Added layer cake patter

tests/t00019/.clanguml

@@ -0,0 +1,18 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00019_class:
+    type: class
+    glob:
+      - ../../tests/t00019/**.h
+      - ../../tests/t00019/**.cc
+    using_namespace:
+      - clanguml::t00019
+    include:
+      namespaces:
+        - clanguml::t00019
+    plantuml:
+      after:
+        - '@A(Base) <|-- @A(Layer3<LowerLayer>)'
+        - '@A(Layer3<LowerLayer>) <|-- @A(Layer2<LowerLayer>)'
+        - '@A(Layer2<LowerLayer>) <|-- @A(Layer1<LowerLayer>)'

tests/t00019/t00019.cc

@@ -0,0 +1,16 @@
+#include "t00019_base.h"
+#include "t00019_layer1.h"
+#include "t00019_layer2.h"
+#include "t00019_layer3.h"
+
+#include <memory>
+
+namespace clanguml {
+namespace t00019 {
+
+class A {
+public:
+    std::unique_ptr<Layer1<Layer2<Layer3<Base>>>> layers;
+};
+}
+}

tests/t00019/t00019_base.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <string>
+
+namespace clanguml {
+namespace t00019 {
+
+class Base {
+
+    Base() = default;
+
+    virtual ~Base() = default;
+
+    virtual int m1() { return 2; }
+
+    virtual std::string m2() { return "two"; }
+};
+}
+}

tests/t00019/t00019_layer1.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <iostream>
+#include <string>
+
+namespace clanguml {
+namespace t00019 {
+
+template <typename LowerLayer> class Layer1 : public LowerLayer {
+
+    using LowerLayer::LowerLayer;
+
+    int m1() override
+    {
+        std::cout << "m1 called\n";
+        return LowerLayer::m1();
+    }
+
+    std::string m2() override
+    {
+        std::cout << "m2 called\n";
+        return LowerLayer::m2();
+    }
+};
+}
+}

tests/t00019/t00019_layer2.h

@@ -0,0 +1,20 @@
+#pragma once
+
+namespace clanguml {
+namespace t00019 {
+
+template <typename LowerLayer> class Layer2 : public LowerLayer {
+
+    using LowerLayer::LowerLayer;
+
+    using LowerLayer::m1;
+
+    using LowerLayer::m2;
+
+    int all_calls_count() const
+    {
+        return LowerLayer::m1_calls() + LowerLayer::m2_calls();
+    }
+};
+}
+}

tests/t00019/t00019_layer3.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <string>
+
+namespace clanguml {
+namespace t00019 {
+
+template <typename LowerLayer> class Layer3 : public LowerLayer {
+
+    using LowerLayer::LowerLayer;
+
+    virtual int m1() override
+    {
+        m_m1_calls++;
+        return LowerLayer::m1();
+    }
+
+    virtual std::string m2() override
+    {
+        m_m2_calls++;
+        return LowerLayer::m2();
+    }
+
+    int m1_calls() const { return m_m1_calls; }
+
+    int m2_calls() const { return m_m2_calls; }
+
+private:
+    int m_m1_calls{};
+    int m_m2_calls{};
+};
+}
+}

tests/t00019/test_case.h

@@ -0,0 +1,59 @@
+/**
+ * tests/t00019/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("t00019", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00019");
+
+    auto diagram = config.diagrams["t00019_class"];
+
+    REQUIRE(diagram->name == "t00019_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00019"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00019::Layer1"));
+    REQUIRE(diagram->should_include("clanguml::t00019::Layer2"));
+    REQUIRE(diagram->should_include("clanguml::t00019::Layer3"));
+    REQUIRE(diagram->should_include("clanguml::t00019::Base"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00019_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("Base")));
+    REQUIRE_THAT(puml, IsClassTemplate("Layer1", "LowerLayer"));
+    REQUIRE_THAT(puml, IsClassTemplate("Layer2", "LowerLayer"));
+    REQUIRE_THAT(puml, IsClassTemplate("Layer3", "LowerLayer"));
+    REQUIRE_THAT(puml, IsBaseClass(_A("Base"), _A("Layer3<LowerLayer>")));
+    REQUIRE_THAT(
+        puml, IsBaseClass(_A("Layer3<LowerLayer>"), _A("Layer2<LowerLayer>")));
+    REQUIRE_THAT(
+        puml, IsBaseClass(_A("Layer2<LowerLayer>"), _A("Layer1<LowerLayer>")));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/test_cases.cc

@@ -122,6 +122,7 @@ using namespace clanguml::test::matchers;
 #include "t00016/test_case.h"
 #include "t00017/test_case.h"
 #include "t00018/test_case.h"
+#include "t00019/test_case.h"
 
 //
 // Sequence diagram tests

tests/test_cases.yaml

@@ -51,6 +51,9 @@ test_cases:
     - name: t00018
       title: Pimpl pattern
       description:
+    - name: t00019
+      title: Layercake pattern
+      description:
   Sequence diagrams:
     - name: t20001
       title: Basic sequence diagram