rhai/tests/string.rs

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use rhai::{Engine, EvalAltResult, ImmutableString, RegisterFn, INT};
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#[test]
fn test_string() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
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assert_eq!(
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engine.eval::<String>(r#""Test string: \u2764""#)?,
"Test string: ❤"
);
assert_eq!(
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engine.eval::<String>(r#""Test string: \x58""#)?,
"Test string: X"
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);
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assert_eq!(engine.eval::<String>(r#""\"hello\"""#)?, r#""hello""#);
assert_eq!(engine.eval::<String>(r#""foo" + "bar""#)?, "foobar");
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assert!(engine.eval::<bool>(r#"let y = "hello, world!"; "world" in y"#)?);
assert!(engine.eval::<bool>(r#"let y = "hello, world!"; 'w' in y"#)?);
assert!(!engine.eval::<bool>(r#"let y = "hello, world!"; "hey" in y"#)?);
assert_eq!(engine.eval::<String>(r#""foo" + 123"#)?, "foo123");
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#[cfg(not(feature = "no_object"))]
assert_eq!(engine.eval::<String>("to_string(42)")?, "42");
#[cfg(not(feature = "no_index"))]
assert_eq!(engine.eval::<char>(r#"let y = "hello"; y[1]"#)?, 'e');
#[cfg(not(feature = "no_object"))]
assert_eq!(engine.eval::<INT>(r#"let y = "hello"; y.len"#)?, 5);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>(r#"let y = "hello"; y.clear(); y.len"#)?,
0
);
assert_eq!(engine.eval::<INT>(r#"let y = "hello"; len(y)"#)?, 5);
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#[cfg(not(feature = "no_object"))]
#[cfg(not(feature = "no_index"))]
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assert_eq!(engine.eval::<char>(r#"let y = "hello"; y[y.len-1]"#)?, 'o');
#[cfg(not(feature = "no_float"))]
assert_eq!(engine.eval::<String>(r#""foo" + 123.4556"#)?, "foo123.4556");
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Ok(())
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}
#[cfg(not(feature = "no_object"))]
#[test]
fn test_string_substring() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.sub_string(-1, 2)"#
)?,
"❤❤"
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.sub_string(1, 5)"#
)?,
"❤❤ he"
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.sub_string(1)"#
)?,
"❤❤ hello! ❤❤❤"
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.sub_string(99)"#
)?,
""
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.sub_string(1, -1)"#
)?,
""
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.sub_string(1, 999)"#
)?,
"❤❤ hello! ❤❤❤"
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.crop(1, -1); x"#
)?,
""
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.crop(4, 6); x"#
)?,
"hello!"
);
assert_eq!(
engine.eval::<String>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.crop(1, 999); x"#
)?,
"❤❤ hello! ❤❤❤"
);
assert_eq!(
engine.eval::<INT>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.index_of('\u2764')"#
)?,
0
);
assert_eq!(
engine.eval::<INT>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.index_of('\u2764', 5)"#
)?,
11
);
assert_eq!(
engine.eval::<INT>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.index_of('\u2764', -1)"#
)?,
0
);
assert_eq!(
engine.eval::<INT>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.index_of('\u2764', 999)"#
)?,
-1
);
assert_eq!(
engine.eval::<INT>(
r#"let x = "\u2764\u2764\u2764 hello! \u2764\u2764\u2764"; x.index_of('x')"#
)?,
-1
);
Ok(())
}
#[test]
fn test_string_fn() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
engine.register_fn("foo1", |s: &str| s.len() as INT);
engine.register_fn("foo2", |s: ImmutableString| s.len() as INT);
engine.register_fn("foo3", |s: String| s.len() as INT);
assert_eq!(engine.eval::<INT>(r#"foo1("hello")"#)?, 5);
assert_eq!(engine.eval::<INT>(r#"foo2("hello")"#)?, 5);
assert!(matches!(
*engine.eval::<INT>(r#"foo3("hello")"#).expect_err("should error"),
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EvalAltResult::ErrorFunctionNotFound(ref x, _) if x == "foo3 (&str | ImmutableString)"
));
Ok(())
}