Tests: Modularize unit testing

Split unit tests into separate files under src/unittest/
Give better unittest diagnostics
Clean up some code

src/unittest/test_compression.cpp

@@ -0,0 +1,172 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "test.h"
+
+#include <sstream>
+
+#include "irrlichttypes_extrabloated.h"
+#include "log.h"
+#include "serialization.h"
+#include "nodedef.h"
+#include "noise.h"
+
+class TestCompression : public TestBase {
+public:
+	TestCompression() { TestManager::registerTestModule(this); }
+	const char *getName() { return "TestCompression"; }
+
+	void runTests(IGameDef *gamedef);
+
+	void testRLECompression();
+	void testZlibCompression();
+	void testZlibLargeData();
+};
+
+static TestCompression g_test_instance;
+
+void TestCompression::runTests(IGameDef *gamedef)
+{
+	TEST(testRLECompression);
+	TEST(testZlibCompression);
+	TEST(testZlibLargeData);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+void TestCompression::testRLECompression()
+{
+	SharedBuffer<u8> fromdata(4);
+	fromdata[0]=1;
+	fromdata[1]=5;
+	fromdata[2]=5;
+	fromdata[3]=1;
+
+	std::ostringstream os(std::ios_base::binary);
+	compress(fromdata, os, 0);
+
+	std::string str_out = os.str();
+
+	infostream << "str_out.size()="<<str_out.size()<<std::endl;
+	infostream << "TestCompress: 1,5,5,1 -> ";
+	for (u32 i = 0; i < str_out.size(); i++)
+		infostream << (u32)str_out[i] << ",";
+	infostream << std::endl;
+
+	UASSERT(str_out.size() == 10);
+
+	UASSERT(str_out[0] == 0);
+	UASSERT(str_out[1] == 0);
+	UASSERT(str_out[2] == 0);
+	UASSERT(str_out[3] == 4);
+	UASSERT(str_out[4] == 0);
+	UASSERT(str_out[5] == 1);
+	UASSERT(str_out[6] == 1);
+	UASSERT(str_out[7] == 5);
+	UASSERT(str_out[8] == 0);
+	UASSERT(str_out[9] == 1);
+
+	std::istringstream is(str_out, std::ios_base::binary);
+	std::ostringstream os2(std::ios_base::binary);
+
+	decompress(is, os2, 0);
+	std::string str_out2 = os2.str();
+
+	infostream << "decompress: ";
+	for (u32 i = 0; i < str_out2.size(); i++)
+		infostream << (u32)str_out2[i] << ",";
+	infostream << std::endl;
+
+	UASSERTEQ(size_t, str_out2.size(), fromdata.getSize());
+
+	for (u32 i = 0; i < str_out2.size(); i++)
+		UASSERT(str_out2[i] == fromdata[i]);
+}
+
+void TestCompression::testZlibCompression()
+{
+	SharedBuffer<u8> fromdata(4);
+	fromdata[0]=1;
+	fromdata[1]=5;
+	fromdata[2]=5;
+	fromdata[3]=1;
+
+	std::ostringstream os(std::ios_base::binary);
+	compress(fromdata, os, SER_FMT_VER_HIGHEST_READ);
+
+	std::string str_out = os.str();
+
+	infostream << "str_out.size()=" << str_out.size() <<std::endl;
+	infostream << "TestCompress: 1,5,5,1 -> ";
+	for (u32 i = 0; i < str_out.size(); i++)
+		infostream << (u32)str_out[i] << ",";
+	infostream << std::endl;
+
+	std::istringstream is(str_out, std::ios_base::binary);
+	std::ostringstream os2(std::ios_base::binary);
+
+	decompress(is, os2, SER_FMT_VER_HIGHEST_READ);
+	std::string str_out2 = os2.str();
+
+	infostream << "decompress: ";
+	for (u32 i = 0; i < str_out2.size(); i++)
+		infostream << (u32)str_out2[i] << ",";
+	infostream << std::endl;
+
+	UASSERTEQ(size_t, str_out2.size(), fromdata.getSize());
+
+	for (u32 i = 0; i < str_out2.size(); i++)
+		UASSERT(str_out2[i] == fromdata[i]);
+}
+
+void TestCompression::testZlibLargeData()
+{
+	infostream << "Test: Testing zlib wrappers with a large amount "
+		"of pseudorandom data" << std::endl;
+
+	u32 size = 50000;
+	infostream << "Test: Input size of large compressZlib is "
+		<< size << std::endl;
+
+	std::string data_in;
+	data_in.resize(size);
+	PseudoRandom pseudorandom(9420);
+	for (u32 i = 0; i < size; i++)
+		data_in[i] = pseudorandom.range(0, 255);
+
+	std::ostringstream os_compressed(std::ios::binary);
+	compressZlib(data_in, os_compressed);
+	infostream << "Test: Output size of large compressZlib is "
+		<< os_compressed.str().size()<<std::endl;
+
+	std::istringstream is_compressed(os_compressed.str(), std::ios::binary);
+	std::ostringstream os_decompressed(std::ios::binary);
+	decompressZlib(is_compressed, os_decompressed);
+	infostream << "Test: Output size of large decompressZlib is "
+		<< os_decompressed.str().size() << std::endl;
+
+	std::string str_decompressed = os_decompressed.str();
+	UASSERTEQ(size_t, str_decompressed.size(), data_in.size());
+
+	for (u32 i = 0; i < size && i < str_decompressed.size(); i++) {
+		UTEST(str_decompressed[i] == data_in[i],
+				"index out[%i]=%i differs from in[%i]=%i",
+				i, str_decompressed[i], i, data_in[i]);
+	}
+}