Fix stateful test fuzzing

deps/check.txt

@@ -4,9 +4,9 @@
 #
 #    pip-compile --annotation-style=line --output-file=deps/check.txt deps/check.in
 #
-anyio==4.10.0             # via starlette
+anyio==4.11.0             # via starlette
 attrs==25.3.0             # via hypothesis, outcome, trio
-black==25.1.0             # via shed
+black==25.9.0             # via shed
 click==8.1.8              # via black
 com2ann==0.3.0            # via shed
 exceptiongroup==1.3.0     # via anyio, hypercorn, hypothesis, pytest, taskgroup, trio
@@ -16,12 +16,12 @@ h2==4.3.0                 # via hypercorn
 hpack==4.1.0              # via h2
 hypercorn==0.17.3         # via -r deps/check.in
 hyperframe==6.1.0         # via h2
-hypothesis==6.138.14      # via -r deps/check.in
+hypothesis==6.140.2       # via -r deps/check.in
 idna==3.10                # via anyio, trio
 iniconfig==2.1.0          # via pytest
-libcst==1.8.2             # via shed
+libcst==1.8.5             # via shed
 mccabe==0.7.0             # via flake8
-mypy==1.17.1              # via -r deps/check.in
+mypy==1.18.2              # via -r deps/check.in
 mypy-extensions==1.1.0    # via black, mypy
 outcome==1.3.0.post0      # via trio
 packaging==25.0           # via black, pytest
@@ -30,24 +30,25 @@ pep8-naming==0.15.1       # via -r deps/check.in
 platformdirs==4.4.0       # via black
 pluggy==1.6.0             # via pytest
 priority==2.0.0           # via hypercorn
-psutil==7.0.0             # via -r deps/check.in
+psutil==7.1.0             # via -r deps/check.in
 pycodestyle==2.14.0       # via flake8
 pyflakes==3.4.0           # via flake8
 pygments==2.19.2          # via pytest
-pytest==8.4.1             # via -r deps/check.in
+pytest==8.4.2             # via -r deps/check.in
+pytokens==0.1.10          # via black
 pyupgrade==3.20.0         # via shed
-pyyaml==6.0.2             # via libcst
-ruff==0.12.11             # via -r deps/check.in, shed
+pyyaml==6.0.3             # via libcst
+ruff==0.13.2              # via -r deps/check.in, shed
 shed==2025.6.1            # via -r deps/check.in
 sniffio==1.3.1            # via anyio, trio
 sortedcontainers==2.4.0   # via hypothesis, sortedcontainers-stubs, trio
 sortedcontainers-stubs==2.4.3  # via -r deps/check.in
-starlette==0.47.3         # via -r deps/check.in
+starlette==0.48.0         # via -r deps/check.in
 taskgroup==0.2.2          # via hypercorn
 tokenize-rt==6.2.0        # via pyupgrade
 tomli==2.2.1              # via black, hypercorn, mypy, pytest
-trio==0.30.0              # via -r deps/check.in
-types-requests==2.32.4.20250809  # via -r deps/check.in
+trio==0.31.0              # via -r deps/check.in
+types-requests==2.32.4.20250913  # via -r deps/check.in
 typing-extensions==4.15.0  # via anyio, black, exceptiongroup, hypercorn, libcst, mypy, sortedcontainers-stubs, starlette, taskgroup
 urllib3==2.5.0            # via types-requests
 wsproto==1.2.0            # via hypercorn

deps/docs.txt

@@ -6,33 +6,33 @@
 #
 accessible-pygments==0.0.5  # via furo
 alabaster==0.7.16         # via sphinx
-anyio==4.10.0             # via starlette
+anyio==4.11.0             # via starlette
 attrs==25.3.0             # via hypothesis, outcome, trio
 babel==2.17.0             # via sphinx
-beautifulsoup4==4.13.5    # via furo
-black==25.1.0             # via hypofuzz (pyproject.toml), hypothesis
+beautifulsoup4==4.14.0    # via furo
+black==25.9.0             # via hypofuzz (pyproject.toml), hypothesis
 certifi==2025.8.3         # via requests
 charset-normalizer==3.4.3  # via requests
 click==8.1.8              # via black, hypothesis
-coverage==7.10.6          # via hypofuzz (pyproject.toml)
+coverage==7.10.7          # via hypofuzz (pyproject.toml)
 docutils==0.21.2          # via myst-parser, pybtex-docutils, sphinx, sphinxcontrib-bibtex
 exceptiongroup==1.3.0     # via anyio, hypercorn, hypothesis, pytest, taskgroup, trio
-furo==2025.7.19           # via -r deps/docs.in
+furo==2025.9.25           # via -r deps/docs.in
 h11==0.16.0               # via hypercorn, wsproto
 h2==4.3.0                 # via hypercorn
 hpack==4.1.0              # via h2
 hypercorn==0.17.3         # via hypofuzz (pyproject.toml)
 hyperframe==6.1.0         # via h2
-hypothesis[cli,watchdog]==6.138.14  # via hypofuzz (pyproject.toml)
+hypothesis[cli,watchdog]==6.140.2  # via hypofuzz (pyproject.toml)
 idna==3.10                # via anyio, requests, trio
 imagesize==1.4.1          # via sphinx
 importlib-metadata==8.7.0  # via pybtex, sphinx, sphinxcontrib-bibtex
 iniconfig==2.1.0          # via pytest
 jinja2==3.1.6             # via myst-parser, sphinx
 latexcodec==3.0.1         # via pybtex
-libcst==1.8.2             # via hypofuzz (pyproject.toml)
+libcst==1.8.5             # via hypofuzz (pyproject.toml)
 markdown-it-py==3.0.0     # via mdit-py-plugins, myst-parser, rich
-markupsafe==3.0.2         # via jinja2
+markupsafe==3.0.3         # via jinja2
 mdit-py-plugins==0.4.2    # via myst-parser
 mdurl==0.1.2              # via markdown-it-py
 mypy-extensions==1.1.0    # via black
@@ -43,12 +43,13 @@ pathspec==0.12.1          # via black
 platformdirs==4.4.0       # via black
 pluggy==1.6.0             # via pytest
 priority==2.0.0           # via hypercorn
-psutil==7.0.0             # via hypofuzz (pyproject.toml)
+psutil==7.1.0             # via hypofuzz (pyproject.toml)
 pybtex==0.25.1            # via pybtex-docutils, sphinxcontrib-bibtex
 pybtex-docutils==1.0.3    # via sphinxcontrib-bibtex
 pygments==2.19.2          # via accessible-pygments, furo, pytest, rich, sphinx
-pytest==8.4.1             # via hypofuzz (pyproject.toml)
-pyyaml==6.0.2             # via libcst, myst-parser, pybtex
+pytest==8.4.2             # via hypofuzz (pyproject.toml)
+pytokens==0.1.10          # via black
+pyyaml==6.0.3             # via libcst, myst-parser, pybtex
 requests==2.32.5          # via sphinx
 rich==14.1.0              # via hypothesis
 sniffio==1.3.1            # via anyio, trio
@@ -64,10 +65,10 @@ sphinxcontrib-htmlhelp==2.1.0  # via sphinx
 sphinxcontrib-jsmath==1.0.1  # via sphinx
 sphinxcontrib-qthelp==2.0.0  # via sphinx
 sphinxcontrib-serializinghtml==2.0.0  # via sphinx
-starlette==0.47.3         # via hypofuzz (pyproject.toml)
+starlette==0.48.0         # via hypofuzz (pyproject.toml)
 taskgroup==0.2.2          # via hypercorn
 tomli==2.2.1              # via black, hypercorn, pytest, sphinx
-trio==0.30.0              # via hypofuzz (pyproject.toml)
+trio==0.31.0              # via hypofuzz (pyproject.toml)
 typing-extensions==4.15.0  # via anyio, beautifulsoup4, black, exceptiongroup, hypercorn, libcst, starlette, taskgroup
 urllib3==2.5.0            # via requests
 watchdog==6.0.0           # via hypothesis

deps/test.txt

@@ -4,24 +4,24 @@
 #
 #    pip-compile --annotation-style=line --output-file=deps/test.txt deps/test.in pyproject.toml
 #
-anyio==4.10.0             # via starlette
+anyio==4.11.0             # via starlette
 attrs==25.3.0             # via hypothesis, outcome, trio
-black==25.1.0             # via hypofuzz (pyproject.toml), hypothesis
+black==25.9.0             # via hypofuzz (pyproject.toml), hypothesis
 certifi==2025.8.3         # via requests
 charset-normalizer==3.4.3  # via requests
 click==8.1.8              # via black, hypothesis
-coverage[toml]==7.10.6    # via hypofuzz (pyproject.toml), pytest-cov
+coverage[toml]==7.10.7    # via hypofuzz (pyproject.toml), pytest-cov
 exceptiongroup==1.3.0     # via anyio, hypercorn, hypothesis, pytest, taskgroup, trio
 execnet==2.1.1            # via pytest-xdist
 h11==0.16.0               # via hypercorn, wsproto
 h2==4.3.0                 # via hypercorn
 hpack==4.1.0              # via h2
 hypercorn==0.17.3         # via hypofuzz (pyproject.toml)
 hyperframe==6.1.0         # via h2
-hypothesis[cli,watchdog]==6.138.14  # via hypofuzz (pyproject.toml)
+hypothesis[cli,watchdog]==6.140.2  # via hypofuzz (pyproject.toml)
 idna==3.10                # via anyio, requests, trio
 iniconfig==2.1.0          # via pytest
-libcst==1.8.2             # via hypofuzz (pyproject.toml)
+libcst==1.8.5             # via hypofuzz (pyproject.toml)
 markdown-it-py==3.0.0     # via rich
 mdurl==0.1.2              # via markdown-it-py
 mypy-extensions==1.1.0    # via black
@@ -31,20 +31,21 @@ pathspec==0.12.1          # via black
 platformdirs==4.4.0       # via black
 pluggy==1.6.0             # via pytest, pytest-cov
 priority==2.0.0           # via hypercorn
-psutil==7.0.0             # via hypofuzz (pyproject.toml)
+psutil==7.1.0             # via hypofuzz (pyproject.toml)
 pygments==2.19.2          # via pytest, rich
-pytest==8.4.1             # via -r deps/test.in, hypofuzz (pyproject.toml), pytest-cov, pytest-xdist
-pytest-cov==6.2.1         # via -r deps/test.in
+pytest==8.4.2             # via -r deps/test.in, hypofuzz (pyproject.toml), pytest-cov, pytest-xdist
+pytest-cov==7.0.0         # via -r deps/test.in
 pytest-xdist==3.8.0       # via -r deps/test.in
-pyyaml==6.0.2             # via libcst
+pytokens==0.1.10          # via black
+pyyaml==6.0.3             # via libcst
 requests==2.32.5          # via -r deps/test.in
 rich==14.1.0              # via hypothesis
 sniffio==1.3.1            # via anyio, trio
 sortedcontainers==2.4.0   # via hypothesis, trio
-starlette==0.47.3         # via hypofuzz (pyproject.toml)
+starlette==0.48.0         # via hypofuzz (pyproject.toml)
 taskgroup==0.2.2          # via hypercorn
 tomli==2.2.1              # via black, coverage, hypercorn, pytest
-trio==0.30.0              # via hypofuzz (pyproject.toml)
+trio==0.31.0              # via hypofuzz (pyproject.toml)
 typing-extensions==4.15.0  # via anyio, black, exceptiongroup, hypercorn, libcst, starlette, taskgroup
 urllib3==2.5.0            # via requests
 watchdog==6.0.0           # via hypothesis

pyproject.toml

@@ -27,7 +27,7 @@ keywords = ["python", "testing", "fuzzing", "property-based-testing"]
 dependencies = [
     "black>=23.3.0",
     "coverage>=5.2.1",
-    "hypothesis[cli,watchdog]>=6.138.14",
+    "hypothesis[cli,watchdog]>=6.140.2",
     "libcst>=1.0.0", # for hypothesis.extra._patching
     "psutil>=3.0.0",
     "pytest>=7.0.0",
@@ -127,7 +127,6 @@ ignore = [
     "E741",
     "FBT003",
     "PD011",
-    "PD901",
     "PIE790",  # See https://github.com/astral-sh/ruff/issues/10538
     "PT001",
     "PT003",

src/hypofuzz/__init__.py

@@ -2,5 +2,5 @@
 
 from hypofuzz.detection import in_hypofuzz_run
 
-__version__ = "25.09.01"
+__version__ = "25.09.02"
 __all__: list[str] = ["in_hypofuzz_run"]

src/hypofuzz/docs/changelog.md

@@ -2,6 +2,12 @@
 HypoFuzz uses [calendar-based versioning](https://calver.org/), with a
 `YY-MM-patch` format.
 
+(v25-09-02)=
+## 25.09.02
+
+* Fix error while running stateful tests
+* Support middle click to open links in new tab in more places
+
 (v25-09-01)=
 ## 25.09.01
 

src/hypofuzz/hypofuzz.py

@@ -174,7 +174,13 @@ def _new_state(
     ) -> HypofuzzStateForActualGivenExecution:
         arguments: list[Any] = []
 
-        if self.pytest_item is not None and isinstance(self.pytest_item.parent, Class):
+        if (
+            self.pytest_item is not None
+            and isinstance(self.pytest_item.parent, Class)
+            # don't get tricked by the .TestCase class in stateful tests;
+            # that's already a standard @given test
+            and not hasattr(self.pytest_item.obj, "_hypothesis_state_machine_class")
+        ):
             assert self._pytest_item_instance is not None
             # if we're a class-based test, we need to provide the `self` instance
             # as the first argument.

tests/common.py

@@ -1,3 +1,4 @@
+import dataclasses
 import inspect
 import os
 import queue
@@ -298,6 +299,7 @@ def write_test_code(path: Path, db_dir, code: str) -> None:
             import pytest
             from hypothesis import given, settings, strategies as st, HealthCheck, target
             from hypothesis.database import DirectoryBasedExampleDatabase
+            from hypothesis.stateful import RuleBasedStateMachine, rule
 
             from hypofuzz import in_hypofuzz_run
 
@@ -334,7 +336,7 @@ def interesting_origin(n: Optional[int] = None) -> InterestingOrigin:
         int("not an int")
     except Exception as e:
         origin = InterestingOrigin.from_exception(e)
-        return origin._replace(lineno=n if n is not None else origin.lineno)
+        return dataclasses.replace(origin, lineno=n if n is not None else origin.lineno)
 
 
 def collect(code: str) -> CollectionResult:

tests/conftest.py

@@ -0,0 +1,10 @@
+import os
+
+# If this envvar is set, Hypothesis loads the CI profile. We can't combine that
+# with hypofuzz, since the CI profile sets derandomize=True, which hypofuzz
+# skips during collection.
+#
+# This has to be changed at the os.environ level, instead of doing
+# settings.load_profile("default"), because pytest collection and subprocesses
+# inherit the current os.environ and would think themselves as in CI.
+os.environ.pop("__TOX_ENVIRONMENT_VARIABLE_ORIGINAL_CI", None)

tests/test_corpus.py

@@ -55,6 +55,7 @@ def observations(
             os_getpid=st.just(0),
             imported_at=st.just(0.0),
             data_status=statuses,
+            phase=st.just(""),
             interesting_origin=st.builds(interesting_origin, n=st.integers()),
             choice_nodes=st.lists(nodes()).map(tuple),
             choice_spans=st.just(None),

tests/test_fuzzing.py

@@ -24,6 +24,14 @@ class TestClassBased:
         def test_a(self, n):
             assert isinstance(self, TestClassBased)
             assert isinstance(n, int)
+    """,
+        """
+    class MyStateMachine(RuleBasedStateMachine):
+        @rule(n=st.integers())
+        def step(self, n):
+            assert isinstance(n, int)
+
+    TestMyStateMachine = MyStateMachine.TestCase
     """,
     ],
 )

tox.ini

@@ -48,10 +48,6 @@ xfail_strict = True
 addopts =
     -Werror
     --tb=short
-    # --cov=hypofuzz
-    # --cov-branch
-    # --cov-report=term-missing:skip-covered
-    # --cov-fail-under=100
 
 [coverage:report]
 exclude_lines =

visual_tests/test_stateful.py

@@ -0,0 +1,11 @@
+from hypothesis import strategies as st
+from hypothesis.stateful import RuleBasedStateMachine, rule
+
+
+class SimpleStateMachine(RuleBasedStateMachine):
+    @rule(n=st.integers())
+    def step(self, n):
+        assert isinstance(n, int)
+
+
+TestStatefulSimple = SimpleStateMachine.TestCase