Add Dockerfile and docker-compose.yml to easily run tests on all data…

…bases

Dockerfile

@@ -0,0 +1,6 @@
+FROM golang:1.12.4
+
+WORKDIR /gormigrate
+COPY . .
+
+RUN go mod download

README.md

@@ -183,6 +183,14 @@ go test -tags sqlserver
 go test -tags 'sqlite postgresql mysql'
 ```
 
+Or altenatively, you could use Docker to easily run tests on all databases
+at once. To do that, make sure Docker is installed and running in your machine
+and then run:
+
+```bash
+task docker
+```
+
 [gorm]: http://gorm.io/
 [gormmigrate]: http://doc.gorm.io/database.html#migration
 [gormdatabases]: http://doc.gorm.io/database.html#connecting-to-a-database

Taskfile.yml

@@ -44,3 +44,17 @@ tasks:
   test:
     cmds:
       - go test -v -tags {{.DATABASE}}
+
+  docker:
+    cmds:
+      - task: docker:build
+      - task: docker:test
+
+  docker:build:
+    cmds:
+      - docker build -t gormigrate .
+
+  docker:test:
+    cmds:
+      - docker-compose down -v
+      - docker-compose run gormigrate go test -v -tags 'postgresql sqlite mysql sqlserver'

docker-compose.yml

@@ -0,0 +1,35 @@
+version: '3'
+
+services:
+  gormigrate:
+    image: gormigrate
+    depends_on:
+      - postgresql
+      - mysql
+      - sqlserver
+    environment:
+      PGPASSWORD: postgres
+      PG_CONN_STRING: host=postgresql user=postgres dbname=gormigrate_test port=5432 sslmode=disable
+
+      MYSQL_CONN_STRING: root:mysql@tcp(mysql)/gormigrate_test?multiStatements=true
+
+      SQLSERVER_CONN_STRING: server=sqlserver;database=master;user id=sa;password=SQL@1server;encrypt=disable
+
+  postgresql:
+    image: postgres:11.2
+    environment:
+      POSTGRES_DB: gormigrate_test
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+
+  mysql:
+    image: mysql:5.7
+    environment:
+      MYSQL_DATABASE: gormigrate_test
+      MYSQL_ROOT_PASSWORD: mysql
+
+  sqlserver:
+    image: mcr.microsoft.com/mssql/server:2017-latest-ubuntu
+    environment:
+      ACCEPT_EULA: 'Y'
+      SA_PASSWORD: SQL@1server