Tests: Add a LibDevTools test suite

Use a fake delegate to cover root, target, inspector, styles, network,
navigation, and accessibility behavior. This is not in-depth, but should
be enough to catch regressions.

Tests/CMakeLists.txt

@@ -21,6 +21,7 @@ add_subdirectory(LibXML)
 add_subdirectory(Meta)
 
 if (ENABLE_GUI_TARGETS)
+    add_subdirectory(LibDevTools)
     add_subdirectory(LibGfx)
     add_subdirectory(LibMedia)
     add_subdirectory(LibWeb)

Tests/LibDevTools/CMakeLists.txt

@@ -0,0 +1,7 @@
+set(TEST_SOURCES
+    TestDevToolsProtocol.cpp
+)
+
+foreach(source IN LISTS TEST_SOURCES)
+    ladybird_test("${source}" LibDevTools LIBS LibDevTools LibHTTP LibRequests LibWeb LibWebView)
+endforeach()