Arrange 3 tests.

test/modules/dav/test_004_lock_timeout_overflow.py

@@ -1,3 +1,4 @@
+import glob
 import os
 import re
 
@@ -32,6 +33,11 @@ def _class_scope(self, env):
             with open(os.path.join(dav_dir, name), 'w') as fd:
                 fd.write('hello\n')
 
+        # the locks outlive the server: file1.txt stays locked for 2^32-1
+        # seconds, so a lock database left by an earlier run answers 423
+        for f in glob.glob(f"{env.gen_dir}/davlock-timeout-overflow*"):
+            os.remove(f)
+
         conf = HttpdConf(env, extras={
             'base': f"""
         DavLockDB "{env.gen_dir}/davlock-timeout-overflow"

test/modules/http3/env.py

@@ -76,6 +76,18 @@ def __init__(self, pytestconfig=None):
     def setup_httpd(self, setup: HttpdTestSetup = None):
         super().setup_httpd(setup=H3TestSetup(env=self))
 
+    @property
+    def h3_ossl_backend(self) -> bool:
+        """Whether mod_http3 runs on OpenSSL's own QUIC stack
+        (--with-http3-quic=openssl) and not on ngtcp2, which has no 0-RTT,
+        connection ID routing or connection migration."""
+        path = os.path.join(self.LIBEXEC_DIR, "mod_http3.so")
+        try:
+            with open(path, "rb") as fd:
+                return b"ngtcp2" not in fd.read()
+        except OSError:
+            return False
+
     @property
     def h3_port(self) -> int:
         # the QUIC listener shares the number of the TLS port, over UDP

test/modules/http3/test_016_cid_routing.py

@@ -101,6 +101,8 @@ class TestCidRouting:
 
     @pytest.fixture(autouse=True, scope="class")
     def _class_scope(self, env):
+        if env.h3_ossl_backend:
+            pytest.skip("routing by connection ID needs the ngtcp2 backend")
         cpus = os.cpu_count() or 1
         if cpus < 2:
             pytest.skip("two buckets need two cores")

test/modules/metadata/test_004_remoteip.py

@@ -279,6 +279,9 @@ def remote_port_install(self, env):
                   f"RemoteIPInternalProxy {self.PEER}"] + exposed)
         conf.end_vhost()
         conf.install()
+        # drop what an earlier test logged, so that remote_port_clear_log()
+        # waits for the probe of this restart and not for a stale line
+        open(os.path.join(env.server_logs_dir, self.LOG_FILE), 'w').close()
         assert env.apache_restart() == 0
 
     def remote_port_logged(self, env):
@@ -293,7 +296,15 @@ def remote_port_logged(self, env):
         return lines[0]
 
     def remote_port_clear_log(self, env):
-        open(os.path.join(env.server_logs_dir, self.LOG_FILE), 'w').close()
+        # The readiness probe of apache_restart() is logged after its
+        # response is sent, so it can land after the restart returned:
+        # wait for that line, or it would be taken for the test's own.
+        log_path = os.path.join(env.server_logs_dir, self.LOG_FILE)
+        for _ in range(20):
+            if os.path.getsize(log_path) > 0:
+                break
+            time.sleep(0.1)
+        open(log_path, 'w').close()
 
     # PROXY protocol: the client's port is known (4321 in PP2_ADDRS) and
     # every place must report it, not the proxy's TCP source port.