Fixed friend class root namespace handling

tests/t00045/t00045.cc

@@ -4,6 +4,13 @@ class A {
 class AA {
 };
 
+class AAA {
+};
+
+template <typename T> class AAAA {
+    T t;
+};
+
 namespace ns1 {
 
 class A {
@@ -26,6 +33,9 @@ class D : public ns1::ns2::A {
 class E : public ::A {
 };
 
+class AAA {
+};
+
 class R {
 public:
     A *a;
@@ -33,6 +43,10 @@ public:
     ns1::ns2::A *ns1_ns2_a;
     ::A *root_a;
 
+    friend ::AAA;
+    // TODO:
+    // template<typename T> friend class ::AAAA;
+
     void foo(::AA &aa) { (void)aa; }
 };
 }

tests/t00045/test_case.h

@@ -58,6 +58,12 @@ TEST_CASE("t00045", "[test-case][class]")
 
     REQUIRE_THAT(puml, IsDependency(_A("ns1::ns2::R"), _A("AA")));
 
+    REQUIRE_THAT(puml, IsFriend<Public>(_A("ns1::ns2::R"), _A("AAA")));
+    REQUIRE_THAT(
+        puml, !IsFriend<Public>(_A("ns1::ns2::R"), _A("ns1::ns2::AAA")));
+    // TODO:
+    // REQUIRE_THAT(puml, IsFriend<Public>(_A("ns1::ns2::R"), _A("AAAA<T>")));
+
     save_puml(
         "./" + config.output_directory() + "/" + diagram->name + ".puml", puml);
 }