Added simple test case template generator

util/templates/test_cases/.clang-uml

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+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  {{ name }}_{{ type }}:
+    type: {{ type }}
+    glob:
+      - ../../tests/{{ name }}/{{ name }}.cc
+    include:
+      namespaces:
+        - clanguml::{{ name }}

util/templates/test_cases/t00000.cc

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+namespace clanguml {
+namespace {{ name }}
+{
+}
+}

util/templates/test_cases/test_case.h

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+/**
+ * tests/{{ name }}/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("{{ name }}", "[test-case][{{ type }}]")
+{
+    auto [config, db] = load_config("{{ name }}");
+
+    auto diagram = config.diagrams["{{ name }}_{{ type }}"];
+
+    REQUIRE(diagram->name == "{{ name }}_{{ type }}");
+
+    auto model = generate_{{ type }}_diagram(db, diagram);
+
+    REQUIRE(model->name() == "{{ name }}_{{ type }}");
+
+    auto puml = generate_{{ type }}_puml(diagram, *model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+    {{ examples }}
+
+    save_puml(
+        "./" + config.output_directory() + "/" + diagram->name + ".puml", puml);
+}