!218 【内核子系统集成测试】恢复不稳定的用例：fs_posix模块FsStdlibTest.cpp#testRealpath

Merge pull request !218 from 是蕊蕊呀/kernel_lite_20210518_3

kernel_lite/fs_posix/src/FsStdlibTest.cpp

@@ -120,8 +120,16 @@ HWTEST_F(FileSystemTest, testRealpath, Function | MediumTest | Level3)
     // get Absolute Path
     const char *realPathStandard = TOP_DIR "/" FILE0;
     char *realPath = (char*)malloc(256);
-    ASSERT_NE(realpath(FILE0, realPath), nullptr) << "> realpath errno = " << errno;
-    EXPECT_STREQ(realPath, realPathStandard);
-    LOG("> realPath = %s", realPath);
-    free(realPath);
+    if (realpath(FILE0, realPath) == nullptr)
+    {
+        LOG("> realpath errno == %d", errno);
+        free(realPath);
+        ASSERT_TRUE(false);
+    }
+    else
+    {
+        EXPECT_STREQ(realPath, realPathStandard);
+        LOG("> realPath = %s", realPath);
+        free(realPath);
+    }
 }