Added tests to .gitlab-ci.yml

stages:

  - build

  - test

  - deploy

variables:

  TEST_IMAGE: $CI_REGISTRY/$CI_PROJECT_NAMESPACE/$CI_PROJECT_NAME/$CI_COMMIT_REF_NAME:test

  DEPLOY_IMAGE: $CI_REGISTRY/$CI_PROJECT_NAMESPACE/$CI_PROJECT_NAME/$CI_COMMIT_REF_NAME

  TEST_IMAGE: ${CI_REGISTRY}/${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}/${CI_COMMIT_REF_NAME}:test

  DEPLOY_IMAGE: ${CI_REGISTRY}/${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}/${CI_COMMIT_REF_NAME}

build:

  stage: build

  script:

    - docker build -f Dockerfile -t $TEST_IMAGE --build-arg CI_REGISTRY=$CI_REGISTRY --no-cache=true .

    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

    - docker push $TEST_IMAGE

    - docker build -f Dockerfile -t ${TEST_IMAGE} --build-arg CI_REGISTRY=${CI_REGISTRY} --no-cache=true .

    - docker login -u gitlab-ci-token -p ${CI_JOB_TOKEN} ${CI_REGISTRY}

    - docker push ${TEST_IMAGE}

test_os:

  stage: test

  script:

    - docker run --rm ${TEST_IMAGE} bash -c "apt-get update && apt-get -y upgrade"

test_java:

  stage: test

  script:

    - docker run --rm ${TEST_IMAGE} bash -c "java -version"

deploy:

  stage: deploy

  script:

    - docker pull $TEST_IMAGE

    - docker tag $TEST_IMAGE $DEPLOY_IMAGE:latest

    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

    - docker push $DEPLOY_IMAGE:latest

    - docker tag $TEST_IMAGE $DEPLOY_IMAGE:$(date +%Y%m%d)

    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

    - docker push $DEPLOY_IMAGE:$(date +%Y%m%d)

    - docker pull ${TEST_IMAGE}

    - docker tag ${TEST_IMAGE} ${DEPLOY_IMAGE}:latest

    - docker login -u gitlab-ci-token -p ${CI_JOB_TOKEN} ${CI_REGISTRY}

    - docker push ${DEPLOY_IMAGE}:latest

    - docker tag ${TEST_IMAGE} ${DEPLOY_IMAGE}:$(date +%Y%m%d)

    - docker login -u gitlab-ci-token -p ${CI_JOB_TOKEN} ${CI_REGISTRY}

    - docker push ${DEPLOY_IMAGE}:$(date +%Y%m%d)

  only:

    - master