Updated test cases documentation

docs/test_cases/t00025.md

@@ -0,0 +1,61 @@
+# t00025 - Template proxy pattern
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00025_class:
+    type: class
+    glob:
+      - ../../tests/t00025/t00025.cc
+    using_namespace:
+      - clanguml::t00025
+    include:
+      namespaces:
+        - clanguml::t00025
+
+```
+## Source code
+File t00025.cc
+```cpp
+#include <memory>
+
+namespace clanguml {
+namespace t00025 {
+
+class Target1 {
+public:
+    void m1() {}
+    void m2() {}
+};
+
+class Target2 {
+public:
+    void m1() {}
+    void m2() {}
+};
+
+template <typename T> class Proxy {
+public:
+    Proxy(std::shared_ptr<T> target)
+        : m_target{std::move(target)}
+    {
+    }
+    void m1() { m_target->m1(); }
+    void m2() { m_target->m2(); }
+
+private:
+    std::shared_ptr<T> m_target;
+};
+
+class ProxyHolder {
+public:
+    Proxy<Target1> proxy1;
+    Proxy<Target2> proxy2;
+};
+}
+}
+
+```
+## Generated UML diagrams
+![t00025_class](./t00025_class.png "Template proxy pattern")