use Google C++ Testing Framework for libapt tests

My commit 45df0ad2 from 26. Nov 2009 had a little remark:
"The commit also includes a very very simple testapp."
This was never intended to be permanent, but as usually…

The commit adds the needed make magic to compile gtest statically
as it is required and links it against a small runner. All previous
testcase binaries are reimplemented in gtest and combined in this
runner. While most code is a 1:1 translation some had to be rewritten
like compareversion_test.cc, but the coverage remains the same.

1 files changed, 19 insertions, 0 deletions

diff --git a/test/libapt/gtest_runner.cc b/test/libapt/gtest_runner.cc
new file mode 100644
index 000000000..5823c55de
--- /dev/null
+++ b/test/libapt/gtest_runner.cc
@@ -0,0 +1,19 @@
+#include <gtest/gtest.h>
+#include <apt-pkg/error.h>
+int main(int argc, char **argv) {
+   ::testing::InitGoogleTest(&argc, argv);
+   int result = RUN_ALL_TESTS();
+   if (_error->empty() == false)
+   {
+      std::cerr << "The test generated the following global messages:" << std::endl;
+      _error->DumpErrors(std::cerr);
+      // messages on the stack can't be right, error out
+      // even if we have no idea where this message came from
+      if (result == 0)
+      {
+	 std::cerr << "All tests successful, but messages were generated, so still a failure!" << std::endl;
+	 return 29;
+      }
+   }
+   return result;
+}