111 lines
2.9 KiB
Rust
111 lines
2.9 KiB
Rust
use rhai::{Engine, EvalAltResult, LexError, ParseErrorType, INT};
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#[test]
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fn test_tokens_disabled() {
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let mut engine = Engine::new();
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engine.disable_symbol("if"); // disable the 'if' keyword
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assert!(matches!(
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*engine
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.compile("let x = if true { 42 } else { 0 };")
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.expect_err("should error")
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.0,
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ParseErrorType::Reserved(err) if err == "if"
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));
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engine.disable_symbol("+="); // disable the '+=' operator
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assert_eq!(
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*engine
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.compile("let x = 40 + 2; x += 1;")
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.expect_err("should error")
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.0,
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ParseErrorType::UnknownOperator("+=".to_string())
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);
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assert!(matches!(
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*engine.compile("let x = += 0;").expect_err("should error").0,
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ParseErrorType::BadInput(LexError::UnexpectedInput(err)) if err == "+="
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));
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}
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#[test]
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fn test_tokens_custom_operator_identifiers() -> Result<(), Box<EvalAltResult>> {
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let mut engine = Engine::new();
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// Register a custom operator called `foo` and give it
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// a precedence of 160 (i.e. between +|- and *|/).
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engine.register_custom_operator("foo", 160).unwrap();
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// Register a binary function named `foo`
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engine.register_fn("foo", |x: INT, y: INT| (x * y) - (x + y));
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assert_eq!(
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engine.eval_expression::<INT>("1 + 2 * 3 foo 4 - 5 / 6")?,
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15
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);
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#[cfg(not(feature = "no_function"))]
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assert_eq!(
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engine.eval::<INT>(
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"
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fn foo(x, y) { y - x }
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1 + 2 * 3 foo 4 - 5 / 6
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"
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)?,
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-1
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);
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Ok(())
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}
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#[test]
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fn test_tokens_custom_operator_symbol() -> Result<(), Box<EvalAltResult>> {
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let mut engine = Engine::new();
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// Register a custom operator `#` and give it
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// a precedence of 160 (i.e. between +|- and *|/).
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engine.register_custom_operator("#", 160).unwrap();
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// Register a binary function named `#`
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engine.register_fn("#", |x: INT, y: INT| (x * y) - (x + y));
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assert_eq!(engine.eval_expression::<INT>("1 + 2 * 3 # 4 - 5 / 6")?, 15);
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// Register a custom operator named `=>`
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assert!(engine.register_custom_operator("=>", 160).is_err());
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engine.disable_symbol("=>");
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engine.register_custom_operator("=>", 160).unwrap();
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engine.register_fn("=>", |x: INT, y: INT| (x * y) - (x + y));
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assert_eq!(engine.eval_expression::<INT>("1 + 2 * 3 => 4 - 5 / 6")?, 15);
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Ok(())
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}
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#[test]
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fn test_tokens_unicode_xid_ident() -> Result<(), Box<EvalAltResult>> {
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let engine = Engine::new();
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let result = engine.eval::<INT>(
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"
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fn すべての答え() { 42 }
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すべての答え()
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",
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);
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#[cfg(feature = "unicode-xid-ident")]
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assert_eq!(result?, 42);
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#[cfg(not(feature = "unicode-xid-ident"))]
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assert!(result.is_err());
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let result = engine.eval::<INT>(
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"
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fn _1() { 1 }
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_1()
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",
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);
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assert!(result.is_err());
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Ok(())
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}
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