[ObjC] run cf event engine test suit on ios (#33534)

Run cf event engine test suit on ios

CC: @sampajano  @mikefan1991

src/objective-c/tests/BUILD

@@ -333,6 +333,23 @@ grpc_objc_ios_unit_test(
     deps = [":CFStreamTests-lib"],
 )
 
+grpc_objc_testing_library(
+    name = "EventEngineTests-lib",
+    srcs = glob(["EventEngineTests/*.mm"]),
+    # defines = ["GRPC_IOS_EVENT_ENGINE_CLIENT=1"],
+    deps = [
+        "//src/core:cf_event_engine",
+        "//test/core/event_engine/test_suite/posix:oracle_event_engine_posix",
+        "//test/core/event_engine/test_suite/tests:client",
+        "//test/core/event_engine/test_suite/tests:timer",
+    ],
+)
+
+grpc_objc_ios_unit_test(
+    name = "EventEngineTests",
+    deps = [":EventEngineTests-lib"],
+)
+
 # Note that bazel currently doesn't support running tvos_unit_test
 # See https://github.com/bazelbuild/rules_apple/blob/8d841342c238457896cd7596cc29b2d06c9a75f0/apple/testing/default_runner/tvos_test_runner.template.sh
 tvos_unit_test(
@@ -367,8 +384,8 @@ grpc_sh_test(
     name = "objc_codegen_plugin_test",
     srcs = ["PluginTest/plugin_test.sh"],
     data = [
-        "@com_google_protobuf//:protoc",
         "//src/compiler:grpc_objective_c_plugin",
+        "@com_google_protobuf//:protoc",
     ] + glob(["PluginTest/*.proto"]),
     uses_polling = False,
 )
@@ -377,8 +394,8 @@ grpc_sh_test(
     name = "objc_codegen_plugin_option_test",
     srcs = ["PluginTest/plugin_option_test.sh"],
     data = [
-        "@com_google_protobuf//:protoc",
         "//src/compiler:grpc_objective_c_plugin",
+        "@com_google_protobuf//:protoc",
         "@com_google_protobuf//:well_known_type_protos",
     ] + glob(["RemoteTestClient/*.proto"]),
     uses_polling = False,

src/objective-c/tests/EventEngineTests/CFEventEngineTests.mm

@@ -0,0 +1,65 @@
+/*
+ *
+ * Copyright 2023 gRPC authors.
+ *
+ * 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 <XCTest/XCTest.h>
+
+#include <grpc/grpc.h>
+
+#include "src/core/lib/event_engine/cf_engine/cf_engine.h"
+#include "test/core/event_engine/test_suite/event_engine_test_framework.h"
+#include "test/core/event_engine/test_suite/posix/oracle_event_engine_posix.h"
+#include "test/core/event_engine/test_suite/tests/client_test.h"
+#include "test/core/event_engine/test_suite/tests/timer_test.h"
+#include "test/core/util/test_config.h"
+
+@interface EventEngineTimerTests : XCTestCase
+@end
+
+@implementation EventEngineTimerTests
+
+- (void)testAll {
+  NSArray *arguments = [NSProcessInfo processInfo].arguments;
+  int argc = (int)arguments.count;
+  char **argv = static_cast<char **>(alloca((sizeof(char *) * (argc + 1))));
+  for (int index = 0; index < argc; index++) {
+    argv[index] = const_cast<char *>([arguments[index] UTF8String]);
+  }
+  argv[argc] = NULL;
+
+  testing::InitGoogleTest(&argc, (char **)argv);
+  grpc::testing::TestEnvironment env(&argc, (char **)argv);
+
+  auto factory = []() {
+    return std::make_unique<grpc_event_engine::experimental::CFEventEngine>();
+  };
+  auto oracle_factory = []() {
+    return std::make_unique<grpc_event_engine::experimental::PosixOracleEventEngine>();
+  };
+  SetEventEngineFactories(factory, oracle_factory);
+  grpc_event_engine::experimental::InitTimerTests();
+  grpc_event_engine::experimental::InitClientTests();
+  // TODO(ctiller): EventEngine temporarily needs grpc to be initialized first
+  // until we clear out the iomgr shutdown code.
+  grpc_init();
+  int r = RUN_ALL_TESTS();
+  grpc_shutdown();
+
+  XCTAssertEqual(r, 0);
+}
+
+@end

test/core/event_engine/test_suite/posix/BUILD

@@ -27,7 +27,10 @@ grpc_cc_library(
         "cpu:10",
         "no_windows",
     ],
-    visibility = ["//test:__subpackages__"],
+    visibility = [
+        "//src/objective-c/tests:__subpackages__",
+        "//test:__subpackages__",
+    ],
     deps = [
         "//:grpc",
         "//test/core/event_engine:event_engine_test_utils",

tools/internal_ci/macos/grpc_objc_bazel_test.sh

@@ -61,6 +61,7 @@ TEST_TARGETS=(
   #//src/objective-c/tests:CronetTests
   #//src/objective-c/tests:PerfTests
   //src/objective-c/tests:CFStreamTests
+  //src/objective-c/tests:EventEngineTests
   //src/objective-c/tests:tvtests_build_test
   # codegen plugin tests
   //src/objective-c/tests:objc_codegen_plugin_test