Updated test cases documentation

docs/test_cases/t30007.md

@@ -0,0 +1,62 @@
+# t30007 - Package diagram layout hints test case
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t30007_package:
+    type: package
+    glob:
+      - ../../tests/t30007/t30007.cc
+    include:
+      namespaces:
+        - clanguml::t30007
+    using_namespace:
+      - clanguml::t30007
+    layout:
+      C:
+        - up: 'A::AA'
+        - left: B
+    plantuml:
+      before:
+        - "' t30007 test package diagram"
+```
+## Source code
+File t30007.cc
+```cpp
+namespace clanguml {
+namespace t30007 {
+
+namespace B {
+struct BB {
+};
+}
+
+/// \uml{note[top] Compare layout with t30006.}
+namespace A {
+namespace AA {
+struct A1 {
+    B::BB *b;
+};
+}
+}
+
+namespace C {
+struct CC {
+};
+}
+
+/// \uml{note[bottom] Bottom A note.}
+namespace A {
+namespace AA {
+struct A2 {
+    C::CC *c;
+};
+}
+}
+
+}
+}
+```
+## Generated UML diagrams
+![t30007_package](./t30007_package.png "Package diagram layout hints test case")