Add test environment

tests/CMakeLists.txt

@@ -24,6 +24,22 @@ FetchContent_Declare(
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 FetchContent_MakeAvailable(googletest)
 
+# Get LAMMPS
+if (TEST_IN_GITHUB_ACTIONS)
+  # lammps was previously downloaded and built as part of the workflow
+  set (LAMMPS_SOURCE_DIR "${CMAKE_SOURCE_DIR}/../../lammps/src/")
+else()
+  message(STATUS "Downloading LAMMPS")
+  # download lammps
+  FetchContent_Declare(
+    lammps
+    URL https://github.com/lammps/lammps/archive/refs/tags/stable_23Jun2022_update4.zip
+  )
+  FetchContent_Populate(lammps)
+  set (LAMMPS_SOURCE_DIR "${lammps_SOURCE_DIR}/src/")
+endif()
+
+
 #Enable testing in CMake
 enable_testing()
 
@@ -33,6 +49,9 @@ add_executable(
     testoctp.cpp
 )
 
+# Add a preprocessor definition with the path to LAMMPS
+add_compile_definitions(LAMMPS_PATH=${LAMMPS_SOURCE_DIR})
+
 # link the googletest library to the tests
 target_link_libraries(
     testoctp
@@ -45,18 +64,7 @@ include(GoogleTest)
 gtest_discover_tests(testoctp)
 
 
-if (TEST_IN_GITHUB_ACTIONS)
-  # lammps was previously downloaded and built as part of the workflow
-  set (LAMMPS_SOURCE_DIR "${CMAKE_SOURCE_DIR}/../../lammps/src/")
-else()
-  message(STATUS "Downloading LAMMPS")
-  # download lammps
-  FetchContent_Declare(
-    lammps
-    URL https://github.com/lammps/lammps/archive/refs/tags/stable_23Jun2022_update4.zip
-  )
-  FetchContent_Populate(lammps)
-  set (LAMMPS_SOURCE_DIR "${lammps_SOURCE_DIR}/src/")
+if (NOT TEST_IN_GITHUB_ACTIONS)
   # copy octp files to lammps dir
   file(GLOB filesToCopy "${CMAKE_SOURCE_DIR}/../src/*")
   file(COPY ${filesToCopy} DESTINATION ${LAMMPS_SOURCE_DIR})

tests/testoctp.cpp

@@ -1,7 +1,35 @@
 #include <gtest/gtest.h>
+#include <iostream>
+
+#define XSTR(x) STR(x)
+#define STR(x) #x
+
+class OctpTest : public testing::Test
+{
+public:
+    OctpTest() {}
+};
+
+class TestEnvironment : public ::testing::Environment {
+public:
+    virtual void SetUp() { 
+        std::cout << XSTR(LAMMPS_PATH) << std::endl;
+    }
+};
 
-class OctpTest : public testing::Test {};
 
 TEST_F(OctpTest, DummyTest) {
     EXPECT_TRUE(true);
 }
+
+TEST_F(OctpTest, DummyTest2) {
+    EXPECT_TRUE(true);
+}
+
+
+int main(int argc, char* argv[]) {
+  ::testing::InitGoogleTest(&argc, argv);
+  // gtest takes ownership of the TestEnvironment ptr - we don't delete it.
+  ::testing::AddGlobalTestEnvironment(new TestEnvironment);
+  return RUN_ALL_TESTS();
+}