feat: handle workspace config event (#91)

* feat: handle workspace config event

* Fix linter errors

---------

Co-authored-by: Regen <regen100@users.noreply.github.com>

tests/test_server.py

@@ -1,3 +1,4 @@
+import time
 from concurrent import futures
 from pathlib import Path
 from typing import Optional, Tuple
@@ -9,11 +10,13 @@ from lsprotocol.types import (
     TEXT_DOCUMENT_DID_OPEN,
     TEXT_DOCUMENT_FORMATTING,
     TEXT_DOCUMENT_HOVER,
+    WORKSPACE_DID_CHANGE_CONFIGURATION,
     ClientCapabilities,
     CompletionContext,
     CompletionList,
     CompletionParams,
     CompletionTriggerKind,
+    DidChangeConfigurationParams,
     DidOpenTextDocumentParams,
     DocumentFormattingParams,
     FormattingOptions,
@@ -95,6 +98,30 @@ def test_initialize(
     assert server._api is not None
 
 
+def test_workspace_did_change_configuration(
+    client_server: Tuple[LanguageServer, CMakeLanguageServer], datadir: Path
+) -> None:
+    client, server = client_server
+
+    _init(client, datadir)
+
+    old_api = server._api
+
+    client.lsp.notify(
+        WORKSPACE_DID_CHANGE_CONFIGURATION,
+        DidChangeConfigurationParams(
+            settings={"initialization_options": {"buildDirectory": "c_build"}}
+        ),
+    )
+
+    start = time.monotonic()
+    while server._api is old_api and (time.monotonic() - start) < CALL_TIMEOUT:
+        time.sleep(0.1)
+
+    assert server._api is not None
+    assert server._api._build.as_posix() == "c_build"
+
+
 @pytest.mark.parametrize(
     "context", [CompletionContext(trigger_kind=CompletionTriggerKind.Invoked), None]
 )