request parser rewrite + added tests

* rewrote request parser, now more simplified and theoretically faster
* added gtest and an example test to measure parser times

CMakeLists.txt

@@ -15,7 +15,7 @@ add_custom_target(build-version
 
 add_custom_target(build-supplemental 
     COMMAND cd ../build_supp && python3 ./error_gen.py
-    COMMAND mkdir www && cp -r ../default_www/regular/* ./www/
+    COMMAND mkdir -p www && cp -r ../default_www/regular/* ./www/
     DEPENDS build_supp/version.txt ../default_www/regular/* build_supp/error_gen.py build-version
     COMMENT "Generated supplemental build files (default www dir + error pages)"
 )
@@ -38,3 +38,38 @@ add_dependencies(anthracite-bin anthracite)
 add_executable(anthracite-api-bin src/api_main.cpp) 
 target_link_libraries(anthracite-api-bin anthracite)
 
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
+)
+
+FetchContent_MakeAvailable(googletest)
+
+file(GLOB TESTS_SRC CONFIGURE_DEPENDS "tests/*.cpp")
+enable_testing()
+
+add_custom_target(test_files
+    COMMAND cp -r ../tests/test_files . 
+    DEPENDS ../tests/test_files/* 
+    COMMENT "Copied test resource files"
+)
+
+add_executable(
+  tests
+  ${TESTS_SRC}
+)
+add_dependencies(tests anthracite)
+add_dependencies(tests test_files)
+
+target_link_libraries(
+  tests
+  GTest::gtest_main
+)
+target_link_libraries(
+  tests
+  anthracite
+)
+
+include(GoogleTest)
+gtest_discover_tests(tests)