Adding example_json test (#1490)

Author: stephenberry

README.md

@@ -80,7 +80,11 @@ BEVE size: 611 bytes
 
 *BEVE packs more efficiently than JSON, so transporting the same data is even faster.
 
-## Example
+## Examples
+
+> [!TIP]
+>
+> See the [example_json](https://github.com/stephenberry/glaze/blob/main/tests/example_json/example_json.cpp) unit test for basic examples of how to use Glaze. See [json_test](https://github.com/stephenberry/glaze/blob/main/tests/json_test/json_test.cpp) for an extensive test of features.
 
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tests/CMakeLists.txt

@@ -59,6 +59,7 @@ add_subdirectory(cli_menu_test)
 add_subdirectory(compare_test)
 add_subdirectory(csv_test)
 add_subdirectory(eigen_test)
+add_subdirectory(example_json)
 add_subdirectory(exceptions_test)
 add_subdirectory(int_parsing)
 add_subdirectory(json_conformance)

tests/example_json/CMakeLists.txt

@@ -0,0 +1,14 @@
+project(example_json)
+
+add_executable(${PROJECT_NAME} ${PROJECT_NAME}.cpp)
+
+target_link_libraries(${PROJECT_NAME} PRIVATE glz_test_common)
+
+if (MINGW)
+    target_compile_options(${PROJECT_NAME} PRIVATE "-Wa,-mbig-obj")
+endif ()
+
+add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})
+
+target_code_coverage(${PROJECT_NAME} AUTO ALL)
+