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test(str): add regression test for isprintable() unicode 15 chars, #7766

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Merged
youknowone merged 1 commit into from
May 4, 2026
+20 −0
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test(str): add regression test for isprintable() unicode 15 chars, #7766

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20 changes: 20 additions & 0 deletions crates/vm/src/builtins/str.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2723,4 +2723,24 @@ mod tests {
assert_eq!("TypeError", &*translated.unwrap_err().class().name(),);
})
}

#[test]
fn str_isprintable_unicode15() {
// Regression test for https://github.com/RustPython/RustPython/issues/7525
// At the time of the issue, RustPython used unic_ucd_category which had
// outdated Unicode data, causing U+0B55 to be misclassified as Unassigned.
// Now fixed by migrating to icu_properties with up-to-date Unicode data.

// Characters that should be printable
assert!(PyStr::from("\u{0B55}").isprintable());
assert!(PyStr::from("A").isprintable());
assert!(PyStr::from(" ").isprintable());
assert!(PyStr::from("").isprintable());

// Characters that should NOT be printable
assert!(!PyStr::from("\x00").isprintable());
assert!(!PyStr::from("\u{200B}").isprintable());
assert!(!PyStr::from("\u{E000}").isprintable());
assert!(!PyStr::from("\u{00A0}").isprintable());
}
}