Fix duplicate entries in HEADER_SEARCH_PATHS when running react_native_post_install script

packages/react-native/scripts/cocoapods/__tests__/utils-test.rb

@@ -839,6 +839,74 @@ def test_updateSearchPaths_whenNotUseFrameworks_addsSearchPaths
         end
     end
 
+    # ====================================== #
+    # Test - Add Search Path If Not Included #
+    # ====================================== #
+    # Tests for string input
+    def test_add_search_path_if_not_included_adds_new_path_to_string
+        current_paths = "/path/to/headers /another/path"
+        new_path = "/new/path"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal("/path/to/headers /another/path /new/path", result)
+    end
+
+    def test_add_search_path_if_not_included_does_not_add_existing_path_to_string
+        current_paths = "/path/to/headers /another/path"
+        new_path = "/another/path"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal("/path/to/headers /another/path", result)
+    end
+
+    def test_add_search_path_if_not_included_does_not_add_existing_path_with_leading_space_to_string
+        current_paths = " /path/with/leading/space /another/path"
+        new_path = "/path/with/leading/space"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal("/path/with/leading/space /another/path", result)
+    end
+
+    def test_add_search_path_if_not_included_handles_path_with_spaces_in_string
+        current_paths = "/path/to/headers /another/path"
+        new_path = '"/path/with spaces/lib"'
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal('/path/to/headers /another/path "/path/with spaces/lib"', result)
+    end
+
+    # Tests for array input
+    def test_add_search_path_if_not_included_adds_new_path_to_array
+        current_paths = ["/path/to/headers", "/another/path"]
+        new_path = "/new/path"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal(["/path/to/headers", "/another/path", "/new/path"], result)
+    end
+
+    def test_add_search_path_if_not_included_does_not_add_existing_path_to_array
+        current_paths = ["/path/to/headers", "/another/path"]
+        new_path = "/another/path"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal(["/path/to/headers", "/another/path"], result)
+    end
+
+    def test_add_search_path_if_not_included_strips_leading_and_trailing_spaces_in_array
+        current_paths = ["/path/to/headers", " /another/path"]
+        new_path = "/another/path"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal(["/path/to/headers", "/another/path"], result)
+    end
+
+    def test_add_search_path_if_not_included_handles_path_with_spaces_in_array
+        current_paths = [" /path/to/headers  ", "/another/path"]
+        new_path = '"/path/with spaces/lib"'
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal(["/path/to/headers", "/another/path", '"/path/with spaces/lib"'], result)
+    end
+
+    def test_add_search_path_if_not_included_adds_to_empty_array
+        current_paths = []
+        new_path = "/new/path"
+        result = ReactNativePodsUtils.add_search_path_if_not_included(current_paths, new_path)
+        assert_equal(["/new/path"], result)
+    end
+
     # =============================================== #
     # Test - Create Header Search Path For Frameworks #
     # =============================================== #

packages/react-native/scripts/cocoapods/utils.rb

@@ -538,10 +538,19 @@ def self.remove_flag_for_key(config, flag, key)
     end
 
     def self.add_search_path_if_not_included(current_search_paths, new_search_path)
-        if !current_search_paths.include?(new_search_path)
-            current_search_paths << " #{new_search_path}"
+        new_search_path = new_search_path.strip
+
+        if current_search_paths.is_a?(String)
+            current_search_paths = current_search_paths.strip
+            return "#{current_search_paths} #{new_search_path}" unless current_search_paths.include?(new_search_path)
+        end
+
+        if current_search_paths.is_a?(Array)
+        current_search_paths = current_search_paths.map(&:strip)
+            return current_search_paths << new_search_path unless current_search_paths.include?(new_search_path)
         end
-        return current_search_paths
+
+        current_search_paths
     end
 
     def self.update_header_paths_if_depends_on(target_installation_result, dependency_name, header_paths)