feat: __repr__ shows the pattern-so-far on the builder

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/builder/repr.test.py b/tests/builder/repr.test.py
new file mode 100644
index 0000000..278f40b
--- /dev/null
+++ b/tests/builder/repr.test.py
@@ -0,0 +1,31 @@
+"""Tests for :meth:`BuilderCore.__repr__` on :class:`RegexBuilder` and :class:`Pattern`."""
+
+from edify import Pattern, RegexBuilder
+
+
+def test_repr_of_a_fresh_regex_builder_shows_the_empty_non_capturing_group():
+    assert repr(RegexBuilder()) == "<RegexBuilder '(?:)'>"
+
+
+def test_repr_of_a_fresh_pattern_shows_the_empty_non_capturing_group():
+    assert repr(Pattern()) == "<Pattern '(?:)'>"
+
+
+def test_repr_of_a_regex_builder_shows_the_pattern_so_far():
+    builder = RegexBuilder().start_of_input().exactly(4).digit().end_of_input()
+    assert repr(builder) == "<RegexBuilder '^\\\\d{4}$'>"
+
+
+def test_repr_of_a_pattern_shows_the_pattern_so_far():
+    pattern = Pattern().one_or_more().word()
+    assert repr(pattern) == "<Pattern '\\\\w+'>"
+
+
+def test_repr_of_a_builder_with_open_frames_shows_the_unclosed_marker():
+    builder = RegexBuilder().any_of().string("cat")
+    assert repr(builder) == "<RegexBuilder '<unclosed>'>"
+
+
+def test_repr_uses_the_concrete_class_name_not_the_base():
+    assert repr(RegexBuilder()).startswith("<RegexBuilder ")
+    assert repr(Pattern()).startswith("<Pattern ")