test: pipeline_free

Added tests for pipeline free and underlining static functions.
Also refactored previously added tests to incorporate code reuse.

Signed-off-by: Jakub Dabek <jakub.dabek@linux.intel.com>

Author: Jakub Dabek

test/cmocka/Makefile.am

@@ -73,7 +73,10 @@ check_PROGRAMS += pipeline_new_allocation
 pipeline_new_allocation_SOURCES = $(pipeline_cpu_c) ../../src/audio/pipeline.c  src/audio/pipeline/pipeline_new_allocation.c src/audio/pipeline/pipeline_mocks.c src/audio/pipeline/pipeline_new_allocation_mocks.c
 
 check_PROGRAMS += pipeline_connect_upstream
-pipeline_connect_upstream_SOURCES = $(pipeline_cpu_c) ../../src/audio/pipeline.c src/audio/pipeline/pipeline_mocks.c src/audio/pipeline/pipeline_connect_upstream.c src/audio/pipeline/pipeline_mocks_rzalloc.c
+pipeline_connect_upstream_SOURCES = $(pipeline_cpu_c) ../../src/audio/pipeline.c src/audio/pipeline/pipeline_mocks.c src/audio/pipeline/pipeline_connect_upstream.c src/audio/pipeline/pipeline_mocks_rzalloc.c src/audio/pipeline/pipeline_connection_mocks.c
+
+check_PROGRAMS += pipeline_free
+pipeline_free_SOURCES = $(pipeline_cpu_c) ../../src/audio/pipeline.c src/audio/pipeline/pipeline_mocks.c src/audio/pipeline/pipeline_free.c src/audio/pipeline/pipeline_mocks_rzalloc.c src/audio/pipeline/pipeline_connection_mocks.c
 
 endif