Use parse_virtual instead of creating virtual file (#2826)

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Closes #2357

crates/snforge-scarb-plugin/src/parse.rs

@@ -1,33 +1,24 @@
 use crate::attributes::{AttributeInfo, ErrorExt};
-use cairo_lang_diagnostics::DiagnosticsBuilder;
-use cairo_lang_filesystem::ids::{FileKind, FileLongId, VirtualFile};
 use cairo_lang_macro::Diagnostic;
-use cairo_lang_parser::{parser::Parser, utils::SimpleParserDatabase};
+use cairo_lang_parser::utils::SimpleParserDatabase;
+use cairo_lang_syntax::node::ast::SyntaxFile;
 use cairo_lang_syntax::node::{
     ast::{FunctionWithBody, ModuleItem, OptionArgListParenthesized},
     db::SyntaxGroup,
     helpers::QueryAttrs,
+    TypedSyntaxNode,
 };
 use cairo_lang_utils::Upcast;
 use indoc::formatdoc;
-use std::sync::Arc;
 
 pub fn parse<T: AttributeInfo>(
     code: &str,
 ) -> Result<(SimpleParserDatabase, FunctionWithBody), Diagnostic> {
     let simple_db = SimpleParserDatabase::default();
-    let code = Arc::new(code.to_string());
+    let (parsed_node, _diagnostics) = simple_db.parse_virtual_with_diagnostics(code);
+
     let db: &dyn SyntaxGroup = simple_db.upcast();
-    // TODO(#2357): Use `db.parse_virtual` here instead of creating the virtual file manually
-    let virtual_file = db.intern_file(FileLongId::Virtual(VirtualFile {
-        parent: None,
-        name: "test_function".into(),
-        content: Arc::from(code.as_str()),
-        code_mappings: Default::default(),
-        kind: FileKind::Module,
-    }));
-    let mut diagnostics = DiagnosticsBuilder::default();
-    let elements = Parser::parse_file(&simple_db, &mut diagnostics, virtual_file, code.as_str())
+    let elements = SyntaxFile::from_syntax_node(db, parsed_node)
         .items(db)
         .elements(db);