Added visitor pattern test case

tests/t00021/.clanguml

@@ -0,0 +1,12 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00021_class:
+    type: class
+    glob:
+      - ../../tests/t00021/t00021.cc
+    using_namespace:
+      - clanguml::t00021
+    include:
+      namespaces:
+        - clanguml::t00021

tests/t00021/t00021.cc

@@ -0,0 +1,50 @@
+#include <memory>
+
+namespace clanguml {
+namespace t00021 {
+
+class A;
+class B;
+
+class Visitor {
+public:
+    virtual ~Visitor() = default;
+    virtual void visit_A(const A &item) const = 0;
+    virtual void visit_B(const B &item) const = 0;
+};
+
+class Visitor1 : public Visitor {
+public:
+    void visit_A(const A &item) const override {}
+    void visit_B(const B &item) const override {}
+};
+
+class Visitor2 : public Visitor {
+public:
+    void visit_A(const A &item) const override {}
+    void visit_B(const B &item) const override {}
+};
+
+class Visitor3 : public Visitor {
+public:
+    void visit_A(const A &item) const override {}
+    void visit_B(const B &item) const override {}
+};
+
+class Item {
+public:
+    virtual ~Item() = default;
+    virtual void accept(const Visitor &visitor) const = 0;
+};
+
+class A : public Item {
+public:
+    void accept(const Visitor &visitor) const override {}
+};
+
+class B : public Item {
+public:
+    void accept(const Visitor &visitor) const override {}
+};
+}
+}

tests/t00021/test_case.h

@@ -0,0 +1,54 @@
+/**
+ * tests/t00021/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("t00021", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00021");
+
+    auto diagram = config.diagrams["t00021_class"];
+
+    REQUIRE(diagram->name == "t00021_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00021"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00021::Visitor"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00021_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, IsAbstractClass(_A("Item")));
+    REQUIRE_THAT(puml, IsAbstractClass(_A("Visitor")));
+    REQUIRE_THAT(puml, IsClass(_A("A")));
+    REQUIRE_THAT(puml, IsClass(_A("B")));
+    REQUIRE_THAT(puml, IsClass(_A("Visitor1")));
+    REQUIRE_THAT(puml, IsClass(_A("Visitor2")));
+    REQUIRE_THAT(puml, IsClass(_A("Visitor3")));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/test_cases.cc

@@ -124,6 +124,7 @@ using namespace clanguml::test::matchers;
 #include "t00018/test_case.h"
 #include "t00019/test_case.h"
 #include "t00020/test_case.h"
+#include "t00021/test_case.h"
 
 //
 // Sequence diagram tests

tests/test_cases.yaml

@@ -57,6 +57,9 @@ test_cases:
     - name: t00020
       title: Abstract factory pattern
       description:
+    - name: t00021
+      title: Visitor pattern
+      description:
   Sequence diagrams:
     - name: t20001
       title: Basic sequence diagram