Tests: Add FindBZip2 unit tests

Tests/CMakeLists.txt

@@ -1356,6 +1356,10 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
     add_subdirectory(FindBoost)
   endif()
 
+  if(CMake_TEST_FindBZip2)
+    add_subdirectory(FindBZip2)
+  endif()
+
   if(CMake_TEST_FindGSL)
     add_subdirectory(FindGSL)
   endif()

Tests/FindBZip2/CMakeLists.txt

@@ -0,0 +1,10 @@
+add_test(NAME FindBZip2.Test COMMAND
+  ${CMAKE_CTEST_COMMAND} -C $<CONFIGURATION>
+  --build-and-test
+  "${CMake_SOURCE_DIR}/Tests/FindBZip2/Test"
+  "${CMake_BINARY_DIR}/Tests/FindBZip2/Test"
+  ${build_generator_args}
+  --build-project TestFindBZip2
+  --build-options ${build_options}
+  --test-command ${CMAKE_CTEST_COMMAND} -V -C $<CONFIGURATION>
+  )

Tests/FindBZip2/Test/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.4)
+project(TestFindBZip2 C)
+include(CTest)
+
+find_package(BZip2 REQUIRED)
+
+add_definitions(-DCMAKE_EXPECTED_BZip2_VERSION="${BZip2_VERSION_STRING}")
+
+add_executable(test_tgt main.c)
+target_link_libraries(test_tgt BZip2::BZip2)
+add_test(NAME test_tgt COMMAND test_tgt)
+
+add_executable(test_var main.c)
+target_include_directories(test_var PRIVATE ${BZIP2_INCLUDE_DIRS})
+target_link_libraries(test_var PRIVATE ${BZIP2_LIBRARIES})
+add_test(NAME test_var COMMAND test_var)

Tests/FindBZip2/Test/main.c

@@ -0,0 +1,23 @@
+#include <bzlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{
+  int chunksize = 1024;
+  FILE* file = fopen("test.bzip2", "wb");
+  char* buf = malloc(sizeof(char) * chunksize);
+  int error, rsize;
+  unsigned int in, out;
+  BZFILE* bzfile = BZ2_bzWriteOpen(&error, file, 64, 1, 10);
+
+  /* Don't actually write anything for the purposes of the test */
+
+  BZ2_bzWriteClose(&error, bzfile, 1, &in, &out);
+  free(buf);
+  fclose(file);
+
+  remove("test.bzip2");
+
+  return 0;
+}