Added 'to' sequence diagram generator for plantuml and json

tests/t20034/t20034.cc

@@ -1,4 +1,5 @@
 #include <cstdint>
+
 namespace clanguml {
 namespace t20034 {
 struct A {

tests/t20036/.clang-uml

@@ -0,0 +1,14 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t20036_sequence:
+    type: sequence
+    glob:
+      - ../../tests/t20036/t20036.cc
+    include:
+      namespaces:
+        - clanguml::t20036
+    using_namespace:
+      - clanguml::t20036
+    to:
+      - function: "clanguml::t20036::A::a2()"

tests/t20036/t20036.cc

@@ -0,0 +1,44 @@
+#include <cstdint>
+
+namespace clanguml {
+namespace t20036 {
+struct A {
+    void a1() { }
+    void a2() { }
+    void a3() { }
+};
+
+struct B {
+    void b1() { a.a2(); }
+    void b2() { a.a2(); }
+    void b3() { a.a3(); }
+
+    A a;
+};
+
+struct C {
+    void c1() { b.b1(); }
+    void c2() { b.b2(); }
+    void c3()
+    {
+        if (reinterpret_cast<uint64_t>(&b) == 0xbadc0de)
+            c3();
+        else
+            c2();
+    }
+
+    void c4() { b.b2(); }
+
+    B b;
+};
+
+struct D {
+    void d1() { c.c2(); }
+    void d2() { c.c2(); }
+    void d3() { a.a2(); }
+
+    A a;
+    C c;
+};
+}
+}

tests/t20036/test_case.h

@@ -0,0 +1,73 @@
+/**
+ * tests/t20036/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("t20036", "[test-case][sequence]")
+{
+    auto [config, db] = load_config("t20036");
+
+    auto diagram = config.diagrams["t20036_sequence"];
+
+    REQUIRE(diagram->name == "t20036_sequence");
+
+    auto model = generate_sequence_diagram(*db, diagram);
+
+    REQUIRE(model->name() == "t20036_sequence");
+
+    {
+        auto puml = generate_sequence_puml(diagram, *model);
+        AliasMatcher _A(puml);
+
+        REQUIRE_THAT(puml, StartsWith("@startuml"));
+        REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+        REQUIRE_THAT(puml, HasCall(_A("C"), _A("C"), "c2()"));
+        REQUIRE_THAT(puml, HasCall(_A("C"), _A("B"), "b2()"));
+        REQUIRE_THAT(puml, HasCall(_A("B"), _A("A"), "a2()"));
+
+        REQUIRE_THAT(puml, HasCall(_A("C"), _A("B"), "b2()"));
+        REQUIRE_THAT(puml, HasCall(_A("B"), _A("A"), "a2()"));
+
+        REQUIRE_THAT(puml, HasCall(_A("D"), _A("A"), "a2()"));
+
+        REQUIRE_THAT(puml, HasCall(_A("C"), _A("B"), "b1()"));
+        REQUIRE_THAT(puml, HasCall(_A("B"), _A("A"), "a2()"));
+
+        save_puml(
+            config.output_directory() + "/" + diagram->name + ".puml", puml);
+    }
+
+    {
+        auto j = generate_sequence_json(diagram, *model);
+
+        using namespace json;
+
+        REQUIRE(HasMessageChain(j,
+            {{"C::c3()", "C::c2()", "void"}, {"C::c2()", "B::b2()", "void"},
+                {"B::b2()", "A::a2()", "void"}}));
+        REQUIRE(HasMessageChain(j,
+            {{"C::c4()", "B::b2()", "void"}, {"B::b2()", "A::a2()", "void"}}));
+        REQUIRE(HasMessageChain(j, {{"D::d3()", "A::a2()", "void"}}));
+        REQUIRE(HasMessageChain(j,
+            {{"D::d1()", "C::c2()", "void"}, {"C::c2()", "B::b2()", "void"},
+                {"B::b2()", "A::a2()", "void"}}));
+        REQUIRE(HasMessageChain(j,
+            {{"C::c1()", "B::b1()", "void"}, {"B::b1()", "A::a2()", "void"}}));
+
+        save_json(config.output_directory() + "/" + diagram->name + ".json", j);
+    }
+}

tests/test_cases.cc

@@ -349,6 +349,7 @@ using namespace clanguml::test::matchers;
 #include "t20033/test_case.h"
 #include "t20034/test_case.h"
 #include "t20035/test_case.h"
+#include "t20036/test_case.h"
 
 ///
 /// Package diagram tests

tests/test_cases.yaml

@@ -299,11 +299,14 @@ test_cases:
       title: Control statement text in sequence diagram test case
       description:
     - name: t20034
-      title: from_to sequence diagram test case
+      title: Test case for rendering all call chains from one activity to another (from_to)
       description:
     - name: t20035
       title: from_to sequence diagram test case with free functions
       description:
+    - name: t20036
+      title: Test case for rendering all call chains leading to an activity (to)
+      description:
   Package diagrams:
     - name: t30001
       title: Basic package diagram test case