Fixed empty strings as input

Author: Gal Ben David

Cargo.toml

@@ -1,14 +1,19 @@
 [package]
 name = "pywordsegment"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Gal Ben David <gal@intsights.com>"]
 edition = "2021"
 description = "Concatenated-word segmentation Python library written in Rust"
 readme = "README.md"
 repository = "https://github.com/intsights/pywordsegment"
 homepage = "https://github.com/intsights/pywordsegment"
 license = "MIT"
-keywords = ["word", "segment", "rust", "pyo3"]
+keywords = [
+    "word",
+    "segment",
+    "rust",
+    "pyo3",
+]
 
 [package.metadata.maturin]
 requires-python = ">=3.7"
@@ -33,7 +38,7 @@ ahash = "0.7"
 rmp-serde = "0.15"
 
 [dependencies.pyo3]
-version = "0.14.5"
+version = "0.15.1"
 features = ["extension-module"]
 
 [profile.release]

pyproject.toml

@@ -13,7 +13,7 @@ sdist-include = [
 
 [tool.poetry]
 name = "pywordsegment"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Gal Ben David <gal@intsights.com>"]
 description = "Concatenated-word segmentation Python library written in Rust"
 readme = "README.md"

src/lib.rs

@@ -107,6 +107,10 @@ impl WordSegmenter {
         let mut result = Vec::with_capacity(text.len());
         let mut candidates = Vec::with_capacity(text.len());
 
+        if text.is_empty() {
+            return result;
+        }
+
         for end in 1..=text.len() {
             let start = end.saturating_sub(MAX_WORD_LEN);
             for split in start..end {

tests/test_pywordsegment.py

@@ -182,6 +182,28 @@ def test_segment_11(
             ],
         )
 
+    def test_segment_12(
+        self,
+    ):
+        self.assertEqual(
+            first=pywordsegment.WordSegmenter.segment(
+                text='',
+            ),
+            second=[],
+        )
+
+    def test_segment_13(
+        self,
+    ):
+        self.assertEqual(
+            first=pywordsegment.WordSegmenter.segment(
+                text='a',
+            ),
+            second=[
+                'a',
+            ],
+        )
+
     def test_exist_as_segment_1(
         self,
     ):