Add simple postgres-basics test

test/config.sh

@@ -76,6 +76,7 @@ declare -A imageTests=(
 		php-fpm-hello-web
 	'
 	[postgres]='
+		postgres-basics
 	'
 	[python]='
 		python-hy

test/tests/postgres-basics/run.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+set -e
+
+image="$1"
+
+export POSTGRES_USER='my cool postgres user'
+export POSTGRES_PASSWORD='my cool postgres password'
+export POSTGRES_DB='my cool postgres database'
+
+cname="postgres-container-$RANDOM-$RANDOM"
+cid="$(docker run -d -e POSTGRES_USER -e POSTGRES_PASSWORD -e POSTGRES_DB --name "$cname" "$image")"
+trap "docker rm -f $cid > /dev/null" EXIT
+
+psql() {
+	docker run --rm -i \
+		--link "$cname":postgres \
+		--entrypoint psql \
+		-e PGPASSWORD="$POSTGRES_PASSWORD" \
+		"$image" \
+		--host postgres \
+		--username "$POSTGRES_USER" \
+		--dbname "$POSTGRES_DB" \
+		--quiet --no-align --tuples-only \
+		"$@"
+}
+
+tries=10
+while ! echo 'SELECT 1' | psql &> /dev/null; do
+	(( tries-- ))
+	if [ $tries -le 0 ]; then
+		echo >&2 'postgres failed to accept connetions in a reasonable amount of time!'
+		echo 'SELECT 1' | psql # to hopefully get a useful error message
+		false
+	fi
+	sleep 2
+done
+
+echo 'CREATE TABLE test (a INT, b INT, c VARCHAR(255))' | psql
+[ "$(echo 'SELECT COUNT(*) FROM test' | psql)" = 0 ]
+psql <<'EOSQL'
+	INSERT INTO test VALUES (1, 2, 'hello')
+EOSQL
+[ "$(echo 'SELECT COUNT(*) FROM test' | psql)" = 1 ]
+psql <<'EOSQL'
+	INSERT INTO test VALUES (2, 3, 'goodbye!')
+EOSQL
+[ "$(echo 'SELECT COUNT(*) FROM test' | psql)" = 2 ]
+echo 'DELETE FROM test WHERE a = 1' | psql
+[ "$(echo 'SELECT COUNT(*) FROM test' | psql)" = 1 ]
+[ "$(echo 'SELECT c FROM test' | psql)" = "goodbye!" ]
+echo 'DROP TABLE test' | psql