add unit test framework for pair, bond, angle styles from progguide branch

unittest/force-styles/test_main.cpp

@@ -0,0 +1,89 @@
+/* ----------------------------------------------------------------------
+   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 "test_main.h"
+#include "test_config.h"
+#include "gtest/gtest.h"
+
+#include <mpi.h>
+#include <cstring>
+#include <iostream>
+
+// need to be defined in unit test body
+extern bool read_yaml_file(const char *, TestConfig &);
+extern void generate_yaml_file(const char *, const TestConfig &);
+
+void usage(std::ostream &out, const char *name)
+{
+    out << "usage: " << name << " <testfile.yaml> [OPTIONS]\n\n"
+        << "Available options:\n"
+        << "  -g <newfile.yaml>   regenerate yaml file under a new name\n"
+        << "  -u                  update the original yaml file\n"
+        << "  -v                  run tests with verbose output\n"
+        << "  -s                  run tests with error statistics output\n"
+        << "  -h                  print this message\n"
+        << std::endl;
+}
+    
+// test configuration settings read from yaml file
+TestConfig test_config;
+
+// whether to print error statistics
+bool print_stats = false;
+
+// whether to print verbose output (i.e. not capturing LAMMPS screen output).
+bool verbose = false;
+
+int main(int argc, char **argv)
+{
+    MPI_Init(&argc, &argv);
+    ::testing::InitGoogleTest(&argc, argv);
+
+    if (argc < 2) {
+        usage(std::cerr, argv[0]);
+        return 1;
+    }
+
+    if (!read_yaml_file(argv[1], test_config)) {
+        std::cerr << "Error parsing yaml file: " << argv[1] << std::endl;
+        return 2;
+    }
+
+    int iarg=2;
+    while (iarg < argc) {
+
+        if (strcmp(argv[iarg],"-g") == 0) {
+            if (iarg+1 < argc) {
+                generate_yaml_file(argv[iarg+1], test_config);
+                return 0;
+            } else {
+                usage(std::cerr,argv[0]);
+                return 1;
+            }
+        } else if (strcmp(argv[iarg],"-u") == 0) {
+            generate_yaml_file(argv[1], test_config);
+            return 0;
+        } else if (strcmp(argv[iarg],"-s") == 0) {
+            print_stats = true;
+            ++iarg;
+        } else if (strcmp(argv[iarg],"-v") == 0) {
+            verbose = true;
+            ++iarg;
+        } else {
+            std::cerr << "unknown option: " << argv[iarg] << "\n\n";
+            usage(std::cerr, argv[0]);
+            return 1;
+        }
+    }
+    return RUN_ALL_TESTS();
+}