rhai/tests/decrement.rs

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use rhai::{Engine, EvalAltResult, INT};
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#[test]
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fn test_decrement() -> Result<(), EvalAltResult> {
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let mut engine = Engine::new();
assert_eq!(engine.eval::<INT>("let x = 10; x -= 7; x")?, 3);
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assert!(matches!(engine
.eval::<String>(r#"let s = "test"; s -= "ing"; s"#)
.expect_err("expects error"), EvalAltResult::ErrorFunctionNotFound(err, _) if err == "- (string, string)"));
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Ok(())
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}