Run grpc_tools tests under Bazel

src/python/grpcio_tests/tests/unit/BUILD.bazel

@@ -89,8 +89,6 @@ py_library(
         srcs = [test_file_name],
         data = [
             "//src/python/grpcio_tests/tests/unit/credentials",
-            # TODO: Filegroup?
-            "//src/python/grpcio_tests/unit:data/foo/bar.proto",
         ],
         imports = ["../../"],
         main = test_file_name,
@@ -112,6 +110,7 @@ py_library(
     for test_file_name in GRPCIO_TESTS_UNIT
 ]
 
+# TODO: Somehow incorporate into setup.py workflow.
 py2and3_test(
     name = "_dynamic_stubs_test",
     size = "small",

tools/distrib/python/grpcio_tools/grpc_tools/BUILD

@@ -3,13 +3,11 @@ package(default_visibility = ["//visibility:public"])
 
 load("//bazel:cython_library.bzl", "pyx_library")
 
-load("//bazel:python_rules.bzl", "py_grpc_library", "py_proto_library")
-
-
 # TODO: Move this build file up a directory to ensure that this
 # points to '.', not a directory above the package root.
 NON_BAZEL_ROOT = "../"
 
+# TODO: Move BUILD file up a directory
 cc_library(
     # TODO: Better name?
     name = "protoc_lib",

tools/internal_ci/linux/grpc_python_bazel_test_in_docker.sh

@@ -24,7 +24,7 @@ git clone /var/local/jenkins/grpc /var/local/git/grpc
 && git submodule update --init --reference /var/local/jenkins/grpc/${name} \
 ${name}')
 cd /var/local/git/grpc/test
-TEST_TARGETS="//src/python/... //examples/python/..."
+TEST_TARGETS="//src/python/... //tools/distrib/python/grpcio_tools/... //examples/python/..."
 BAZEL_FLAGS="--spawn_strategy=standalone --genrule_strategy=standalone --test_output=errors"
 bazel test ${BAZEL_FLAGS} ${TEST_TARGETS}
 bazel test --config=python_single_threaded_unary_stream ${BAZEL_FLAGS} ${TEST_TARGETS}