t/: Make it possibly to easily run unit and integration tests separat…

…ely.

README

@@ -113,7 +113,11 @@ Testing
 -------
 
   Unit and integration tests for SysDB are shipped along with the source code
-  in the ‘t’ subdirectory. Run ‘make test’ to run all available tests.
+  in the ‘t’ subdirectory. Run ‘make test’ to run all available tests or use
+  the following commands to run unit and integration tests separately:
+
+    make test TESTS='$(UNIT_TESTS)'
+    make test TESTS='$(INTEGRATION_TESTS)'
 
   Some tests require the ‘fopencookie’ function as provided by the GNU libc
   library. It used used to mock I/O related functions. In case this function

t/Makefile.am

@@ -132,13 +132,15 @@ endif
 #
 
 if INTEGRATION_TESTING
-TESTS += \
+INTEGRATION_TESTS = \
 		integration/config.sh \
 		integration/ssl.sh \
 		integration/query.sh \
 		integration/matching.sh \
 		integration/filter.sh
 
+TESTS += $(INTEGRATION_TESTS)
+
 check_LTLIBRARIES += integration/mock_plugin.la
 integration_mock_plugin_la_SOURCES = integration/mock_plugin.c
 # -rpath is a work-around to enforce a shared library