Add flatbuffers enum domain

.github/workflows/cmake_test.yml

@@ -77,6 +77,7 @@ jobs:
             -D CMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -D CMAKE_BUILD_TYPE=RelWithDebug \
             -D FUZZTEST_BUILD_TESTING=on \
+            -D FUZZTEST_BUILD_FLATBUFFERS=on \
           && cmake --build build -j $(nproc) \
           && ctest --test-dir build -j $(nproc) --output-on-failure
       - name: Run all tests in default mode with gcc
@@ -90,6 +91,7 @@ jobs:
             -D CMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -D CMAKE_BUILD_TYPE=RelWithDebug \
             -D FUZZTEST_BUILD_TESTING=on \
+            -D FUZZTEST_BUILD_FLATBUFFERS=on \
           && cmake --build build_gcc -j $(nproc) \
           && ctest --test-dir build_gcc -j $(nproc) --output-on-failure
       - name: Run end-to-end tests in fuzzing mode
@@ -104,6 +106,7 @@ jobs:
             -D CMAKE_BUILD_TYPE=RelWithDebug \
             -D FUZZTEST_FUZZING_MODE=on \
             -D FUZZTEST_BUILD_TESTING=on \
+            -D FUZZTEST_BUILD_FLATBUFFERS=on \
           && cmake --build build -j $(nproc) \
           && ctest --test-dir build -j $(nproc) --output-on-failure -R "functional_test"
       - name: Save new cache based on main

CMakeLists.txt

@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.19)
 project(fuzztest)
 
 option(FUZZTEST_BUILD_TESTING "Building the tests." OFF)
+option(FUZZTEST_BUILD_FLATBUFFERS "Building the flatbuffers support." OFF)
 option(FUZZTEST_FUZZING_MODE "Building the fuzztest in fuzzing mode." OFF)
 set(FUZZTEST_COMPATIBILITY_MODE "" CACHE STRING "Compatibility mode. Available options: <empty>, libfuzzer")
 set(CMAKE_CXX_STANDARD 17)

MODULE.bazel

@@ -42,6 +42,10 @@ bazel_dep(
     name = "platforms",
     version = "0.0.10",
 )
+bazel_dep(
+    name = "flatbuffers",
+    version = "25.2.10"
+)
 # GoogleTest is not a dev dependency, because it's needed when FuzzTest is used
 # with GoogleTest integration (e.g., googletest_adaptor). Note that the FuzzTest
 # framework can be used without GoogleTest integration as well.
@@ -55,8 +59,6 @@ bazel_dep(
     name = "protobuf",
     version = "30.2",
 )
-# TODO(lszekeres): Make this a dev dependency, as the protobuf library is only
-# required for testing.
 bazel_dep(
     name = "rules_proto",
     version = "7.1.0",

cmake/BuildDependencies.cmake

@@ -21,6 +21,9 @@ set(proto_TAG v30.2)
 set(nlohmann_json_URL https://github.com/nlohmann/json.git)
 set(nlohmann_json_TAG v3.11.3)
 
+set(flatbuffers_URL https://github.com/google/flatbuffers.git)
+set(flatbuffers_TAG v25.2.10)
+
 if(POLICY CMP0135)
 	cmake_policy(SET CMP0135 NEW)
 	set(CMAKE_POLICY_DEFAULT_CMP0135 NEW)
@@ -50,6 +53,14 @@ FetchContent_Declare(
   URL_HASH MD5=${antlr_cpp_MD5}
 )
 
+if (FUZZTEST_BUILD_FLATBUFFERS)
+  FetchContent_Declare(
+    flatbuffers
+    GIT_REPOSITORY ${flatbuffers_URL}
+    GIT_TAG        ${flatbuffers_TAG}
+  )
+endif()
+
 if (FUZZTEST_BUILD_TESTING)
 
   FetchContent_Declare(
@@ -87,3 +98,9 @@ if (FUZZTEST_BUILD_TESTING)
   FetchContent_MakeAvailable(nlohmann_json)
 
 endif ()
+
+if (FUZZTEST_BUILD_FLATBUFFERS)
+  set(FLATBUFFERS_BUILD_TESTS OFF)
+  set(FLATBUFFERS_BUILD_INSTALL OFF)
+  FetchContent_MakeAvailable(flatbuffers)
+endif()

cmake/generate_cmake_from_bazel.py

@@ -52,6 +52,7 @@
     "@abseil-cpp//absl/types:optional": "absl::optional",
     "@abseil-cpp//absl/types:span": "absl::span",
     "@abseil-cpp//absl/types:variant": "absl::variant",
+    "@flatbuffers//:runtime_cc": "flatbuffers",
     "@googletest//:gtest": "GTest::gtest",
     "@googletest//:gtest_main": "GTest::gmock_main",
     "@protobuf//:protobuf": "protobuf::libprotobuf",

domain_tests/BUILD

@@ -37,6 +37,22 @@ cc_test(
     ],
 )
 
+cc_test(
+    name = "arbitrary_domains_flatbuffers_test",
+    srcs = ["arbitrary_domains_flatbuffers_test.cc"],
+    deps = [
+        ":domain_testing",
+        "@abseil-cpp//absl/container:flat_hash_map",
+        "@abseil-cpp//absl/random",
+        "@com_google_fuzztest//fuzztest:domain",
+        "@com_google_fuzztest//fuzztest:flatbuffers",
+        "@com_google_fuzztest//fuzztest:meta",
+        "@com_google_fuzztest//fuzztest:test_flatbuffers_cc_fbs",
+        "@flatbuffers//:runtime_cc",
+        "@googletest//:gtest_main",
+    ],
+)
+
 cc_test(
     name = "arbitrary_domains_protobuf_test",
     srcs = ["arbitrary_domains_protobuf_test.cc"],

domain_tests/CMakeLists.txt

@@ -23,6 +23,29 @@ fuzztest_cc_test(
     GTest::gmock_main
 )
 
+if (FUZZTEST_BUILD_FLATBUFFERS)
+  fuzztest_cc_test(
+    NAME
+      arbitrary_domains_flatbuffers_test
+    SRCS
+      "arbitrary_domains_flatbuffers_test.cc"
+    DEPS
+      absl::flat_hash_set
+      absl::random_bit_gen_ref
+      absl::random_random
+      absl::strings
+      flatbuffers
+      fuzztest::domain
+      fuzztest::domain_testing
+      fuzztest::flatbuffers
+      GTest::gmock_main
+      test_flatbuffers
+  )
+  add_dependencies(fuzztest_arbitrary_domains_flatbuffers_test
+    GENERATE_test_flatbuffers
+  )
+endif()
+
 fuzztest_cc_test(
   NAME
     arbitrary_domains_protobuf_test