src/test/py/bazel/bazel_tools_proto_test.py

# pylint: disable=g-bad-file-header
# Copyright 2026 The Bazel Authors. All rights reserved.
#
# 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.

from src.test.py.bazel import test_base


class BazelToolsProtoTest(test_base.TestBase):

  def testProtoLibraryInBazelTools(self):
    self.AddBazelDep('protobuf')
    self.ScratchFile(
        'BUILD',
        [
            'load("@protobuf//bazel:proto_library.bzl", "proto_library")',
            'proto_library(',
            '    name = "my_proto",',
            '    srcs = ["my.proto"],',
            (
                '    deps ='
                ' ["@bazel_tools//src/main/protobuf:action_cache_proto"],'
            ),
            ')',
        ],
    )
    self.ScratchFile(
        'my.proto',
        [
            'syntax = "proto3";',
            'import "src/main/protobuf/action_cache.proto";',
            'package my;',
            'message MyMessage {',
            '  blaze.ActionCacheStatistics stats = 1;',
            '}',
        ],
    )

    # This should succeed because we fixed the visibility/load issues in
    # @bazel_tools//src/main/protobuf:BUILD
    self.RunBazel(['build', '//:my_proto'])

  def testUnsupportedLanguageSpecificProtoTargets(self):
    self.AddBazelDep('protobuf')
    self.ScratchFile(
        'BUILD',
        [
            'alias(',
            '    name = "bad_alias",',
            (
                '    actual ='
                ' "@bazel_tools//src/main/protobuf:action_cache_java_proto",'
            ),
            ')',
        ],
    )

    exit_code, _, stderr = self.RunBazel(
        ['build', '//:bad_alias'], allow_failure=True
    )
    self.AssertExitCode(exit_code, 1, stderr)
    self.assertIn(
        'Language specific proto targets are not available in @bazel_tools',
        ''.join(stderr),
    )
    self.assertIn(
        'Please use the proto_library and generate your own code',
        ''.join(stderr),
    )


if __name__ == '__main__':
  test_base.absltest.main()