无法通过Bazel的ios_unit_test规则运行C++测试的问题求助

尝试通过Google Test库添加C测试，并通过ios_unit_test目标运行，但测试完全未执行。试过直接集成C测试库，或通过objc_library集成，两种方式都无效。相关配置如下：

Module.bzl #

module(
    name = "bazelsample",
    version = "0.0.1",
    repo_name = "bazel_sample"
)

bazel_dep(name = "apple_support", version = "1.15.1")
bazel_dep(name = "rules_apple", version = "3.5.1", repo_name="build_bazel_rules_apple")
bazel_dep(name = "rules_ios", version = "4.4.0", repo_name="build_bazel_rules_ios")
bazel_dep(name = "googletest", version = "1.14.0")

BUILD #

load("@build_bazel_rules_apple//apple:ios.bzl", "ios_unit_test")
load("@rules_cc//cc:defs.bzl", "cc_library")

cc_library(
    name = "cpp_tests_lib",
    srcs = [
        "cpp_tests_lib/cpp_test.cpp",
    ],
    deps = [
        "@googletest//:gtest",
        "@googletest//:gtest_main",
    ],
    visibility = ["//visibility:public"],
)

objc_library(
    name = "objc_tests_lib",
    srcs = [
        "objc_tests_lib/GoogleTests.mm",
    ],
    deps = [
        ":cpp_tests_lib",
        "@googletest//:gtest",
        "@googletest//:gtest_main",
    ],
    visibility = ["//visibility:public"],
    sdk_frameworks = ["XCTest"],
)

objc_library(
    name = "objc_cpp_tests_lib",
    srcs = [
        "cpp_tests_lib/cpp_test.cpp",
        "objc_tests_lib/GoogleTests.mm",
    ],
    deps = [
        "@googletest//:gtest",
        "@googletest//:gtest_main",
    ],
    visibility = ["//visibility:public"],
    sdk_frameworks = ["XCTest"],
)

ios_unit_test(
    name = "ios_cpp_tests_lib",
    minimum_os_version = "17.0",
    deps = [":cpp_tests_lib"],
    visibility = ["//visibility:public"],
)

ios_unit_test(
    name = "ios_objc_tests_lib",
    minimum_os_version = "17.0",
    deps = [":objc_tests_lib"],
    visibility = ["//visibility:public"],
)

ios_unit_test(
    name = "ios_objc_cpp_tests_lib",
    minimum_os_version = "17.0",
    deps = [":objc_cpp_tests_lib"],
    visibility = ["//visibility:public"],
)

C++测试代码（cpp_test.cpp） #

#include <gtest/gtest.h>

TEST(YourTestSuite, YourTestCase) {
    EXPECT_EQ(2 + 2, 4);
}

TEST(YourTestSuite, YourTestCaseTwo) {
    EXPECT_EQ(2 + 2, 4);
}

使用GoogleTests.mm文件在运行时连接C++ Google测试与XCTest，但运行时C测试未加载到Google Test库中，经确认：除非从ObjC测试类调用，否则C测试代码完全不会执行。

请问是否遗漏了某些步骤，或者是否无法通过ios_unit_test规则集成并运行C++测试？

以下是修复C++测试在ios_unit_test中不执行的关键步骤：

1. 移除gtest_main依赖
   gtest_main会提供独立的main函数，与iOS单元测试由XCTest框架管理入口的逻辑冲突。需删除所有@googletest//:gtest_main依赖，改用GoogleTests.mm中的逻辑触发GTest运行。

2. 确保C++测试代码被正确链接
   在objc_library中包含C测试源文件时，需添加C标准编译参数，确保Bazel正确处理C++代码。同时保证GoogleTests.mm中正确实现GTest的初始化与运行逻辑：

   #import <XCTest/XCTest.h>
   #include <gtest/gtest.h>
   
   @interface GoogleTests : XCTestCase
   @end
   
   @implementation GoogleTests
   
   - (void)testGoogleTests {
       testing::InitGoogleTest();
       int argc = 0;
       char** argv = nullptr;
       RUN_ALL_TESTS();
   }
   
   @end
   

3. 调整objc_library与ios_unit_test配置
   修改objc_library，直接包含C测试源文件，仅保留@googletest//:gtest依赖，并添加C编译选项。示例配置：

   objc_library(
       name = "objc_tests_lib",
       srcs = [
           "objc_tests_lib/GoogleTests.mm",
           "cpp_tests_lib/cpp_test.cpp",
       ],
       deps = [
           "@googletest//:gtest",
       ],
       visibility = ["//visibility:public"],
       sdk_frameworks = ["XCTest"],
       copts = ["-std=c++17"],
   )
   
   ios_unit_test(
       name = "ios_objc_tests_lib",
       minimum_os_version = "17.0",
       deps = [":objc_tests_lib"],
       visibility = ["//visibility:public"],
   )
   

4. 验证链接过程
   若测试仍未执行，可通过bazel build //:ios_objc_tests_lib --verbose_failures查看详细构建日志，确认cpp_test.cpp的目标文件是否被正确链接到测试包中。

内容的提问来源于stack exchange，提问作者Prasad