Fix vscode validation not showing error squiggles (#8500)

Co-authored-by: J. Nick Koston <nick@koston.org>

tests/unit_tests/test_vscode.py

@@ -0,0 +1,125 @@
+import json
+import os
+from unittest.mock import Mock, patch
+
+from esphome import vscode
+
+
+def _run_repl_test(input_data):
+    """Reusable test function for different input scenarios."""
+    input_data.append(_exit())
+    with (
+        patch("builtins.input", side_effect=input_data),
+        patch("sys.stdout") as mock_stdout,
+    ):
+        args = Mock([])
+        args.ace = False
+        args.substitution = None
+        vscode.read_config(args)
+
+        # Capture printed output
+        full_output = "".join(call[0][0] for call in mock_stdout.write.call_args_list)
+        return full_output.strip().split("\n")
+
+
+def _validate(file_path: str):
+    return json.dumps({"type": "validate", "file": file_path})
+
+
+def _file_response(data: str):
+    return json.dumps({"type": "file_response", "content": data})
+
+
+def _read_file(file_path: str):
+    return json.dumps({"type": "read_file", "path": file_path})
+
+
+def _exit():
+    return json.dumps({"type": "exit"})
+
+
+RESULT_NO_ERROR = '{"type": "result", "yaml_errors": [], "validation_errors": []}'
+
+
+def test_multi_file():
+    source_path = os.path.join("dir_path", "x.yaml")
+    output_lines = _run_repl_test(
+        [
+            _validate(source_path),
+            # read_file x.yaml
+            _file_response("""esphome:
+  name: test1
+esp8266:
+  board: !secret my_secret_board
+"""),
+            # read_file secrets.yaml
+            _file_response("""my_secret_board: esp1f"""),
+        ]
+    )
+
+    expected_lines = [
+        _read_file(source_path),
+        _read_file(os.path.join("dir_path", "secrets.yaml")),
+        RESULT_NO_ERROR,
+    ]
+
+    assert output_lines == expected_lines
+
+
+def test_shows_correct_range_error():
+    source_path = os.path.join("dir_path", "x.yaml")
+    output_lines = _run_repl_test(
+        [
+            _validate(source_path),
+            # read_file x.yaml
+            _file_response("""esphome:
+  name: test1
+esp8266:
+  broad: !secret my_secret_board        # typo here
+"""),
+            # read_file secrets.yaml
+            _file_response("""my_secret_board: esp1f"""),
+        ]
+    )
+
+    assert len(output_lines) == 3
+    error = json.loads(output_lines[2])
+    validation_error = error["validation_errors"][0]
+    assert validation_error["message"].startswith("[broad] is an invalid option for")
+    range = validation_error["range"]
+    assert range["document"] == source_path
+    assert range["start_line"] == 3
+    assert range["start_col"] == 2
+    assert range["end_line"] == 3
+    assert range["end_col"] == 7
+
+
+def test_shows_correct_loaded_file_error():
+    source_path = os.path.join("dir_path", "x.yaml")
+    output_lines = _run_repl_test(
+        [
+            _validate(source_path),
+            # read_file x.yaml
+            _file_response("""esphome:
+  name: test1
+
+packages:
+  board: !include .pkg.esp8266.yaml
+"""),
+            # read_file .pkg.esp8266.yaml
+            _file_response("""esp8266:
+  broad: esp1f # typo here
+"""),
+        ]
+    )
+
+    assert len(output_lines) == 3
+    error = json.loads(output_lines[2])
+    validation_error = error["validation_errors"][0]
+    assert validation_error["message"].startswith("[broad] is an invalid option for")
+    range = validation_error["range"]
+    assert range["document"] == os.path.join("dir_path", ".pkg.esp8266.yaml")
+    assert range["start_line"] == 1
+    assert range["start_col"] == 2
+    assert range["end_line"] == 1
+    assert range["end_col"] == 7