add test for the version report fascilities

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/integration/test_version.py b/tests/integration/test_version.py
new file mode 100644
index 0000000..66f570d
--- /dev/null
+++ b/tests/integration/test_version.py
@@ -0,0 +1,36 @@
+"""The -v report, which is where a build says what went into it.
+
+Driving the binary is the only way to see this: the feature list is a table
+of #ifdefs, so it is only true for the flags the binary itself was built with.
+"""
+
+import subprocess
+import unittest
+
+from harness import TRACKER
+
+
+class VersionFlag(unittest.TestCase):
+    def report(self):
+        # -v writes to stderr and exits before it binds anything
+        done = subprocess.run([TRACKER, "-v"], capture_output=True, timeout=30)
+        self.assertEqual(done.returncode, 0, done.stderr)
+        return done.stderr.decode()
+
+    def test_first_line_names_the_release(self):
+        # The commit in brackets is there in a checkout and in a release
+        # tarball, and absent in a build that had neither to ask.
+        first = self.report().splitlines()[0]
+        self.assertRegex(first, r"^opentracker \d+\.\d+\.\d+( \(\S+\))?$")
+
+    def test_names_the_event_mechanism(self):
+        self.assertRegex(self.report(), r"(?m)^events: (epoll|kqueue|poll)$")
+
+    def test_lists_the_features_this_build_has(self):
+        # The Makefile builds this binary with these and not with those, so a
+        # feature table that stops following the build fails here.
+        report = self.report()
+        for want in ("WANT_KEEPALIVE", "WANT_ACCESSLIST_BLACK", "WANT_DYNAMIC_ACCESSLIST"):
+            self.assertIn(want, report)
+        for unwanted in ("WANT_SPOT_WOODPECKER", "WANT_V4_ONLY", "WANT_RESTRICT_STATS"):
+            self.assertNotIn(unwanted, report)