From 180892830d0655eb4c6bd4ccea1ce0328411ea89 Mon Sep 17 00:00:00 2001
From: sumanjeet0012 <sumanjeet0012@gmail.com>
Date: Mon, 13 Jul 2026 14:31:05 +0530
Subject: [PATCH 1/3] test: add fuzz testing using hypothesis

---
 pyproject.toml     |  1 +
 tests/test_fuzz.py | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 tests/test_fuzz.py

diff --git a/pyproject.toml b/pyproject.toml
index 01f775d..da7b0f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,6 +38,7 @@ dev = [
     "Sphinx>=5.0.0",
     "build>=0.9.0",
     "bump-my-version>=1.2.0",
+    "hypothesis",
     "mypy",
     "pre-commit",
     "pytest",
diff --git a/tests/test_fuzz.py b/tests/test_fuzz.py
new file mode 100644
index 0000000..4152821
--- /dev/null
+++ b/tests/test_fuzz.py
@@ -0,0 +1,30 @@
+from hypothesis import given, strategies as st, settings
+from multibase import decode, encode, ENCODINGS
+
+@given(st.binary(max_size=200))
+@settings(max_examples=1000)
+def test_decode_never_crashes(data):
+    """decode() should raise an exception, not crash."""
+    try:
+        decode(data)
+    except Exception:
+        pass  # Any exception is fine, just no crashes
+
+@given(st.text(max_size=200))
+@settings(max_examples=1000)
+def test_decode_string_never_crashes(data):
+    try:
+        decode(data)
+    except Exception:
+        pass
+
+@given(st.binary(min_size=1, max_size=100))
+@settings(max_examples=500)
+def test_roundtrip_never_crashes(data):
+    """encode then decode should never crash."""
+    for enc in ENCODINGS:
+        try:
+            encoded = encode(enc.encoding, data)
+            decode(encoded)
+        except Exception:
+            pass

From 4cc5d292da7e0b12bdfab1361f02284e23a81776 Mon Sep 17 00:00:00 2001
From: sumanjeet0012 <sumanjeet0012@gmail.com>
Date: Mon, 13 Jul 2026 19:10:07 +0530
Subject: [PATCH 2/3] style: fix formatting for fuzz tests

---
 tests/test_fuzz.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tests/test_fuzz.py b/tests/test_fuzz.py
index 4152821..8717505 100644
--- a/tests/test_fuzz.py
+++ b/tests/test_fuzz.py
@@ -1,5 +1,8 @@
-from hypothesis import given, strategies as st, settings
-from multibase import decode, encode, ENCODINGS
+from hypothesis import given, settings
+from hypothesis import strategies as st
+
+from multibase import ENCODINGS, decode, encode
+
 
 @given(st.binary(max_size=200))
 @settings(max_examples=1000)
@@ -10,6 +13,7 @@ def test_decode_never_crashes(data):
     except Exception:
         pass  # Any exception is fine, just no crashes
 
+
 @given(st.text(max_size=200))
 @settings(max_examples=1000)
 def test_decode_string_never_crashes(data):
@@ -18,6 +22,7 @@ def test_decode_string_never_crashes(data):
     except Exception:
         pass
 
+
 @given(st.binary(min_size=1, max_size=100))
 @settings(max_examples=500)
 def test_roundtrip_never_crashes(data):

From d4438246e3d6a8cd97c1bd6afb42274260efb7d2 Mon Sep 17 00:00:00 2001
From: sumanjeet0012 <sumanjeet0012@gmail.com>
Date: Sat, 24 Oct 2026 12:42:53 +0530
Subject: [PATCH 3/3] Add newsfragment for #43
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>
---
 newsfragments/43.internal.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 newsfragments/43.internal.rst

diff --git a/newsfragments/43.internal.rst b/newsfragments/43.internal.rst
new file mode 100644
index 0000000..c198829
--- /dev/null
+++ b/newsfragments/43.internal.rst
@@ -0,0 +1 @@
+Add Hypothesis-based fuzz tests that exercise the decoder with arbitrary binary and text input.