github: replace call for sleep with wait-for-it.sh

Previously integration tests invoked `sleep 10` to "give time to settle"
the environment. In a fast container, waiting for so long is not needed
and in a slow one it might not be enough.

This commit changes this line to use `./util/wait-for-it.sh` instead [1]
to check robustly that the port is being listened to.

Fixes #49.

[1] https://github.com/vishnubob/wait-for-it

Signed-off-by: Mikhail Koviazin <[email protected]>

Author: Mikhail Koviazin

.github/workflows/integration.yaml

@@ -79,7 +79,11 @@ jobs:
             pip install "libvalkey>=4.0.0"
            fi
            invoke devenv
-           sleep 10 # time to settle
+           if [[ "${{matrix.test-type}}" == "standalone" ]]; then
+            ./util/wait-for-it.sh localhost:6379
+           else
+            ./util/wait-for-it.sh localhost:16379
+           fi
            invoke ${{matrix.test-type}}-tests --protocol=${{ matrix.protocol-version }}
            if [[ "${{matrix.python-version}}" != pypy-* ]]; then
             invoke ${{matrix.test-type}}-tests --uvloop --protocol=${{ matrix.protocol-version }}