Updated test cases documentation

docs/test_cases/t40002.md

@@ -23,6 +23,94 @@ diagrams:
         - "' t40002 test include diagram"
 ```
 ## Source code
+File `tests/t40002/src/t40002.cc`
+```cpp
+#include "../include/lib1/lib1.h"
+#include "../include/lib2/lib2.h"
+
+namespace clanguml::t40002 {
+
+int foo() { return lib1::foo() + lib2::foo(); }
+
+}
+```
+File `tests/t40002/src/lib1/lib1.cc`
+```cpp
+#include "../../include/lib1/lib1.h"
+
+#include <string>
+
+namespace clanguml::t40002::lib1 {
+
+int foo0() { return 0; }
+
+int foo1() { return 1; }
+
+int foo() { return foo1(); }
+
+}
+```
+File `tests/t40002/src/lib2/lib2.cc`
+```cpp
+#include "../../include/lib2/lib2.h"
+#include "../../include/lib2/lib2_detail.h"
+
+namespace clanguml::t40002::lib2 {
+
+int foo0() { return 0; }
+
+int foo1() { return 1; }
+
+int foo() { return foo1(); }
+
+int foo22() { return 22; }
+
+} // namespace clanguml::t40002::lib2
+```
+File `tests/t40002/include/lib1/lib1.h`
+```cpp
+#pragma once
+
+#include "../lib2/lib2.h"
+
+#include <string>
+
+namespace clanguml::t40002::lib1 {
+
+int foo0();
+
+int foo1();
+
+int foo();
+
+}
+```
+File `tests/t40002/include/lib2/lib2.h`
+```cpp
+#pragma once
+
+#include "lib2_detail.h"
+
+namespace clanguml::t40002::lib2 {
+
+int foo2();
+
+int foo3();
+
+int foo();
+
+}
+```
+File `tests/t40002/include/lib2/lib2_detail.h`
+```cpp
+#pragma once
+
+namespace clanguml::t40002::lib2::detail {
+
+int foo22();
+
+}
+```
 ## Generated PlantUML diagrams
 ![t40002_include](./t40002_include.svg "Cyclic include graph diagram test case")
 ## Generated Mermaid diagrams