Add integration tests

Setup integration test matrix in CircleCI. * Update README integration testing list. Signed-off-by: Ben Kochie <superq@gmail.com>

Author: SuperQ

.circleci/config.yml

@@ -20,6 +20,30 @@ jobs:
  - prometheus/store_artifact:
  file: postgres_exporter
 
+ integration:
+ docker:
+ - image: circleci/golang:1.15
+ - image: << parameters.postgres_image >>
+ environment:
+ POSTGRES_DB: circle_test
+ POSTGRES_USER: postgres
+ POSTGRES_PASSWORD: test
+
+ parameters:
+ postgres_image:
+ type: string
+
+ environment:
+ DATA_SOURCE_NAME: 'postgresql://postgres:test@localhost:5432/circle_test?sslmode=disable'
+ GOOPTS: '-v -tags integration'
+
+ steps:
+ - checkout
+ - setup_remote_docker
+ - run: docker version
+ - run: make build
+ - run: make test
+
 workflows:
  version: 2
  postgres_exporter:
@@ -28,6 +52,17 @@ workflows:
  filters:
  tags:
  only: /.*/
+ - integration:
+ matrix:
+ parameters:
+ postgres_image:
+ - circleci/postgres:9.4
+ - circleci/postgres:9.5
+ - circleci/postgres:9.6
+ - circleci/postgres:10
+ - circleci/postgres:11
+ - circleci/postgres:12
+ - circleci/postgres:13
  - prometheus/build:
  name: build
  filters:

README.md

@@ -7,7 +7,7 @@
 
 Prometheus exporter for PostgreSQL server metrics.
 
-CI Tested PostgreSQL versions: `9.4`, `9.5`, `9.6`, `10`, `11`
+CI Tested PostgreSQL versions: `9.4`, `9.5`, `9.6`, `10`, `11`, `12`, `13`
 
 ## Quick Start
 This package is available for Docker: