that reference other modules
+    """
+
+    fileA = """
+            module A {
+              var x = 42;
+            }
+            """
+    fileB = """
+            module B {
+              use A;
+              var y = x;
+            }
+            """
+
+    async def check(docs):
+        docA = docs("A")
+        docB = docs("B")
+
+        await check_goto_decl_def_module(client, docB, pos((1, 6)), docA)
+        await check_goto_decl_def(client, docB, pos((2, 10)), (docA, pos((1, 6))))
+
+    async with source_files(client, A=fileA, B=fileB) as docs:
+        await check(docs)
+
+    async with unrelated_source_files(client, A=fileA, B=fileB) as docs:
+        await check(docs)
+
 
 @pytest.mark.asyncio
 async def test_go_to_definition_standard_rename(client: LanguageClient):