tests(fuzz): switch to Pytest for running multiple fuzz tests in a test suite

Author: stanislaw

.github/workflows/ci_fuzz_linux.yml

@@ -55,7 +55,7 @@ jobs:
       run: |
         if [ "${{ github.event_name }}" = "schedule" ]; then
           echo "🕒 Running long fuzzing..."
-          invoke test-fuzz --long
+          invoke test-fuzz --total-mutations 25
         else
           echo "🚀 Running short fuzzing..."
           invoke test-fuzz
@@ -66,6 +66,6 @@ jobs:
       if: failure() || always()
       uses: actions/upload-artifact@v4
       with:
-        name: broken-pdfs
-        path: output/
+        name: tests_fuzz_broken_pdfs
+        path: build/tests_fuzz
         retention-days: 30

html2pdf4doc/__init__.py

@@ -0,0 +1,18 @@
+import os
+from pathlib import Path
+
+__version__ = "0.0.22"
+
+PATH_TO_HTML2PDF4DOC_PY = os.path.join(
+    os.path.dirname(os.path.join(__file__)),
+    "main.py",
+)
+PATH_TO_HTML2PDF4DOC_JS = os.path.join(
+    os.path.dirname(os.path.join(__file__)),
+    "html2pdf4doc_js",
+    "html2pdf4doc.min.js",
+)
+
+DEFAULT_CACHE_DIR = os.path.join(Path.home(), ".html2pdf4doc", "chromedriver")
+
+PATH_TO_CHROME_DRIVER_DEBUG_LOG = "/tmp/chromedriver.log"

html2pdf4doc/html2pdf4doc.py html2pdf4doc/main.pyhtml2pdf4doc/html2pdf4doc.py renamed to html2pdf4doc/main.py

@@ -21,19 +21,13 @@
 from selenium.webdriver.chrome.service import Service
 from webdriver_manager.core.os_manager import ChromeType, OperationSystemManager
 
-__version__ = "0.0.22"
-
-PATH_TO_HTML2PDF4DOC_PY = __file__
-PATH_TO_HTML2PDF4DOC_JS = os.path.join(
-    os.path.dirname(os.path.join(__file__)),
-    "html2pdf4doc_js",
-    "html2pdf4doc.min.js",
+from html2pdf4doc import (
+    DEFAULT_CACHE_DIR,
+    PATH_TO_CHROME_DRIVER_DEBUG_LOG,
+    PATH_TO_HTML2PDF4DOC_JS,
+    __version__,
 )
 
-DEFAULT_CACHE_DIR = os.path.join(Path.home(), ".html2pdf4doc", "chromedriver")
-
-PATH_TO_CHROME_DRIVER_DEBUG_LOG = "/tmp/chromedriver.log"
-
 # HTML2PDF4Doc.js prints unicode symbols to console. The following makes it work on
 # Windows which otherwise complains:
 # UnicodeEncodeError: 'charmap' codec can't encode characters in position 129-130: character maps to <undefined>

html2pdf4doc/html2pdf4doc_fuzzer.py html2pdf4doc/main_fuzzer.pyhtml2pdf4doc/html2pdf4doc_fuzzer.py renamed to html2pdf4doc/main_fuzzer.py

@@ -80,7 +80,7 @@ def mutate_and_print(path_to_input_file: str, path_to_root: str) -> bool:
         cmd.append(path_to_print_[0])
         cmd.append(path_to_print_[1])
 
-    relative_path_to_mut_html = Path(path_to_root).relative_to(".")
+    relative_path_to_mut_html = Path(path_to_mut_html).relative_to(path_to_root)
     path_to_mut_output = f"output/{relative_path_to_mut_html}"
 
     def copy_files_if_needed() -> None:
@@ -143,30 +143,16 @@ def copy_mutated_file() -> None:
     return True
 
 
-def main() -> None:
-    parser = argparse.ArgumentParser()
-
-    parser.add_argument("input_file", type=str, help="TODO")
-    parser.add_argument("root_path", type=str, help="TODO")
-    parser.add_argument(
-        "--long",
-        action="store_true",
-        help="Run the fuzzer in long mode (more iterations).",
-    )
-
-    args = parser.parse_args()
-
-    path_to_input_file = args.input_file
-    path_to_root = args.root_path
-
+def fuzz_test(
+    *, path_to_input_file: str, path_to_root: str, total_mutations: int = 20
+) -> None:
     shutil.rmtree("output", ignore_errors=True)
     Path("output").mkdir(parents=True, exist_ok=True)
 
-    total_runs = 200 if args.long else 20
     success_count, failure_count = 0, 0
-    for i in range(1, total_runs + 1):
+    for i in range(1, total_mutations + 1):
         print(  # noqa: T201
-            f"html2pdf4doc_fuzzer print cycle #{i}/{total_runs} — "
+            f"html2pdf4doc_fuzzer print cycle #{i}/{total_mutations} — "
             f"So far: 🟢{success_count} / 🔴{failure_count}",
             flush=True,
         )
@@ -176,18 +162,44 @@ def main() -> None:
         else:
             failure_count += 1
 
-    assert total_runs > 0
-    success_rate_percent = (success_count / total_runs) * 100
+    assert total_mutations > 0
+    success_rate_percent = (success_count / total_mutations) * 100
 
     print(  # noqa: T201
         f"html2pdf4doc_fuzzer: finished {'✅' if failure_count == 0 else '❌'} — "
-        f"Success rate: {success_count}/{total_runs} ({success_rate_percent}%)",
+        f"Success rate: {success_count}/{total_mutations} ({success_rate_percent}%)",
         flush=True,
     )
 
     if failure_count > 0:
         sys.exit(1)
 
 
+def main() -> None:
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument("input_file", type=str, help="TODO")
+    parser.add_argument("root_path", type=str, help="TODO")
+    parser.add_argument(
+        "--total-mutations",
+        type=int,
+        choices=range(1, 1001),
+        required=True,
+        help="An integer between 1 and 1000",
+    )
+
+    args = parser.parse_args()
+
+    path_to_input_file = args.input_file
+    path_to_root = args.root_path
+    total_mutations = args.total_mutations
+
+    fuzz_test(
+        path_to_input_file=path_to_input_file,
+        path_to_root=path_to_root,
+        total_mutations=total_mutations,
+    )
+
+
 if __name__ == "__main__":
     main()

pyproject.toml

@@ -69,8 +69,8 @@ development = [
 ]
 
 [project.scripts]
-html2pdf4doc = "html2pdf4doc.html2pdf4doc:main"
-html2pdf4doc_fuzzer = "html2pdf4doc.html2pdf4doc_fuzzer:main"
+html2pdf4doc = "html2pdf4doc.main:main"
+html2pdf4doc_fuzzer = "html2pdf4doc.main_fuzzer:main"
 
 [project.urls]
 Changelog = "https://github.com/mettta/html2pdf_python/releases/"

tasks.py

@@ -102,7 +102,7 @@ def get_chrome_driver(
     run_invoke(
         context,
         """
-        python html2pdf4doc/html2pdf4doc.py get_driver
+        python html2pdf4doc/main.py get_driver
     """,
     )
 
@@ -175,7 +175,7 @@ def test_integration(
 
     cwd = os.getcwd()
 
-    html2pdf_exec = f'python3 \\"{cwd}/html2pdf4doc/html2pdf4doc.py\\"'
+    html2pdf_exec = f'python3 \\"{cwd}/html2pdf4doc/main.py\\"'
 
     focus_or_none = f"--filter {focus}" if focus else ""
     debug_opts = "-vv --show-all" if debug else ""
@@ -201,16 +201,37 @@ def test_integration(
 
 
 @task(aliases=["tf"])
-def test_fuzz(context, long: bool = False):
-    arg_long = "--long" if long else ""
+def test_fuzz(context, focus=None, total_mutations: int = 10, output=False):
+    """
+    @relation(SDOC-SRS-44, scope=function)
+    """
+
+    test_reports_dir = "build/test_reports"
+
+    Path(test_reports_dir).mkdir(parents=True, exist_ok=True)
+
+    focus_argument = f"-k {focus}" if focus is not None else ""
+    long_argument = (
+        f"--fuzz-total-mutations {total_mutations}" if total_mutations else ""
+    )
+    output_argument = "--capture=no" if output else ""
+
+    run_invoke(
+        context,
+        """
+            rm -rf build/tests_fuzz
+        """,
+    )
 
     run_invoke(
         context,
         f"""
-            python html2pdf4doc/html2pdf4doc_fuzzer.py
-                tests/fuzz/01_strictdoc_guide_202510/strictdoc/docs/strictdoc_01_user_guide-PDF.html
-                tests/fuzz/01_strictdoc_guide_202510/
-                {arg_long}
+            pytest
+            {focus_argument}
+            {long_argument}
+            {output_argument}
+            -o cache_dir=build/tests_fuzz_cache
+            tests/fuzz/
         """,
     )
 

tests/fuzz/01_strictdoc_guide_202510/test_case.py

@@ -0,0 +1,18 @@
+import os
+
+from html2pdf4doc.main_fuzzer import fuzz_test
+from tests.fuzz.conftest import create_build_folder, FuzzConfig
+
+PATH_TO_THIS_FOLDER = os.path.dirname(__file__)
+
+def test(fuzz_config: FuzzConfig):
+    build_folder = create_build_folder(PATH_TO_THIS_FOLDER)
+
+    fuzz_test(
+        path_to_input_file=os.path.join(
+            build_folder,
+            "strictdoc/docs/strictdoc_01_user_guide-PDF.html"
+        ),
+        path_to_root=build_folder,
+        total_mutations=fuzz_config.total_mutations
+    )

tests/fuzz/conftest.py

@@ -0,0 +1,48 @@
+import os
+import shutil
+from dataclasses import dataclass
+from pathlib import Path
+
+import pytest
+
+PATH_TO_TESTS_FUZZ_FOLDER = os.path.dirname(__file__)
+
+
+@dataclass
+class FuzzConfig:
+    total_mutations: bool
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--fuzz-total-mutations",
+        action="store",
+        type=int,
+        choices=range(1, 1001),
+        default=10,
+        help="Total number of mutations to perform (1-1000)"
+    )
+
+@pytest.fixture
+def fuzz_config(request):
+    return FuzzConfig(total_mutations=request.config.getoption("--fuzz-total-mutations"))
+
+
+def create_build_folder(test_folder: str) -> str:
+    assert os.path.isdir(test_folder), test_folder
+    assert os.path.isabs(test_folder), test_folder
+
+    relative_path_to_test_folder = Path(test_folder).relative_to(PATH_TO_TESTS_FUZZ_FOLDER)
+
+    # IMPORTANT: The number of nested folders matches the number of nesting
+    #            in the tests/fuzz/* test folders. Otherwise, the html2pdf4doc.js
+    #            will not be found in either of tests/fuzz/* or build/tests_fuzz/*.
+    build_folder = os.path.join(
+        "build",
+        "tests_fuzz",
+        relative_path_to_test_folder
+    )
+
+    shutil.copytree(test_folder, build_folder)
+
+    return build_folder

tests/integration/20_fuzz_integration/test.itest

@@ -0,0 +1,8 @@
+# This test verifies that the main_fuzzer.py script works as a standalone
+# command-line program.
+
+RUN: mkdir -p %project_root/build/tests_integration_fuzz/
+RUN: cp -rv %project_root/tests/fuzz/01_strictdoc_guide_202510 %project_root/build/tests_integration_fuzz/
+
+RUN: PYTHONPATH=%project_root python %project_root/html2pdf4doc/main_fuzzer.py %project_root/build/tests_integration_fuzz/01_strictdoc_guide_202510/strictdoc/docs/strictdoc_01_user_guide-PDF.html %project_root/build/tests_integration_fuzz/01_strictdoc_guide_202510 --total-mutations 1 | filecheck %s --dump-input=fail
+CHECK: html2pdf4doc_fuzzer: finished ✅ — Success rate: 1/1 (100.0%)