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/// Returns the length of a string in Unicode characters.
///
/// # Arguments
/// * `str_input` - The input string to count characters from
///
/// # Returns
/// * `usize` - The number of Unicode characters in the string
///
/// # Examples
/// ```rust
/// use lowdash::char_length;
///
/// assert_eq!(char_length("hello"), 5);
/// assert_eq!(char_length("🌍world"), 6);
/// assert_eq!(char_length("こんにちは"), 5);
/// ```
pub fn char_length(str_input: &str) -> usize {
str_input.chars().count()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_ascii_string() {
assert_eq!(char_length("hello"), 5);
}
#[test]
fn test_empty_string() {
assert_eq!(char_length(""), 0);
}
#[test]
fn test_unicode_string() {
assert_eq!(char_length("こんにちは"), 5);
}
#[test]
fn test_mixed_string() {
assert_eq!(char_length("hello🌍world"), 11);
}
#[test]
fn test_emoji_string() {
assert_eq!(char_length("✨🌟💫"), 3);
}
#[test]
fn test_whitespace() {
assert_eq!(char_length("a b c"), 5);
}
#[test]
fn test_special_characters() {
assert_eq!(char_length("a\nb\tc"), 5);
}
}