Integrate Test Framework

Per the discussion in #12, we agreed on using GTest as iceberg-cpp's
unit test framework.

Signed-off-by: Junwang Zhao <[email protected]>

Author: zhjwpku

CMakeLists.txt

@@ -43,6 +43,7 @@ include(BuildUtils)
 include(ExternalProject)
 include(FindPackageHandleStandardArgs)
 include(GNUInstallDirs)
+include(FetchContent)
 
 set(ICEBERG_API_DIR "${CMAKE_SOURCE_DIR}/api")
 set(ICEBERG_INSTALL_LIBDIR "${CMAKE_INSTALL_LIBDIR}")

README.md

@@ -28,13 +28,14 @@ C++ implementation of [Apache Iceberg™](https://iceberg.apache.org/).
 
 ## Build
 
-### Build and Install Core Libraries
+### Build, Run Test and Install Core Libraries
 
 ```bash
 cd iceberg-cpp
 mkdir build && cd build
 cmake .. -DCMAKE_INSTALL_PREFIX=/tmp/iceberg -DICEBERG_BUILD_STATIC=ON -DICEBERG_BUILD_SHARED=ON
 cmake --build .
+ctest --build .
 cmake --install .
 ```
 

cmake_modules/FindGTestAlt.cmake

@@ -0,0 +1,28 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+find_package(GTest)
+
+if(GTest_FOUND)
+  return()
+endif()
+
+fetchcontent_declare(googletest
+                     GIT_REPOSITORY https://github.com/google/googletest.git
+                     GIT_TAG b514bdc898e2951020cbdca1304b75f5950d1f59 # release-1.15.2
+)
+fetchcontent_makeavailable(googletest)

test/CMakeLists.txt

@@ -14,3 +14,7 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+
+include(FindGTestAlt)
+
+add_subdirectory(core)

test/core/CMakeLists.txt

@@ -0,0 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+add_executable(core_gtest)
+target_sources(core_gtest PRIVATE core_gtest.cc)
+target_link_libraries(core_gtest PRIVATE iceberg_core_static GTest::gtest_main)
+target_include_directories(core_gtest PRIVATE "${ICEBERG_API_DIR}")
+add_test(NAME core_gtest COMMAND core_gtest)

test/core/core_gtest.cc

@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+#include <gtest/gtest.h>
+
+#include "iceberg/table.h"
+
+TEST(TableTest, TestTableCons) {
+  auto table = iceberg::Table::create();
+  EXPECT_EQ(table->print(), "DemoTable");
+}