Updated test cases documentation

docs/test_cases/t00046.md

@@ -0,0 +1,61 @@
+# t00046 - Test case for root namespace handling with packages
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00046_class:
+    type: class
+    generate_packages: true
+    glob:
+      - ../../tests/t00046/t00046.cc
+    exclude:
+      namespaces:
+        - std
+```
+## Source code
+File t00046.cc
+```cpp
+class A {
+};
+
+class AA {
+};
+
+namespace ns1 {
+
+class A {
+};
+
+namespace ns2 {
+
+class A {
+};
+
+class B : public A {
+};
+
+class C : public ns1::A {
+};
+
+class D : public ns1::ns2::A {
+};
+
+class E : public ::A {
+};
+
+class R {
+public:
+    A *a;
+    ns1::A *ns1_a;
+    ns1::ns2::A *ns1_ns2_a;
+    ::A *root_a;
+
+    void foo(::AA &aa) { (void)aa; }
+};
+}
+}
+
+```
+## Generated UML diagrams
+![t00046_class](./t00046_class.svg "Test case for root namespace handling with packages")