Make sure sequence diagram messages generated during static variable initialization are rendered only once

tests/t20037/.clang-uml

@@ -0,0 +1,14 @@
+compilation_database_dir: ..
+output_directory: diagrams
+diagrams:
+  t20037_sequence:
+    type: sequence
+    glob:
+      - ../../tests/t20037/t20037.cc
+    include:
+      namespaces:
+        - clanguml::t20037
+    using_namespace:
+      - clanguml::t20037
+    from:
+      - function: "clanguml::t20037::tmain(int,char **)"

tests/t20037/t20037.cc

@@ -0,0 +1,38 @@
+namespace clanguml {
+namespace t20037 {
+
+struct A {
+    A()
+        : a{100}
+    {
+    }
+
+    int a;
+};
+
+struct B {
+    int get() { return b; }
+
+    int b{100};
+};
+
+B initb() { return B{}; }
+
+int c() { return 1; }
+
+int a()
+{
+    static A a;
+    static B b = initb();
+
+    return a.a + b.get() + c();
+}
+
+void tmain(int argc, char **argv)
+{
+    auto a1 = a();
+    auto a2 = a();
+    auto a3 = a();
+}
+}
+}

tests/t20037/test_case.h

@@ -0,0 +1,75 @@
+/**
+ * tests/t20037/test_case.h
+ *
+ * Copyright (c) 2021-2023 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("t20037", "[test-case][sequence]")
+{
+    auto [config, db] = load_config("t20037");
+
+    auto diagram = config.diagrams["t20037_sequence"];
+
+    REQUIRE(diagram->name == "t20037_sequence");
+
+    auto model = generate_sequence_diagram(*db, diagram);
+
+    REQUIRE(model->name() == "t20037_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(int,char **)"), _A("a()"), ""));
+        REQUIRE_THAT(src, HasCall(_A("a()"), _A("initb()"), ""));
+        REQUIRE_THAT(src, HasCall(_A("a()"), _A("B"), "get()"));
+        REQUIRE_THAT(src, HasCall(_A("a()"), _A("c()"), ""));
+
+        save_puml(config.output_directory(), diagram->name + ".puml", src);
+    }
+
+    {
+        auto j = generate_sequence_json(diagram, *model);
+
+        using namespace json;
+
+        std::vector<int> messages = {
+            FindMessage(j, "tmain(int,char **)", "a()", ""),
+            FindMessage(j, "a()", "initb()", ""),
+            FindMessage(j, "a()", "B", "get()"),
+            FindMessage(j, "a()", "c()", "")};
+
+        REQUIRE(std::is_sorted(messages.begin(), messages.end()));
+
+        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(int,char **)"), _A("a()"), ""));
+        REQUIRE_THAT(src, HasCall(_A("a()"), _A("initb()"), ""));
+        REQUIRE_THAT(src, HasCall(_A("a()"), _A("B"), "get()"));
+        REQUIRE_THAT(src, HasCall(_A("a()"), _A("c()"), ""));
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", src);
+    }
+}

tests/test_cases.cc

@@ -423,6 +423,7 @@ using namespace clanguml::test::matchers;
 #include "t20034/test_case.h"
 #include "t20035/test_case.h"
 #include "t20036/test_case.h"
+#include "t20037/test_case.h"
 
 ///
 /// Package diagram tests

tests/test_cases.yaml

@@ -307,6 +307,9 @@ test_cases:
     - name: t20036
       title: Test case for rendering all call chains leading to an activity (to)
       description:
+    - name: t20037
+      title: Test case checking if activities in static variable declarations appear only once
+      description:
   Package diagrams:
     - name: t30001
       title: Basic package diagram test case