Add dockerised tests

docker/test_db/Dockerfile

@@ -0,0 +1,3 @@
+FROM postgres:11
+COPY setup.sql /docker-entrypoint-initdb.d/
+COPY is_ready /

docker/test_db/is_ready

@@ -0,0 +1,3 @@
+#!/bin/bash
+/usr/lib/postgresql/9.6/bin/psql -U postgres -c "SELECT 1 FROM public.container_ready" postgres
+

docker/test_db/setup.sql

@@ -0,0 +1,26 @@
+CREATE DATABASE  test;
+\c test
+CREATE ROLE test login password 'test';
+CREATE UNLOGGED TABLE source (                     
+	id bigserial primary key,
+	test_int integer,
+	test_text text,
+	test_ts timestamp with time zone
+);
+CREATE UNLOGGED TABLE dest (                     
+	id bigint primary key,
+	test_int integer,
+	test_text text,
+	test_ts timestamp with time zone
+);
+
+
+GRANT SELECT ON source to test;
+GRANT SELECT,INSERT,UPDATE,DELETE ON dest TO test;
+
+INSERT INTO source(test_int,test_text,test_ts) SELECT 1,'banana',now() FROM generate_series(1,100000);
+
+\c postgres
+CREATE TABLE public.container_ready AS SELECT 1 FROM(VALUES(1)) AS a(a);
+GRANT SELECT ON public.container_ready TO TEST;
+