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Added pow, var_decl, fn_decl, fn_call unit tests for the parser.

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This commit is contained in:
PaddiM8 2020-06-05 16:18:29 +02:00
parent 7125b18853
commit 3cbf4e5b4a
1 changed files with 117 additions and 5 deletions
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122
kalk/src/parser.rs
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@ -310,12 +310,19 @@ fn is_at_end(context: &mut Context) -> bool {
mod tests {
use super::*;
use crate::lexer::{Token, TokenKind::*};
use test_case::test_case;
fn parse(tokens: Vec<Token>) -> Stmt {
fn parse_with_context(context: &mut Context, tokens: Vec<Token>) -> Result<Stmt, String> {
context.tokens = tokens;
parse_stmt(context)
}
fn parse(tokens: Vec<Token>) -> Result<Stmt, String> {
let mut context = Context::new();
context.tokens = tokens;
parse_stmt(&mut context).unwrap()
parse_stmt(&mut context)
}
fn token(kind: TokenKind, value: &str) -> Token {
@ -345,11 +352,11 @@ mod tests {
// x
let tokens = vec![token(Identifier, "x"), token(EOF, "")];
assert_eq!(parse(tokens), Stmt::Expr(var("x")));
assert_eq!(parse(tokens).unwrap(), Stmt::Expr(var("x")));
}
#[test]
fn test_precedence() {
fn test_binary() {
// 1+2*(3-4/5)
let tokens = vec![
token(Literal, "1"),
@ -366,7 +373,7 @@ mod tests {
];
assert_eq!(
parse(tokens),
parse(tokens).unwrap(),
Stmt::Expr(binary(
literal("1"),
Plus,
@ -382,4 +389,109 @@ mod tests {
))
);
}
#[test_case(Star, Plus)]
fn test_pow(op1: TokenKind, op2: TokenKind) {
let tokens = vec![
token(Literal, "1"),
token(op1.clone(), ""),
token(Literal, "2"),
token(Power, ""),
token(Literal, "3"),
token(Power, ""),
token(Literal, "4"),
token(op2, ""),
token(Literal, "5"),
];
assert_eq!(
parse(tokens).unwrap(),
Stmt::Expr(binary(
binary(
literal("1"),
op1,
binary(
literal("2"),
Power,
binary(literal("3"), Power, literal("4")),
),
),
Plus,
literal("5")
)),
);
}
#[test]
fn test_var_decl() {
let tokens = vec![
token(Identifier, "x"),
token(Equals, ""),
token(Literal, "1"),
token(Plus, ""),
token(Literal, "2"),
];
assert_eq!(
parse(tokens).unwrap(),
Stmt::VarDecl(String::from("x"), binary(literal("1"), Plus, literal("2")))
);
}
#[test]
fn test_fn_decl() {
let tokens = vec![
token(Identifier, "f"),
token(OpenParenthesis, ""),
token(Identifier, "x"),
token(ClosedParenthesis, ""),
token(Equals, ""),
token(Literal, "1"),
token(Plus, ""),
token(Literal, "2"),
];
assert_eq!(
parse(tokens).unwrap(),
Stmt::FnDecl(
String::from("f"),
vec![String::from("x")],
binary(literal("1"), Plus, literal("2"))
)
);
}
#[test]
fn test_fn_call() {
let tokens = vec![
token(Identifier, "f"),
token(OpenParenthesis, ""),
token(Literal, "1"),
token(Plus, ""),
token(Literal, "2"),
token(ClosedParenthesis, ""),
token(Plus, ""),
token(Literal, "3"),
];
let mut context = Context::new();
// Add the function to the symbol table first, in order to prevent errors.
context.symbol_table.set(
"f()",
Stmt::FnDecl(String::from("f"), vec![String::from("x")], literal("1")),
);
assert_eq!(
parse_with_context(&mut context, tokens).unwrap(),
Stmt::Expr(binary(
Box::new(Expr::FnCall(
String::from("f"),
vec![*binary(literal("1"), Plus, literal("2"))]
)),
Plus,
literal("3")
))
);
}
}