Add test for typed option to validate std::any_cast cross DSO

Author: raulcd

cpp/src/arrow/filesystem/localfs_test.cc

@@ -30,6 +30,7 @@
 #include "arrow/filesystem/path_util.h"
 #include "arrow/filesystem/test_util.h"
 #include "arrow/filesystem/util_internal.h"
+#include "arrow/testing/examplefs.h"
 #include "arrow/testing/gtest_util.h"
 #include "arrow/testing/matchers.h"
 #include "arrow/util/io_util.h"
@@ -84,6 +85,12 @@ Result<std::shared_ptr<FileSystem>> FSFromUriOrPath(const std::string& uri,
 ////////////////////////////////////////////////////////////////////////////
 // Registered FileSystemFactory tests
 
+struct ConcreteTypedOption : ExampleTypedOption {
+  explicit ConcreteTypedOption(int value) : value_(value) {}
+  int value() const override { return value_; }
+  int value_;
+};
+
 class SlowFileSystemPublicProps : public SlowFileSystem {
  public:
   SlowFileSystemPublicProps(std::shared_ptr<FileSystem> base_fs, double average_latency,
@@ -153,9 +160,11 @@ TEST(FileSystemFromUri, LoadedRegisteredFactory) {
   std::vector<std::pair<std::string, std::any>> options{
       {"example_option_string", std::string("example_value")},
       {"example_option_int", 42},
+      {"example_typed_option",
+       std::shared_ptr<ExampleTypedOption>(std::make_shared<ConcreteTypedOption>(12345))},
   };
   ASSERT_OK_AND_ASSIGN(fs, FileSystemFromUri("example:///hey/yo", options, &path));
-  EXPECT_EQ(path, "/hey/yo/example_value/42");
+  EXPECT_EQ(path, "/hey/yo/example_value/42/12345");
   EXPECT_EQ(fs->type_name(), "local");
 }
 

cpp/src/arrow/testing/examplefs.cc

@@ -21,6 +21,7 @@
 #include "arrow/filesystem/filesystem.h"
 #include "arrow/filesystem/filesystem_library.h"
 #include "arrow/result.h"
+#include "arrow/testing/examplefs.h"
 #include "arrow/util/uri.h"
 
 #include <gtest/gtest.h>
@@ -49,6 +50,15 @@ auto kExampleFileSystemModule = ARROW_REGISTER_FILESYSTEM(
           if (out_path != nullptr) {
             *out_path += "/" + std::to_string(std::any_cast<int>(value));
           }
+        } else if (key == "example_typed_option") {
+          if (const auto* opt =
+                  std::any_cast<std::shared_ptr<ExampleTypedOption>>(&value)) {
+            if (out_path != nullptr) {
+              *out_path += "/" + std::to_string((*opt)->value());
+            }
+          } else if (out_path != nullptr) {
+            *out_path += "/typed_cast_failed";
+          }
         } else {
           ADD_FAILURE() << "Unexpected option: " << key;
         }