feat: 添加标准测试
This commit is contained in:
0264408
+744
-1
@@ -552,6 +552,12 @@ impl Parser {
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}
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fn synchronize(&mut self) {
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// Always consume at least one token to guarantee forward progress,
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// preventing infinite loops when previous() is already a semicolon.
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if !self.is_at_end() {
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self.advance();
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}
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while !self.is_at_end() {
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if self.current > 0 && matches!(self.previous().kind, TokenKind::Semicolon) {
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return;
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@@ -572,4 +578,741 @@ impl Parser {
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}
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}
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}
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}
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}
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// ========================================================================
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// Tests
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// ========================================================================
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::lexer::Lexer;
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/// Helper: lex + parse, return (stmts, errors).
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fn parse(input: &str) -> (Vec<Stmt>, Vec<RuntimeError>) {
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let (tokens, _) = Lexer::new(input).tokenize();
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Parser::new(tokens).parse()
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}
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/// Helper: lex + parse single expression (wraps in `let _ = <expr>;`).
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fn parse_expr(input: &str) -> Expr {
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let (stmts, errors) = parse(&format!("let __x = {};", input));
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assert!(errors.is_empty(), "Parse errors: {:?}", errors);
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match &stmts[0] {
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Stmt::Let { initializer, .. } => initializer.clone(),
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_ => panic!("Expected Let statement"),
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}
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}
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/// Helper: lex + parse single statement.
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fn parse_stmt(input: &str) -> Stmt {
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let (stmts, errors) = parse(input);
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assert!(errors.is_empty(), "Parse errors: {:?}", errors);
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assert_eq!(stmts.len(), 1);
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stmts[0].clone()
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}
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// ----- literals -----
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#[test]
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fn parse_number() {
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match parse_expr("42") {
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Expr::Literal(Literal::Number(42.0)) => {}
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e => panic!("Expected Number(42.0), got {:?}", e),
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}
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}
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#[test]
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fn parse_float() {
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match parse_expr("3.14") {
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Expr::Literal(Literal::Number(n)) => assert!((n - 3.14).abs() < 0.001),
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e => panic!("Expected Number, got {:?}", e),
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}
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}
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#[test]
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fn parse_string() {
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match parse_expr("\"hello\"") {
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Expr::Literal(Literal::String(s)) => assert_eq!(s, "hello"),
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e => panic!("Expected String, got {:?}", e),
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}
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}
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#[test]
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fn parse_bool_true() {
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match parse_expr("true") {
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Expr::Literal(Literal::Bool(true)) => {}
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e => panic!("Expected Bool(true), got {:?}", e),
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}
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}
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#[test]
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fn parse_bool_false() {
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match parse_expr("false") {
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Expr::Literal(Literal::Bool(false)) => {}
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e => panic!("Expected Bool(false), got {:?}", e),
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}
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}
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#[test]
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fn parse_nil() {
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match parse_expr("nil") {
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Expr::Literal(Literal::Nil) => {}
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e => panic!("Expected Nil, got {:?}", e),
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}
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}
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// ----- variables -----
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#[test]
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fn parse_variable() {
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match parse_expr("x") {
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Expr::Variable(name) => assert_eq!(name, "x"),
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e => panic!("Expected Variable, got {:?}", e),
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}
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}
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// ----- unary -----
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#[test]
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fn parse_negation() {
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match parse_expr("-5") {
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Expr::Unary { op: UnaryOp::Negate, right } => {
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match *right {
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Expr::Literal(Literal::Number(5.0)) => {}
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e => panic!("Expected Number(5), got {:?}", e),
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}
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}
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e => panic!("Expected Unary(Negate, Number), got {:?}", e),
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}
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}
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#[test]
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fn parse_not() {
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match parse_expr("!true") {
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Expr::Unary { op: UnaryOp::Not, right } => {
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match *right {
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Expr::Literal(Literal::Bool(true)) => {}
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e => panic!("Expected Bool(true), got {:?}", e),
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}
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}
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e => panic!("Expected Unary(Not, Bool), got {:?}", e),
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}
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}
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#[test]
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fn parse_double_negation() {
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match parse_expr("!!true") {
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Expr::Unary { op: UnaryOp::Not, right } => {
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match *right {
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Expr::Unary { op: UnaryOp::Not, .. } => {}
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e => panic!("Expected nested Unary, got {:?}", e),
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}
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}
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e => panic!("Expected Unary(Not, ...), got {:?}", e),
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}
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}
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// ----- binary precedence -----
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#[test]
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fn parse_addition() {
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match parse_expr("1 + 2") {
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Expr::Binary { op: BinaryOp::Add, left, right } => {
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match (*left, *right) {
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(Expr::Literal(Literal::Number(1.0)), Expr::Literal(Literal::Number(2.0))) => {}
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e => panic!("Expected (1, 2), got {:?}", e),
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}
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}
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e => panic!("Expected Binary(Add), got {:?}", e),
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}
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}
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#[test]
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fn parse_multiplication_precedence() {
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// 1 + 2 * 3 => 1 + (2 * 3)
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match parse_expr("1 + 2 * 3") {
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Expr::Binary { op: BinaryOp::Add, left, right } => {
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match *left {
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Expr::Literal(Literal::Number(1.0)) => {}
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e => panic!("Expected left=1, got {:?}", e),
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}
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match *right {
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Expr::Binary { op: BinaryOp::Mul, .. } => {}
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e => panic!("Expected right=Binary(Mul), got {:?}", e),
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}
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}
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e => panic!("Expected Binary(Add), got {:?}", e),
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}
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}
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#[test]
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fn parse_modulo() {
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match parse_expr("7 % 3") {
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Expr::Binary { op: BinaryOp::Mod, .. } => {}
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e => panic!("Expected Binary(Mod), got {:?}", e),
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}
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}
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// ----- comparison -----
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#[test]
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fn parse_comparison_chain() {
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// a < b == c
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match parse_expr("a < b == c") {
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Expr::Binary { op: BinaryOp::Equal, left, right } => {
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match *left {
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Expr::Binary { op: BinaryOp::Less, .. } => {}
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e => panic!("Expected left=Binary(Less), got {:?}", e),
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}
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match *right {
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Expr::Variable(name) => assert_eq!(name, "c"),
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e => panic!("Expected right=Variable(c), got {:?}", e),
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}
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}
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e => panic!("Expected Binary(Equal), got {:?}", e),
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}
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}
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// ----- logical -----
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#[test]
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fn parse_logical_and() {
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match parse_expr("true && false") {
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Expr::Logical { op: LogicalOp::And, .. } => {}
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e => panic!("Expected Logical(And), got {:?}", e),
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}
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}
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#[test]
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fn parse_logical_or() {
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match parse_expr("true || false") {
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Expr::Logical { op: LogicalOp::Or, .. } => {}
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e => panic!("Expected Logical(Or), got {:?}", e),
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}
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}
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#[test]
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fn parse_logical_precedence() {
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// a || b && c => a || (b && c)
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match parse_expr("a || b && c") {
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Expr::Logical { op: LogicalOp::Or, left, right } => {
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match *left {
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Expr::Variable(name) => assert_eq!(name, "a"),
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e => panic!("Expected left=a, got {:?}", e),
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}
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match *right {
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Expr::Logical { op: LogicalOp::And, .. } => {}
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e => panic!("Expected right=Logical(And), got {:?}", e),
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}
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}
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e => panic!("Expected Logical(Or), got {:?}", e),
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}
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}
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// ----- assignment -----
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#[test]
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fn parse_simple_assignment() {
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match parse_expr("x = 5") {
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Expr::Assign { name, op: AssignOp::Equal, value } => {
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assert_eq!(name, "x");
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match *value {
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Expr::Literal(Literal::Number(5.0)) => {}
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e => panic!("Expected Number(5), got {:?}", e),
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}
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}
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e => panic!("Expected Assign, got {:?}", e),
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}
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}
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#[test]
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fn parse_compound_assignment() {
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match parse_expr("x += 2") {
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Expr::Assign { name, op: AssignOp::PlusEqual, value } => {
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assert_eq!(name, "x");
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match *value {
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Expr::Literal(Literal::Number(2.0)) => {}
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e => panic!("Expected Number(2), got {:?}", e),
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}
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}
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e => panic!("Expected Assign(PlusEqual), got {:?}", e),
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}
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}
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#[test]
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fn parse_all_compound_ops() {
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let ops = [
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("+=", AssignOp::PlusEqual),
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("-=", AssignOp::MinusEqual),
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("*=", AssignOp::StarEqual),
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("/=", AssignOp::SlashEqual),
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("%=", AssignOp::PercentEqual),
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];
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for (op_str, expected_op) in &ops {
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let expr = parse_expr(&format!("x {} 1", op_str));
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match expr {
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Expr::Assign { op, .. } => {
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assert_eq!(std::mem::discriminant(&op), std::mem::discriminant(expected_op));
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}
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e => panic!("Expected Assign for '{}', got {:?}", op_str, e),
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}
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}
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}
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// ----- property access -----
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#[test]
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fn parse_property_get() {
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match parse_expr("obj.name") {
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Expr::Get { object, name } => {
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match *object {
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Expr::Variable(n) => assert_eq!(n, "obj"),
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e => panic!("Expected Variable(obj), got {:?}", e),
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}
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assert_eq!(name, "name");
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}
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e => panic!("Expected Get, got {:?}", e),
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}
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}
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#[test]
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fn parse_property_set() {
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match parse_expr("obj.name = 5") {
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Expr::Set { object, name, op: AssignOp::Equal, value } => {
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match *object {
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Expr::Variable(n) => assert_eq!(n, "obj"),
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e => panic!("Expected Variable(obj), got {:?}", e),
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}
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assert_eq!(name, "name");
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match *value {
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Expr::Literal(Literal::Number(5.0)) => {}
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e => panic!("Expected Number(5), got {:?}", e),
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}
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}
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e => panic!("Expected Set, got {:?}", e),
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}
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}
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#[test]
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fn parse_chained_property_access() {
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match parse_expr("a.b.c") {
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Expr::Get { object, name } => {
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assert_eq!(name, "c");
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match *object {
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Expr::Get { name: ref inner, .. } => assert_eq!(inner, "b"),
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e => panic!("Expected chained Get, got {:?}", e),
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}
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}
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e => panic!("Expected Get, got {:?}", e),
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}
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}
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// ----- index access -----
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#[test]
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fn parse_index_get() {
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match parse_expr("arr[0]") {
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Expr::IndexGet { array, index } => {
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match *array {
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Expr::Variable(n) => assert_eq!(n, "arr"),
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e => panic!("Expected Variable(arr), got {:?}", e),
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}
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match *index {
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Expr::Literal(Literal::Number(0.0)) => {}
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e => panic!("Expected Number(0), got {:?}", e),
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}
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}
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e => panic!("Expected IndexGet, got {:?}", e),
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}
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}
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#[test]
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fn parse_index_set() {
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match parse_expr("arr[i] = 42") {
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Expr::IndexSet { array, index, op: AssignOp::Equal, value } => {
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match *array {
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Expr::Variable(n) => assert_eq!(n, "arr"),
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e => panic!("Expected Variable(arr), got {:?}", e),
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}
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match *index {
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Expr::Variable(n) => assert_eq!(n, "i"),
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e => panic!("Expected Variable(i), got {:?}", e),
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}
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match *value {
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Expr::Literal(Literal::Number(42.0)) => {}
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e => panic!("Expected Number(42), got {:?}", e),
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}
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}
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e => panic!("Expected IndexSet, got {:?}", e),
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}
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}
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#[test]
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fn parse_nested_index() {
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match parse_expr("a[1][2]") {
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Expr::IndexGet { array, .. } => {
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match *array {
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Expr::IndexGet { .. } => {}
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e => panic!("Expected nested IndexGet, got {:?}", e),
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}
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}
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e => panic!("Expected IndexGet, got {:?}", e),
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}
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}
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// ----- function calls -----
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#[test]
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fn parse_call_no_args() {
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match parse_expr("f()") {
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Expr::Call { callee, arguments } => {
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match *callee {
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Expr::Variable(n) => assert_eq!(n, "f"),
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e => panic!("Expected Variable(f), got {:?}", e),
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}
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assert!(arguments.is_empty());
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}
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e => panic!("Expected Call, got {:?}", e),
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}
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}
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#[test]
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fn parse_call_with_args() {
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match parse_expr("add(1, 2, 3)") {
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Expr::Call { callee, arguments } => {
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match *callee {
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Expr::Variable(n) => assert_eq!(n, "add"),
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e => panic!("Expected Variable(add), got {:?}", e),
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}
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assert_eq!(arguments.len(), 3);
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}
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e => panic!("Expected Call, got {:?}", e),
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}
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}
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#[test]
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fn parse_chained_calls() {
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match parse_expr("f()()") {
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Expr::Call { callee, .. } => {
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match *callee {
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Expr::Call { callee, .. } => {
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match *callee {
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Expr::Variable(n) => assert_eq!(n, "f"),
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e => panic!("Expected Variable(f), got {:?}", e),
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}
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}
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e => panic!("Expected inner Call, got {:?}", e),
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}
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}
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e => panic!("Expected Call, got {:?}", e),
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}
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}
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#[test]
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fn parse_method_style_call() {
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// obj.method()
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match parse_expr("obj.method()") {
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Expr::Call { callee, .. } => {
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match *callee {
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Expr::Get { .. } => {}
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e => panic!("Expected Get, got {:?}", e),
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}
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}
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e => panic!("Expected Call, got {:?}", e),
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}
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}
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// ----- lambda -----
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#[test]
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fn parse_simple_lambda() {
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match parse_expr("fn(x, y) { return x + y; }") {
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Expr::Lambda { params, body } => {
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assert_eq!(params, vec!["x", "y"]);
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assert_eq!(body.len(), 1);
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}
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e => panic!("Expected Lambda, got {:?}", e),
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}
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}
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#[test]
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fn parse_lambda_no_params() {
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match parse_expr("fn() { return 42; }") {
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Expr::Lambda { params, body } => {
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assert!(params.is_empty());
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assert_eq!(body.len(), 1);
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}
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e => panic!("Expected Lambda, got {:?}", e),
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}
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}
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// ----- object literal -----
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#[test]
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fn parse_empty_object() {
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match parse_expr("{}") {
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Expr::ObjectLiteral { properties } => assert!(properties.is_empty()),
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e => panic!("Expected ObjectLiteral, got {:?}", e),
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}
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}
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#[test]
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fn parse_object_with_properties() {
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match parse_expr("{ name: \"aster\", version: 1 }") {
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Expr::ObjectLiteral { properties } => {
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assert_eq!(properties.len(), 2);
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assert_eq!(properties[0].0, "name");
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assert_eq!(properties[1].0, "version");
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}
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e => panic!("Expected ObjectLiteral, got {:?}", e),
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}
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}
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||||
// ----- array literal -----
|
||||
|
||||
#[test]
|
||||
fn parse_empty_array() {
|
||||
match parse_expr("[]") {
|
||||
Expr::ArrayLiteral { elements } => assert!(elements.is_empty()),
|
||||
e => panic!("Expected ArrayLiteral, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_array_with_elements() {
|
||||
match parse_expr("[1, 2, 3]") {
|
||||
Expr::ArrayLiteral { elements } => assert_eq!(elements.len(), 3),
|
||||
e => panic!("Expected ArrayLiteral, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_nested_arrays() {
|
||||
match parse_expr("[[1, 2], [3, 4]]") {
|
||||
Expr::ArrayLiteral { elements } => {
|
||||
assert_eq!(elements.len(), 2);
|
||||
for e in &elements {
|
||||
assert!(matches!(e, Expr::ArrayLiteral { .. }));
|
||||
}
|
||||
}
|
||||
e => panic!("Expected ArrayLiteral, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
// ----- statements -----
|
||||
|
||||
#[test]
|
||||
fn parse_let_statement() {
|
||||
match parse_stmt("let x = 5;") {
|
||||
Stmt::Let { name, initializer } => {
|
||||
assert_eq!(name, "x");
|
||||
assert!(matches!(initializer, Expr::Literal(Literal::Number(5.0))));
|
||||
}
|
||||
e => panic!("Expected Let, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_let_without_semicolon() {
|
||||
// Semicolons are optional
|
||||
match parse_stmt("let x = 5") {
|
||||
Stmt::Let { name, .. } => assert_eq!(name, "x"),
|
||||
e => panic!("Expected Let, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_expression_statement() {
|
||||
match parse_stmt("x;") {
|
||||
Stmt::ExprStmt(Expr::Variable(name)) => assert_eq!(name, "x"),
|
||||
e => panic!("Expected ExprStmt(Variable), got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_if_statement() {
|
||||
match parse_stmt("if (x) { 1; }") {
|
||||
Stmt::If { condition, then_branch, else_branch } => {
|
||||
assert!(matches!(condition, Expr::Variable(_)));
|
||||
assert!(matches!(*then_branch, Stmt::Block(_)));
|
||||
assert!(else_branch.is_none());
|
||||
}
|
||||
e => panic!("Expected If, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_if_else_statement() {
|
||||
match parse_stmt("if (x) { 1; } else { 2; }") {
|
||||
Stmt::If { else_branch, .. } => {
|
||||
assert!(else_branch.is_some());
|
||||
}
|
||||
e => panic!("Expected If with else, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_while_statement() {
|
||||
match parse_stmt("while (x < 10) { x = x + 1; }") {
|
||||
Stmt::While { condition, body } => {
|
||||
assert!(matches!(condition, Expr::Binary { .. }));
|
||||
assert!(matches!(*body, Stmt::Block(_)));
|
||||
}
|
||||
e => panic!("Expected While, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_for_statement() {
|
||||
match parse_stmt("for (let i = 0; i < 10; i = i + 1) { }") {
|
||||
Stmt::For { initializer, condition, step, body } => {
|
||||
assert!(initializer.is_some());
|
||||
assert!(condition.is_some());
|
||||
assert!(step.is_some());
|
||||
assert!(matches!(*body, Stmt::Block(_)));
|
||||
}
|
||||
e => panic!("Expected For, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_for_empty_clauses() {
|
||||
match parse_stmt("for (;;) { }") {
|
||||
Stmt::For { initializer, condition, step, .. } => {
|
||||
assert!(initializer.is_none());
|
||||
assert!(condition.is_none());
|
||||
assert!(step.is_none());
|
||||
}
|
||||
e => panic!("Expected For, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_block() {
|
||||
match parse_stmt("{ let x = 1; x; }") {
|
||||
Stmt::Block(stmts) => assert_eq!(stmts.len(), 2),
|
||||
e => panic!("Expected Block, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_return_statement() {
|
||||
match parse_stmt("return 42;") {
|
||||
Stmt::Return(Some(expr)) => {
|
||||
assert!(matches!(expr, Expr::Literal(Literal::Number(42.0))));
|
||||
}
|
||||
e => panic!("Expected Return(42), got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_return_nil() {
|
||||
match parse_stmt("return;") {
|
||||
Stmt::Return(None) => {}
|
||||
e => panic!("Expected Return(None), got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_break_statement() {
|
||||
match parse_stmt("break;") {
|
||||
Stmt::Break => {}
|
||||
e => panic!("Expected Break, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_continue_statement() {
|
||||
match parse_stmt("continue;") {
|
||||
Stmt::Continue => {}
|
||||
e => panic!("Expected Continue, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_function_declaration() {
|
||||
match parse_stmt("fn add(a, b) { return a + b; }") {
|
||||
Stmt::Function { name, params, body } => {
|
||||
assert_eq!(name, "add");
|
||||
assert_eq!(params, vec!["a", "b"]);
|
||||
assert_eq!(body.len(), 1);
|
||||
}
|
||||
e => panic!("Expected Function, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_function_no_params() {
|
||||
match parse_stmt("fn greet() { print(\"hi\"); }") {
|
||||
Stmt::Function { name, params, .. } => {
|
||||
assert_eq!(name, "greet");
|
||||
assert!(params.is_empty());
|
||||
}
|
||||
e => panic!("Expected Function, got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
// ----- error recovery -----
|
||||
|
||||
#[test]
|
||||
fn error_recovery_skips_past_semicolon() {
|
||||
// First statement is invalid, second should parse fine
|
||||
let (stmts, errors) = parse("let = 5; let y = 10;");
|
||||
assert!(!errors.is_empty(), "Should have parse errors");
|
||||
// Should have at least the second statement
|
||||
assert!(stmts.len() >= 1);
|
||||
// The second statement should be a valid Let for y
|
||||
match &stmts.last().unwrap() {
|
||||
Stmt::Let { name, .. } => assert_eq!(name, "y"),
|
||||
e => panic!("Expected Let(y), got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn error_recovery_at_statement_boundary() {
|
||||
let (stmts, errors) = parse("let x = @@@; let y = 10;");
|
||||
assert!(!errors.is_empty());
|
||||
assert!(stmts.len() >= 1);
|
||||
}
|
||||
|
||||
// ----- parse errors -----
|
||||
|
||||
#[test]
|
||||
fn error_invalid_assignment_target() {
|
||||
let (_stmts, errors) = parse("5 = 10;");
|
||||
assert!(!errors.is_empty());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn error_missing_closing_paren() {
|
||||
let (_stmts, errors) = parse("if (x { 1; }");
|
||||
assert!(!errors.is_empty());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn error_missing_semicolon_after_for_condition() {
|
||||
// for(;;){} is valid — test something actually invalid
|
||||
let (_stmts, _errors) = parse("for (let i = 0 i < 10) { }");
|
||||
assert!(!_errors.is_empty());
|
||||
}
|
||||
|
||||
// ----- parenthesized expression -----
|
||||
|
||||
#[test]
|
||||
fn parse_parenthesized_expression() {
|
||||
match parse_expr("(1 + 2)") {
|
||||
Expr::Binary { op: BinaryOp::Add, .. } => {}
|
||||
e => panic!("Expected Binary(Add), got {:?}", e),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_nested_parentheses() {
|
||||
match parse_expr("((42))") {
|
||||
Expr::Literal(Literal::Number(42.0)) => {}
|
||||
e => panic!("Expected Number(42), got {:?}", e),
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user