Added variable template base class overload pattern sequence diagram test case

tests/t20040/t20040.cc

@@ -23,10 +23,6 @@ void tmain()
     print(1, 3.14, "test"s);
 
     doublePrint("test"s, 2024 / 2);
-
-    // TODO: Add separate test case for variadic class template sequence diagram
-
-    // TODO: Add overload pattern test case
 }
 }
 }

tests/t20042/.clang-uml

@@ -0,0 +1,11 @@
+diagrams:
+  t20042_sequence:
+    type: sequence
+    glob:
+      - t20042.cc
+    include:
+      namespaces:
+        - clanguml::t20042
+    using_namespace: clanguml::t20042
+    from:
+      - function: "clanguml::t20042::tmain()"

tests/t20042/t20042.cc

@@ -0,0 +1,30 @@
+namespace clanguml {
+namespace t20042 {
+struct A { };
+struct AHandler {
+    void handle(A &a) const { }
+    void operator()(A &a) const { handle(a); }
+};
+
+struct B { };
+struct BHandler {
+    void handle(B &b) const { }
+    void operator()(B &b) const { handle(b); }
+};
+
+template <typename... Bases> struct Overload : public Bases... {
+    using Bases::operator()...;
+};
+template <typename... Bases> Overload(Bases...) -> Overload<Bases...>;
+
+void tmain()
+{
+    Overload<AHandler, BHandler> dispatch;
+    A a;
+    B b;
+
+    dispatch(a);
+    dispatch(b);
+}
+}
+}

tests/t20042/test_case.h

@@ -0,0 +1,75 @@
+/**
+ * tests/t20042/test_case.h
+ *
+ * Copyright (c) 2021-2024 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("t20042", "[test-case][sequence]")
+{
+    auto [config, db] = load_config("t20042");
+
+    auto diagram = config.diagrams["t20042_sequence"];
+
+    REQUIRE(diagram->name == "t20042_sequence");
+
+    auto model = generate_sequence_diagram(*db, diagram);
+
+    REQUIRE(model->name() == "t20042_sequence");
+
+    {
+        auto src = generate_sequence_puml(diagram, *model);
+        AliasMatcher _A(src);
+
+        REQUIRE_THAT(src, StartsWith("@startuml"));
+        REQUIRE_THAT(src, EndsWith("@enduml\n"));
+
+        REQUIRE_THAT(src,
+            HasCall(_A("tmain()"), _A("AHandler"), "operator()(A &) const"));
+        REQUIRE_THAT(
+            src, HasCall(_A("AHandler"), _A("AHandler"), "handle(A &) const"));
+        REQUIRE_THAT(src,
+            HasCall(_A("tmain()"), _A("BHandler"), "operator()(B &) const"));
+        REQUIRE_THAT(
+            src, HasCall(_A("BHandler"), _A("BHandler"), "handle(B &) const"));
+
+        save_puml(config.output_directory(), diagram->name + ".puml", src);
+    }
+
+    {
+        auto j = generate_sequence_json(diagram, *model);
+
+        using namespace json;
+
+        save_json(config.output_directory(), diagram->name + ".json", j);
+    }
+
+    {
+        auto src = generate_sequence_mermaid(diagram, *model);
+
+        mermaid::SequenceDiagramAliasMatcher _A(src);
+        using mermaid::HasCall;
+
+        REQUIRE_THAT(src,
+            HasCall(_A("tmain()"), _A("AHandler"), "operator()(A &) const"));
+        REQUIRE_THAT(
+            src, HasCall(_A("AHandler"), _A("AHandler"), "handle(A &) const"));
+        REQUIRE_THAT(src,
+            HasCall(_A("tmain()"), _A("BHandler"), "operator()(B &) const"));
+        REQUIRE_THAT(
+            src, HasCall(_A("BHandler"), _A("BHandler"), "handle(B &) const"));
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", src);
+    }
+}

tests/test_cases.cc

@@ -463,6 +463,7 @@ using namespace clanguml::test::matchers;
 #include "t20039/test_case.h"
 #include "t20040/test_case.h"
 #include "t20041/test_case.h"
+#include "t20042/test_case.h"
 
 ///
 /// Package diagram tests

tests/test_cases.yaml

@@ -337,6 +337,9 @@ test_cases:
     - name: t20041
       title: Test case for recursive variadic template class call
       description:
+    - name: t20042
+      title: Test case for template overload pattern
+      description:
   Package diagrams:
     - name: t30001
       title: Basic package diagram test case