Add test files

tests/test_converter.py

@@ -0,0 +1,55 @@
+"""Tests for the converter module."""
+
+import pytest
+
+from regex_humanizer.converter import convert_to_english, generate_description
+
+
+class TestConvertToEnglish:
+    def test_convert_literal(self):
+        result = convert_to_english("hello")
+        assert "hello" in result.lower() or "letter" in result.lower()
+
+    def test_convert_character_class(self):
+        result = convert_to_english("[abc]")
+        assert "any" in result.lower() or "character" in result.lower()
+
+    def test_convert_inverted_class(self):
+        result = convert_to_english("[^abc]")
+        assert "except" in result.lower()
+
+    def test_convert_quantifier_star(self):
+        result = convert_to_english("a*")
+        assert "zero" in result.lower() or "more" in result.lower()
+
+    def test_convert_quantifier_plus(self):
+        result = convert_to_english("a+")
+        assert "one" in result.lower() or "more" in result.lower()
+
+    def test_convert_quantifier_question(self):
+        result = convert_to_english("a?")
+        assert "optionally" in result.lower() or "zero" in result.lower()
+
+    def test_convert_anchors(self):
+        result = convert_to_english("^start$")
+        assert "start" in result.lower() and "end" in result.lower()
+
+    def test_convert_alternation(self):
+        result = convert_to_english("a|b")
+        assert "or" in result.lower()
+
+    def test_convert_group(self):
+        result = convert_to_english("(abc)")
+        assert "group" in result.lower()
+
+    def test_convert_special_sequence_digit(self):
+        result = convert_to_english(r"\d")
+        assert "digit" in result.lower()
+
+    def test_convert_special_sequence_word(self):
+        result = convert_to_english(r"\w")
+        assert "word" in result.lower()
+
+    def test_convert_email_pattern(self):
+        result = convert_to_english(r"^\w+@[a-z]+\.[a]+$")
+        assert "start" in result.lower() and "end" in result.lower()