refactor: change separate tools by category

core/stdlib/src/text/levenshtein-distance/index.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, it } from 'vitest';
+import {levenshteinDistance} from '.';
+  
+describe('levenshteinDistance', () => {
+    it('calculate edit distance between two strings', () => {  
+      // just one substitution I at the beginning
+      expect(levenshteinDistance('islander', 'slander')).toBe(1);
+  
+      // substitution M->K, T->M and add an A to the end
+      expect(levenshteinDistance('mart', 'karma')).toBe(3);
+  
+      // substitution K->S, E->I and insert G at the end
+      expect(levenshteinDistance('kitten', 'sitting')).toBe(3);
+  
+      // should add 4 letters FOOT at the beginning
+      expect(levenshteinDistance('ball', 'football')).toBe(4);
+  
+      // should delete 4 letters FOOT at the beginning
+      expect(levenshteinDistance('football', 'foot')).toBe(4);
+  
+      // needs to substitute the first 5 chars INTEN->EXECU
+      expect(levenshteinDistance('intention', 'execution')).toBe(5);
+    });
+
+    it('handle empty strings', () => {
+      expect(levenshteinDistance('', '')).toBe(0);
+      expect(levenshteinDistance('a', '')).toBe(1);
+      expect(levenshteinDistance('', 'a')).toBe(1);
+      expect(levenshteinDistance('abc', '')).toBe(3);
+      expect(levenshteinDistance('', 'abc')).toBe(3);
+    });
+  });