Added header dependency tests.

CMakeLists.txt

@@ -12,6 +12,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 add_library(spdlog INTERFACE)
 
 option(SPDLOG_BUILD_EXAMPLES "Build examples" OFF)
+option(SPDLOG_BUILD_TESTS "Build tests" OFF)
 
 target_include_directories(
     spdlog
@@ -20,11 +21,17 @@ target_include_directories(
     "$<INSTALL_INTERFACE:include>"
 )
 
+set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
+
 if(SPDLOG_BUILD_EXAMPLES)
   enable_testing()
   add_subdirectory(example)
 endif()
 
+if(SPDLOG_BUILD_TESTS)
+	add_subdirectory(tests)
+endif()
+
 ### Install ###
 # * https://github.com/forexample/package-example
 set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")

tests/CMakeLists.txt

@@ -0,0 +1,21 @@
+#
+# Tests
+#
+
+enable_testing()
+
+# Build Catch unit tests
+#function(add_catch_test _testname)
+#	add_executable(${_testname} ${_testname}.cpp)
+#	target_link_libraries(${_testname} Catch)
+#	add_test(NAME test_${_testname} COMMAND ${_testname})
+#endfunction()
+#
+#file(GLOB catch_tests LIST_DIRECTORIES false *.cpp)
+#foreach(catch_test IN LIST catch_tests)
+#	add_catch_test(${catch_test})
+#endforeach()
+
+# Ensure headers include their own dependencies
+add_subdirectory(header_dependencies)
+

tests/header_dependencies/CMakeLists.txt

@@ -0,0 +1,58 @@
+#
+# Ensure all headers include all dependencies
+#
+
+set(IGNORED_HEADERS "")
+
+set(COMMON_TEST_LIBRARIES spdlog)
+
+add_custom_target(header_dependencies)
+
+file(GLOB_RECURSE headers RELATIVE "${HEADER_BASE}" ${HEADER_BASE}/*.h)
+set(test_index 0)
+foreach(HEADER ${headers})
+    # Sample of relevant variables computed here
+    # HEADER: details/line_logger_impl.h
+    # symbolname: spdlog_details_line_logger_impl
+
+    # Compute symbolname
+    string(REPLACE ".h" "" symbolname "${HEADER}")
+    string(MAKE_C_IDENTIFIER "${symbolname}" symbolname)
+
+    list(FIND IGNORED_HEADERS "${HEADER}" _index)
+    # If we didn't explicitly ignore this and if we built this target
+    if(${_index} EQUAL -1)
+        #message(STATUS "${HEADER}: '${symbolname}'")
+
+        set(extension cpp)
+
+        # Name the test and output file with a number, to dodge Windows path length limits.
+        # Call it header, instead of test, to avoid polluting the 'executable namespace'
+        set(test_name "header_${extension}_${test_index}")
+
+        set(source_file "${CMAKE_CURRENT_SOURCE_DIR}/main.${extension}")
+
+        add_executable(${test_name} "${source_file}")
+        target_compile_definitions(${test_name} PRIVATE HEADER_TO_TEST="${HEADER}")
+        target_include_directories(${test_name}
+            PRIVATE
+            ${BUILDTREE_HEADER_BASE}
+            ${HEADER_BASE})
+
+        set_target_properties(${test_name} PROPERTIES
+            FOLDER "Header dependency tests")
+
+        target_link_libraries(${test_name}
+            PRIVATE
+            ${COMMON_TEST_LIBRARIES}
+            ${LIBRARIES_${symbolname}}
+            ${LIBRARIES_${libname}})
+
+        add_test(NAME ${test_name}_builds COMMAND ${test_name})
+        add_dependencies(header_dependencies ${test_name})
+
+        math(EXPR test_index "${test_index} + 1")
+    endif()
+endforeach()
+
+

tests/header_dependencies/main.c

@@ -0,0 +1,7 @@
+
+#include HEADER_TO_TEST
+
+int main(int argc, char** argv)
+{
+    return 0;
+}

tests/header_dependencies/main.cpp

@@ -0,0 +1,4 @@
+
+#include HEADER_TO_TEST
+
+int main(int argc, char *argv[]) { return 0; }