"Added a build target to copy dll files to the test directory

This is a work-around to prevent test execution to fail due to not finding the DLLs. This affects only Windows builds and is work-in-progress as the directory locations for the binaries may be adjusted in the future.
Signed-off-by: Otavio Rodolfo Piske <opiske@redhat.com>

test/CMakeLists.txt

+PROJECT(mqtt-tests)
+
 SET(MQTT_TEST_BROKER "tcp://localhost:1883" CACHE STRING "Hostname of a test MQTT broker to use")
 SET(MQTT_SSL_HOSTNAME "localhost" CACHE STRING "Hostname of a test SSL MQTT broker to use")
 
+
 ADD_EXECUTABLE(
 	test1
 	test1.c
@@ -11,6 +14,14 @@ TARGET_LINK_LIBRARIES(
 	paho-mqtt3c
 )
 
+IF (WIN32)
+	ADD_CUSTOM_COMMAND(
+		TARGET test1 PRE_BUILD 
+		COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_SOURCE_DIR}/test/dll-copy.cmake
+		COMMENT "Copying DLLs to test directory"
+	)
+ENDIF()
+
 ADD_TEST(
 	NAME test1
 	COMMAND "test1" "--connection" ${MQTT_TEST_BROKER}

test/dll-copy.cmake

+FILE(GLOB dlls ${CMAKE_BINARY_DIR}/src/*.dll)
+FOREACH(dll ${dlls}) 
+	MESSAGE(STATUS, "Copying dll runtime file ${CMAKE_BINARY_DIR}/src/${dll} to runtime dir ${CMAKE_BINARY_DIR}/test")
+	FILE(COPY ${dlls} DESTINATION  ${CMAKE_BINARY_DIR}/test)
+ENDFOREACH(dll)
\ No newline at end of file