1 files changed, 61 insertions, 0 deletions
diff --git a/projects/g-apis-py-api-core/fuzz_path_template.py b/projects/g-apis-py-api-core/fuzz_path_template.py
new file mode 100644
index 00000000..4438d0ad
--- /dev/null
+++ b/projects/g-apis-py-api-core/fuzz_path_template.py
@@ -0,0 +1,61 @@
+#!/usr/bin/python3
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import atheris
+import sys
+
+with atheris.instrument_imports():
+  from google.api_core import path_template
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  targets = [
+    "expand",
+    "transcode",
+    "validate"
+  ]
+  target = targets[fdp.ConsumeIntInRange(0, len(targets)-1)]
+  if target == "expand":
+    s1 = fdp.ConsumeString(200)
+    s2 = fdp.ConsumeString(200)
+    try:
+      path_template.expand(s1, s2)
+    except ValueError:
+      # ValueError is raised
+      # https://github.com/googleapis/python-api-core/blob/5b5e77563229687c901d77b5fdecc18168b535e6/google/api_core/path_template.py#L123
+      pass
+  elif target == "transcode":
+    s1 = fdp.ConsumeString(200)
+    s2 = fdp.ConsumeString(200)
+    s3 = fdp.ConsumeString(200)
+    try:
+        path_template.transcode([{'uri' : s1, 'body' : s2,'method' : s3}])
+    except ValueError:
+        # ValueError is raised:
+        # https://github.com/googleapis/python-api-core/blob/main/google/api_core/path_template.py#L260
+        pass
+  elif target == "validate":
+    s1 = fdp.ConsumeString(200)
+    s2 = fdp.ConsumeString(200)
+    path_template.validate(s1, s2)
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+if __name__ == "__main__":
+  main()