add unit tester for MyPage class

unittest/utils/CMakeLists.txt

@@ -2,6 +2,10 @@ add_executable(test_tokenizer test_tokenizer.cpp)
 target_link_libraries(test_tokenizer PRIVATE lammps GTest::GMockMain GTest::GMock GTest::GTest)
 add_test(Tokenizer test_tokenizer)
 
+add_executable(test_my_page test_my_page.cpp)
+target_link_libraries(test_my_page PRIVATE lammps GTest::GMockMain GTest::GMock GTest::GTest)
+add_test(MyPage test_my_page)
+
 add_executable(test_utils test_utils.cpp)
 target_link_libraries(test_utils PRIVATE lammps GTest::GMockMain GTest::GMock GTest::GTest)
 add_test(Utils test_utils)

unittest/utils/test_my_page.cpp

@@ -0,0 +1,96 @@
+/* ----------------------------------------------------------------------
+   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+   http://lammps.sandia.gov, Sandia National Laboratories
+   Steve Plimpton, sjplimp@sandia.gov
+
+   Copyright (2003) Sandia Corporation.  Under the terms of Contract
+   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
+   certain rights in this software.  This software is distributed under
+   the GNU General Public License.
+
+   See the README file in the top-level LAMMPS directory.
+------------------------------------------------------------------------- */
+
+#include "lmptype.h"
+#include "my_page.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+using namespace LAMMPS_NS;
+
+TEST(MyPage, int_default) {
+    MyPage<int> p;
+
+    // default init. maxchunk=1, pagesize=1024
+    int rv = p.init();
+    ASSERT_EQ(rv,0);
+
+    ASSERT_EQ(p.ndatum,0);
+    ASSERT_EQ(p.nchunk,0);
+
+    int *iptr = p.vget();
+    // second call to vget() should give same pointer without vgot()
+    ASSERT_EQ(iptr,p.vget());
+    p.vgot(1);
+    ++iptr;
+    ASSERT_EQ(0,p.status());
+    ASSERT_EQ(p.ndatum,1);
+    ASSERT_EQ(p.nchunk,1);
+    ASSERT_EQ(iptr,p.vget());
+    // use too large chunk size
+    p.vgot(2);
+    ASSERT_EQ(1,p.status());
+
+    p.reset();
+    ASSERT_EQ(p.ndatum,0);
+    ASSERT_EQ(p.nchunk,0);
+
+    iptr = p.vget();
+    p.vgot(1);
+    ++iptr;
+    ASSERT_EQ(iptr,p.get());
+    ++iptr;
+    ASSERT_EQ(iptr,p.get(1));
+    ASSERT_EQ(p.ndatum,3);
+    ASSERT_EQ(p.nchunk,3);
+}
+
+TEST(MyPage, int_custom) {
+    MyPage<int> p;
+
+    // default init. maxchunk=16, pagesize=256
+    int rv = p.init(16,256);
+    ASSERT_EQ(rv,0);
+
+    ASSERT_EQ(p.ndatum,0);
+    ASSERT_EQ(p.nchunk,0);
+
+    int *iptr = p.vget();
+    // second call to vget() should give same pointer without vgot()
+    ASSERT_EQ(iptr,p.vget());
+    p.vgot(16);
+    iptr += 16;
+    ASSERT_EQ(0,p.status());
+    ASSERT_EQ(p.ndatum,16);
+    ASSERT_EQ(p.nchunk,1);
+
+    // use too large chunk size
+    ASSERT_EQ(iptr,p.vget());
+    p.vgot(32);
+    ASSERT_EQ(1,p.status());
+
+    p.reset();
+    ASSERT_EQ(p.ndatum,0);
+    ASSERT_EQ(p.nchunk,0);
+
+    iptr = p.vget();
+    p.vgot(16);
+    iptr = p.vget();
+    p.vgot(4);
+    iptr += 4;
+    ASSERT_EQ(iptr,p.get());
+    ++iptr;
+    ASSERT_EQ(iptr,p.get(16));
+    ASSERT_EQ(p.ndatum,37);
+    ASSERT_EQ(p.nchunk,4);
+}