Test MySQL connection.

Author: arvenil

.travis.yml

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+language: go
+
+go:
+  - 1.10.x
+
+env:
+  matrix:
+    - MYSQL_IMAGE=mysql:5.5
+    - MYSQL_IMAGE=mysql:5.6
+    - MYSQL_IMAGE=mysql:5.7
+    - MYSQL_IMAGE=mysql:8.0
+    - MYSQL_IMAGE=percona/percona-server:5.6
+    - MYSQL_IMAGE=percona/percona-server:5.7
+    - MYSQL_IMAGE=percona:5.5
+    - MYSQL_IMAGE=percona:5.6
+    - MYSQL_IMAGE=percona:5.7
+    - MYSQL_IMAGE=mariadb:5.5
+    - MYSQL_IMAGE=mariadb:10.0
+    - MYSQL_IMAGE=mariadb:10.1
+    - MYSQL_IMAGE=mariadb:10.2
+    - MYSQL_IMAGE=mariadb:10.3
+
+services:
+  - docker
+
+install:
+  # ensure that vendor/ is in sync with code and Gopkg.*
+  - curl https://github.com/golang/dep/releases/download/v0.4.1/dep-linux-amd64 -L -o ~/dep && chmod +x ~/dep
+  - rm -fr vendor/
+  - ~/dep ensure -v
+  - git diff --exit-code
+
+before_script:
+  - docker --version
+  - docker-compose --version
+  - docker-compose up -d
+  - ./with_backoff.sh docker-compose exec mysql mysql -uroot -e 'SELECT 1'
+
+script:
+  - go run main.go
+
+notifications:
+  email: false

Gopkg.lock

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+[prune]
+  go-tests = true
+  non-go = true
+  unused-packages = true
+
+[[constraint]]
+  name = "github.com/go-sql-driver/mysql"
+  branch = "master"

Gopkg.toml

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+---
+version: '3'
+services:
+  mysql:
+    image: ${MYSQL_IMAGE:-mysql:5.5}
+    ports:
+      - 127.0.0.1:3306:3306
+    environment:
+      - MYSQL_ALLOW_EMPTY_PASSWORD=yes

docker-compose.yml

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+package main
+
+import (
+	"database/sql"
+	"fmt"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+func main() {
+	dsn := "root@/"
+	db, err := sql.Open("mysql", dsn)
+	if err != nil {
+		panic(err)
+	}
+	defer db.Close()
+
+	if err = db.Ping(); err != nil {
+		panic(err)
+	}
+	fmt.Println("Connection works.")
+}