Added Curiously Recurring Template Pattern sequence diagram test case

tests/t20019/.clang-uml

@@ -0,0 +1,14 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t20019_sequence:
+    type: sequence
+    glob:
+      - ../../tests/t20019/t20019.cc
+    include:
+      namespaces:
+        - clanguml::t20019
+    using_namespace:
+      - clanguml::t20019
+    start_from:
+      - function: "clanguml::t20019::tmain()"

tests/t20019/t20019.cc

@@ -0,0 +1,34 @@
+#include <cstdio>
+
+namespace clanguml {
+namespace t20019 {
+
+// From https://en.cppreference.com/w/cpp/language/crtp
+
+template <class Derived> struct Base {
+    void name() { (static_cast<Derived *>(this))->impl(); }
+};
+
+struct D1 : public Base<D1> {
+    void impl() { std::puts("D1::impl()"); }
+};
+
+struct D2 : public Base<D2> {
+    void impl() { std::puts("D2::impl()"); }
+};
+
+void tmain()
+{
+    Base<D1> b1;
+    b1.name();
+    Base<D2> b2;
+    b2.name();
+
+    D1 d1;
+    d1.name();
+    D2 d2;
+    d2.name();
+}
+
+}
+}

tests/t20019/test_case.h

@@ -0,0 +1,45 @@
+/**
+ * tests/t20019/test_case.h
+ *
+ * Copyright (c) 2021-2022 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("t20019", "[test-case][sequence]")
+{
+    auto [config, db] = load_config("t20019");
+
+    auto diagram = config.diagrams["t20019_sequence"];
+
+    REQUIRE(diagram->name == "t20019_sequence");
+
+    auto model = generate_sequence_diagram(*db, diagram);
+
+    REQUIRE(model->name() == "t20019_sequence");
+
+    auto puml = generate_sequence_puml(diagram, *model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+    // Check if all calls exist
+    REQUIRE_THAT(puml, HasCall(_A("tmain()"), _A("Base<D1>"), "name()"));
+    REQUIRE_THAT(puml, HasCall(_A("Base<D1>"), _A("D1"), "impl()"));
+    REQUIRE_THAT(puml, HasCall(_A("tmain()"), _A("Base<D2>"), "name()"));
+    REQUIRE_THAT(puml, HasCall(_A("Base<D2>"), _A("D2"), "impl()"));
+
+    save_puml(
+        "./" + config.output_directory() + "/" + diagram->name + ".puml", puml);
+}

tests/test_cases.cc

@@ -265,6 +265,7 @@ using namespace clanguml::test::matchers;
 #include "t20016/test_case.h"
 #include "t20017/test_case.h"
 #include "t20018/test_case.h"
+#include "t20019/test_case.h"
 
 ///
 /// Package diagram tests

tests/test_cases.yaml

@@ -202,6 +202,9 @@ test_cases:
     - name: t20018
       title: Recursive template sequence diagram test case
       description:
+    - name: t20019
+      title: Curiously Recurring Template Pattern sequence diagram test case
+      description:
   Package diagrams:
     - name: t30001
       title: Basic package diagram test case