Function open_file

tests/integration/references.rs:100–106

Helper: open a file in the backend by calling update_ast directly and storing the content in open_files so find_references can read it.

(backend: &phpantom_lsp::Backend, uri: &str, content: &str)

/// Helper: open a file in the backend by calling update_ast directly
/// and storing the content in open_files so find_references can read it.
fn open_file(backend: &phpantom_lsp::Backend, uri: &str, content: &str) {
    backend
        .open_files()
        .write()
        .insert(uri.to_string(), Arc::new(content.to_string()));
    backend.update_ast(uri, content);
}

/// Helper to assert no duplicate locations exist in the results.
fn assert_no_duplicates(results: &[tower_lsp::lsp_types::Location], label: &str) {