Add test files

tests/test_examples.py

@@ -0,0 +1,53 @@
+"""Tests for the examples module."""
+
+import pytest
+
+from regex_humanizer.examples import generate_examples, generate_match_examples
+
+
+class TestGenerateExamples:
+    def test_generate_literal_examples(self):
+        examples = generate_examples("hello", count=3)
+        assert len(examples) >= 1
+        assert "hello" in examples
+
+    def test_generate_character_class_examples(self):
+        examples = generate_examples("[abc]", count=5)
+        assert len(examples) > 0
+        for example in examples:
+            assert len(example) == 1
+            assert example in "abc"
+
+    def test_generate_quantifier_examples(self):
+        examples = generate_examples("a*", count=3)
+        assert len(examples) >= 1
+        for example in examples:
+            assert all(c == "a" for c in example)
+
+    def test_generate_digit_examples(self):
+        examples = generate_examples(r"\d+", count=3)
+        assert len(examples) >= 1
+        for example in examples:
+            assert example.isdigit()
+
+    def test_generate_word_examples(self):
+        examples = generate_examples(r"\w+", count=3)
+        assert len(examples) >= 1
+        for example in examples:
+            assert example.replace("_", "").isalnum()
+
+    def test_generate_alternation_examples(self):
+        examples = generate_examples("foo|bar", count=3)
+        assert len(examples) >= 1
+        for example in examples:
+            assert example in ("foo", "bar")
+
+    def test_generate_complex_pattern_examples(self):
+        examples = generate_examples(r"\d{3}-\d{4}", count=3)
+        assert len(examples) >= 1
+        for example in examples:
+            assert "-" in example
+
+    def test_generate_invalid_pattern(self):
+        examples = generate_examples("[unclosed", count=3)
+        assert examples == []