1 files changed, 58 insertions, 0 deletions
diff --git a/tests/pattern/classes.test.py b/tests/pattern/classes.test.py
new file mode 100644
index 0000000..de6bfc0
--- /dev/null
+++ b/tests/pattern/classes.test.py
@@ -0,0 +1,58 @@
+"""Tests for the module-level character-class :class:`Pattern` constants."""
+
+import pytest
+
+from edify import (
+    ANY_CHAR,
+    CARRIAGE_RETURN,
+    DIGIT,
+    NEW_LINE,
+    NON_DIGIT,
+    NON_WHITESPACE,
+    NON_WORD,
+    NULL_BYTE,
+    TAB,
+    WHITESPACE,
+    WORD,
+    Pattern,
+)
+
+
+[email protected](
+    ("constant", "expected"),
+    [
+        (ANY_CHAR, "."),
+        (WHITESPACE, "\\s"),
+        (NON_WHITESPACE, "\\S"),
+        (DIGIT, "\\d"),
+        (NON_DIGIT, "\\D"),
+        (WORD, "\\w"),
+        (NON_WORD, "\\W"),
+        (NEW_LINE, "\\n"),
+        (CARRIAGE_RETURN, "\\r"),
+        (TAB, "\\t"),
+        (NULL_BYTE, "\\0"),
+    ],
+)
+def test_character_class_constant_compiles_to_expected_regex(constant, expected):
+    assert constant.to_regex_string() == expected
+
+
+[email protected](
+    "constant",
+    [
+        ANY_CHAR,
+        WHITESPACE,
+        NON_WHITESPACE,
+        DIGIT,
+        NON_DIGIT,
+        WORD,
+        NON_WORD,
+        NEW_LINE,
+        CARRIAGE_RETURN,
+        TAB,
+        NULL_BYTE,
+    ],
+)
+def test_character_class_constant_is_a_pattern(constant):
+    assert isinstance(constant, Pattern)