Fixed diagnostics files uri handling, added low-level tests

test/solidlsp/zig/test_zig_basic.py

@@ -14,6 +14,7 @@ from solidlsp import SolidLanguageServer
 from solidlsp.ls_config import Language
 from solidlsp.ls_types import SymbolKind
 from test.solidlsp.conftest import format_symbol_for_assert, has_malformed_name, request_all_symbols
+from test.solidlsp.util.diagnostics import assert_file_diagnostics
 
 
 @pytest.mark.zig
@@ -355,3 +356,12 @@ class TestZigLanguageServer:
                 f"Found malformed symbols: {[format_symbol_for_assert(sym) for sym in malformed_symbols]}",
                 pytrace=False,
             )
+
+    @pytest.mark.parametrize("language_server", [Language.ZIG], indirect=True)
+    def test_file_diagnostics(self, language_server: SolidLanguageServer) -> None:
+        assert_file_diagnostics(
+            language_server,
+            "src/diagnostics_sample.zig",
+            (),
+            min_count=1,
+        )