Added support for class friend declarations

tests/t00011/.clanguml

@@ -0,0 +1,12 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00011_class:
+    type: class
+    glob:
+      - ../../tests/t00011/t00011.cc
+    using_namespace:
+      - clanguml::t00011
+    include:
+      namespaces:
+        - clanguml::t00011

tests/t00011/t00011.cc

@@ -0,0 +1,18 @@
+namespace clanguml {
+namespace t00011 {
+
+class B;
+
+class A {
+private:
+    void foo() {}
+    friend class B;
+};
+
+class B {
+public:
+    void foo() { m_a->foo(); }
+    A *m_a;
+};
+}
+}

tests/t00011/test_case.h

@@ -0,0 +1,54 @@
+/**
+ * tests/t00011/test_case.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+TEST_CASE("Test t00011", "[unit-test]")
+{
+    spdlog::set_level(spdlog::level::debug);
+
+    auto [config, db] = load_config("t00011");
+
+    auto diagram = config.diagrams["t00011_class"];
+
+    REQUIRE(diagram->name == "t00011_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00011"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00011::A"));
+    REQUIRE(diagram->should_include("clanguml::t00011::B"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00011_class");
+
+    auto puml = generate_class_puml(diagram, model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+    REQUIRE_THAT(puml, IsClass(_A("A")));
+    REQUIRE_THAT(puml, IsClass(_A("B")));
+
+    REQUIRE_THAT(puml, IsFriend(_A("A"), _A("B")));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/test_cases.cc

@@ -105,6 +105,7 @@ using clanguml::test::matchers::IsClassTemplate;
 using clanguml::test::matchers::IsComposition;
 using clanguml::test::matchers::IsEnum;
 using clanguml::test::matchers::IsField;
+using clanguml::test::matchers::IsFriend;
 using clanguml::test::matchers::IsInnerClass;
 using clanguml::test::matchers::IsInstantiation;
 using clanguml::test::matchers::Private;
@@ -122,3 +123,4 @@ using clanguml::test::matchers::Static;
 #include "t00008/test_case.h"
 #include "t00009/test_case.h"
 #include "t00010/test_case.h"
+#include "t00011/test_case.h"

tests/test_cases.h

@@ -270,6 +270,13 @@ ContainsMatcher IsAssociation(std::string const &from, std::string const &to,
         fmt::format("{} --> {} : {}", from, to, label), caseSensitivity));
 }
 
+ContainsMatcher IsFriend(std::string const &from, std::string const &to,
+    CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
+{
+    return ContainsMatcher(CasedString(
+        fmt::format("{} <.. {} : <<friend>>", from, to), caseSensitivity));
+}
+
 ContainsMatcher IsComposition(std::string const &from, std::string const &to,
     std::string const &label,
     CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)