Added basic include diagram test case

tests/t40001/.clang-uml

@@ -3,8 +3,17 @@ output_directory: puml
 diagrams:
   t40001_include:
     type: include
+    # Provide the files to parse in order to look
+    # for #include directives
     glob:
-      - ../../tests/t40001/t40001.cc
+      - ../../tests/t40001/**/*.cc
+      - ../../tests/t40001/**/*.h
+    # Render the paths relative to this directory
+    relative_to: ../../tests/t40001
+    include:
+      # Include only headers belonging to these paths
+      paths:
+        - ../../tests/t40001
     plantuml:
       before:
         - "' t40001 test include diagram"

tests/t40001/include/lib1/lib1.h

@@ -0,0 +1,7 @@
+#pragma once
+
+namespace clanguml::t40001::lib1 {
+
+int foo2() { return 0; }
+
+}

tests/t40001/src/t40001.cc

@@ -1,7 +1,7 @@
 #include <string>
 #include <vector>
 
-#include "include/t40001_include1.h"
+#include "../include/t40001_include1.h"
 
 namespace clanguml {
 namespace t40001 {

tests/t40001/test_case.h

@@ -35,6 +35,14 @@ TEST_CASE("t40001", "[test-case][package]")
     REQUIRE_THAT(puml, StartsWith("@startuml"));
     REQUIRE_THAT(puml, EndsWith("@enduml\n"));
 
+    REQUIRE_THAT(puml, IsFolder("lib1"));
+    REQUIRE_THAT(puml, IsFile("lib1.h"));
+    REQUIRE_THAT(puml, IsFile("t40001.cc"));
+    REQUIRE_THAT(puml, IsFile("t40001_include1.h"));
+
+    REQUIRE_THAT(puml, IsAssociation(_A("t40001.cc"), _A("t40001_include1.h")));
+    REQUIRE_THAT(puml, IsAssociation(_A("t40001_include1.h"), _A("lib1.h")));
+
     save_puml(
         "./" + config.output_directory() + "/" + diagram->name + ".puml", puml);
 }