Ichthyostega
3321e5bc6b
All of the existing "simple" tests for the »Diff Framework« are way to much low-level; they might indeed be elementary, but not introductory and simple to grasp. We need a very simplistic example to show off the idea of mutation by diff, and this simple example can then be used to build further usage test cases. My actual goal for #1206 to have such a very basic usage demonstration and then to attach a listener to this setup, and verify it is actually triggered. PS: the name "GenNodeBasic_test" is somewhat pathetic, this test covers a lot of ground and is anything but "basic". GenNode in fact became a widely used fundamental data structure within Lumiera, and -- admittedly -- the existing implementation might be somewhat simplistic, while the whole concept as such is demanding, and we should accept that as the state of affairs
150 lines
4.3 KiB
C++
150 lines
4.3 KiB
C++
/*
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TreeMutator(Test) - customisable intermediary to abstract tree changing operations
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Copyright (C) Lumiera.org
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2015, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file tree-mutator-test.cpp
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** unit test \ref TreeMutator_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/format-util.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/diff/tree-mutator.hpp"
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#include "lib/format-cout.hpp"
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#include "lib/format-util.hpp"
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#include "lib/util.hpp"
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#include <string>
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#include <vector>
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using util::isnil;
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using util::join;
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using util::typeStr;
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using std::string;
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using std::vector;
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namespace lib {
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namespace diff{
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namespace test{
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/*****************************************************************************//**
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* @test Demonstrate a customisable component for flexible bindings
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* to enable generic tree changing and mutating operations to
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* arbitrary hierarchical data structures.
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* - we use lambdas to link into our private implementation
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* - this test demonstrates the behaviour of an attribute setter
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* - plus some of the _primitive operations_ available on collections
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*
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* @see TreeMutator
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* @see DiffComplexApplication_test a way more complex usage scenario
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* @see GenNode_test
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* @see GenericRecord_test
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*/
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class TreeMutator_test : public Test
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{
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virtual void
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run (Arg)
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{
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simpleAttributeBinding();
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simpleCollectionBinding();
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}
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void
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simpleAttributeBinding()
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{
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MARK_TEST_FUN;
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string localData;
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auto mutator =
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TreeMutator::build()
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.change("data", [&](string val)
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{
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cout << "\"data\" closure received something "<<val<<endl;
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localData = val;
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});
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cout << "concrete TreeMutator size=" << sizeof(mutator)
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<< " type="<< typeStr(mutator)
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<< endl;
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mutator.init();
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CHECK (isnil (localData));
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string testValue{"that would be acceptable"};
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mutator.assignElm ({"lore", testValue});
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CHECK ( isnil (localData)); // nothing happens, nothing changed
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mutator.assignElm ({"data", testValue});
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CHECK (!isnil (localData));
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cout << "localData changed to: "<<localData<<endl;
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CHECK (localData == "that would be acceptable");
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}
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void
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simpleCollectionBinding()
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{
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MARK_TEST_FUN;
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vector<string> values;
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values.push_back("a");
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values.push_back("b");
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cout << join(values) <<endl;
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CHECK (2 == values.size());
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CHECK ("a, b" == join(values));
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auto mutator =
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TreeMutator::build()
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.attach (collection(values));
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cout << "concrete TreeMutator size=" << sizeof(mutator)
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<< " type="<< typeStr(mutator)
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<< endl;
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mutator.init();
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CHECK (isnil (values));
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CHECK (mutator.matchSrc (GenNode("a")));
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mutator.skipSrc (GenNode("a"));
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CHECK (mutator.matchSrc (GenNode("b")));
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CHECK (mutator.injectNew (GenNode("c")));
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CHECK (mutator.acceptSrc (GenNode("b")));
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cout << join(values) <<endl;
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CHECK (2 == values.size());
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CHECK ("c, b" == join(values));
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}
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};
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/** Register this test class... */
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LAUNCHER (TreeMutator_test, "unit common");
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}}} // namespace lib::diff::test
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