Add unit test suites with initial successful dummy test (#781978)

Now 'make check' will additionally build and run the test suites in the
./tests directory.  Add initial always successful dummy test suite.
This is done using Automake support for testing.

    Automake Manual, 15 Support for test suites
    https://www.gnu.org/software/automake/manual/automake.html#Tests

./tests/Makefile.am takes some influence from the same file in the
minimal-gtest-autotools template project.
    654848ec01/tests/Makefile.am

Bug 781978 - Add Google Test C++ test framework

.gitignore

@@ -43,5 +43,10 @@ missing
 mkinstalldirs
 omf.make
 stamp-*
+test-driver
 testbuild.log
+tests/*.log
+tests/*.trs
+tests/test-suite.log
+tests/test_dummy
 xmldocs.make

Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = compose data doc include lib po src
+SUBDIRS = compose data doc include lib po src tests
 # Only build GParted help documentation when enabled.  (Can be disabled
 # with './configure --disable-doc').
 if BUILD_HELP_DOC

configure.ac

@@ -383,6 +383,7 @@ lib/Makefile
 lib/gtest/Makefile
 src/Makefile
 po/Makefile.in
+tests/Makefile
 ])
 
 AC_OUTPUT

tests/Makefile.am

@@ -0,0 +1,19 @@
+AM_CPPFLAGS =  \
+	-I$(top_srcdir)/include            \
+	-I$(top_srcdir)/lib/gtest/include  \
+	$(GTEST_CPPFLAGS)
+AM_CXXFLAGS = -Wall $(GTEST_CXXFLAGS)
+AM_LDFLAGS = $(GTEST_LDFLAGS)
+LDADD =  \
+	$(GTEST_LIBS)                                 \
+	$(top_srcdir)/lib/gtest/lib/libgtest_main.la  \
+	$(top_srcdir)/lib/gtest/lib/libgtest.la
+
+# Programs to be built by "make check"
+check_PROGRAMS =  \
+	test_dummy
+
+# Test cases to be run by "make check"
+TESTS = $(check_PROGRAMS)
+
+test_dummy_SOURCES = test_dummy.cc

tests/test_dummy.cc

@@ -0,0 +1,14 @@
+/* Copyright (C) 2017 Mike Fleetwood
+ *
+ *  Copying and distribution of this file, with or without modification,
+ *  are permitted in any medium without royalty provided the copyright
+ *  notice and this notice are preserved.  This file is offered as-is,
+ *  without any warranty.
+ */
+
+#include "gtest/gtest.h"
+
+TEST( DummyTest, Success )
+{
+	EXPECT_TRUE( true );
+}