Return empty iterator for empty string
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@ -62,7 +62,11 @@ impl Segmenter {
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input: &str,
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search: &'a mut Search,
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) -> Result<impl Iterator<Item = &'a str> + ExactSizeIterator, InvalidCharacter> {
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SegmentState::new(Ascii::new(input)?, self, search).run();
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let state = SegmentState::new(Ascii::new(input)?, self, search);
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if !input.is_empty() {
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state.run();
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}
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Ok(search.result.iter().map(|v| v.as_str()))
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}
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@ -3,6 +3,8 @@ use crate::{Search, Segmenter};
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/// Run a segmenter against the built-in test cases
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pub fn run(segmenter: &Segmenter) {
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let mut search = Search::default();
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assert_eq!(segmenter.segment("", &mut search).unwrap().len(), 0);
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let mut success = true;
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for test in TEST_CASES.iter().copied() {
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success &= assert_segments(test, &mut search, segmenter);
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