Work for test refactoring.

There are a few major areas in this change.

* CMake options are now located in a common cmake/NNGOptions.cmake
  file.  This should make it easier for folks to figure out what
  the options are, and how they are used.

* Tests are now scoped with their directory name, which should
  avoid possible name collisions with test names.

* A number of tests have been either moved or incorporated into
  the newer testutil/acutest framework.  We are moving away from
  my old c-convey framework to something easier to debug.

* We use CMake directories a bit more extensively leading to a much
  cleaner CMake structure.  It's not complete, but a big step in the
  right direction, and a preview of future work.

* Tests are now run with verbose flags, so we get more test results
  in the CI/CD logs.

1 files changed, 46 insertions, 0 deletions

diff --git a/src/core/errors_test.c b/src/core/errors_test.c
new file mode 100644
index 00000000..4e50467c
--- /dev/null
+++ b/src/core/errors_test.c
@@ -0,0 +1,46 @@
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#include <errno.h>
+#include <string.h>
+
+#include <nng/nng.h>
+
+#include <acutest.h>
+#include <testutil.h>
+
+static void
+test_known_errors(void)
+{
+
+	TEST_STREQUAL(nng_strerror(NNG_ECLOSED), "Object closed");
+	TEST_STREQUAL(nng_strerror(NNG_ETIMEDOUT), "Timed out");
+}
+
+static void
+test_unknown_errors(void)
+{
+	for (unsigned i = 1; i < 0x1000000; i = i * 2 + 100) {
+		TEST_CHECK(nng_strerror(i) != NULL);
+	}
+}
+
+static void
+test_system_errors(void)
+{
+	TEST_STREQUAL(nng_strerror(NNG_ESYSERR + ENOENT), strerror(ENOENT));
+	TEST_STREQUAL(nng_strerror(NNG_ESYSERR + EINVAL), strerror(EINVAL));
+}
+
+TEST_LIST = {
+	{ "known errors", test_known_errors },
+	{ "unknown errors", test_unknown_errors },
+	{ "system errors", test_system_errors },
+	{ NULL, NULL },
+};