1 files changed, 108 insertions, 0 deletions
diff --git a/tests/lsp/test_formatting.py b/tests/lsp/test_formatting.py
new file mode 100644
index 0000000..0c3fbd6
--- /dev/null
+++ b/tests/lsp/test_formatting.py
@@ -0,0 +1,108 @@
+############################################################################
+# Copyright(c) Open Law Library. All rights reserved.                      #
+# See ThirdPartyNotices.txt in the project root for additional notices.    #
+#                                                                          #
+# Licensed under the Apache License, Version 2.0 (the "License")           #
+# you may not use this file except in compliance with the License.         #
+# You may obtain a copy of the License at                                  #
+#                                                                          #
+#     http: // www.apache.org/licenses/LICENSE-2.0                         #
+#                                                                          #
+# Unless required by applicable law or agreed to in writing, software      #
+# distributed under the License is distributed on an "AS IS" BASIS,        #
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
+# See the License for the specific language governing permissions and      #
+# limitations under the License.                                           #
+############################################################################
+
+from typing import List, Optional
+
+from lsprotocol.types import TEXT_DOCUMENT_FORMATTING
+from lsprotocol.types import (
+    DocumentFormattingOptions,
+    DocumentFormattingParams,
+    FormattingOptions,
+    Position,
+    Range,
+    TextDocumentIdentifier,
+    TextEdit,
+)
+
+from ..conftest import ClientServer
+
+
+class ConfiguredLS(ClientServer):
+    def __init__(self):
+        super().__init__()
+
+        @self.server.feature(
+            TEXT_DOCUMENT_FORMATTING,
+            DocumentFormattingOptions(),
+        )
+        def f(params: DocumentFormattingParams) -> Optional[List[TextEdit]]:
+            if params.text_document.uri == "file://return.list":
+                return [
+                    TextEdit(
+                        range=Range(
+                            start=Position(line=0, character=0),
+                            end=Position(line=1, character=1),
+                        ),
+                        new_text="text",
+                    )
+                ]
+            else:
+                return None
+
+
+@ConfiguredLS.decorate()
+def test_capabilities(client_server):
+    _, server = client_server
+    capabilities = server.server_capabilities
+
+    assert capabilities.document_formatting_provider
+
+
+@ConfiguredLS.decorate()
+def test_document_formatting_return_list(client_server):
+    client, _ = client_server
+    response = client.lsp.send_request(
+        TEXT_DOCUMENT_FORMATTING,
+        DocumentFormattingParams(
+            text_document=TextDocumentIdentifier(uri="file://return.list"),
+            options=FormattingOptions(
+                tab_size=2,
+                insert_spaces=True,
+                trim_trailing_whitespace=True,
+                insert_final_newline=True,
+                trim_final_newlines=True,
+            ),
+        ),
+    ).result()
+
+    assert response
+
+    assert response[0].new_text == "text"
+    assert response[0].range.start.line == 0
+    assert response[0].range.start.character == 0
+    assert response[0].range.end.line == 1
+    assert response[0].range.end.character == 1
+
+
+@ConfiguredLS.decorate()
+def test_document_formatting_return_none(client_server):
+    client, _ = client_server
+    response = client.lsp.send_request(
+        TEXT_DOCUMENT_FORMATTING,
+        DocumentFormattingParams(
+            text_document=TextDocumentIdentifier(uri="file://return.none"),
+            options=FormattingOptions(
+                tab_size=2,
+                insert_spaces=True,
+                trim_trailing_whitespace=True,
+                insert_final_newline=True,
+                trim_final_newlines=True,
+            ),
+        ),
+    ).result()
+
+    assert response is None