fix(plugin): miscellaneous

[DanielHabenicht]

• Add ability to use this plugin multiple times in one config IMPROVE: Add ability to push multiple docker images #4

• Add new Option to NOT push the version tag IMPROVE: Add new Option to NOT push the version tag #5

• Add some more test cases

• Add Check in verifyConditions to check if image exists on machine

closes: #4 #5

[DanielHabenicht]

@cmurczek as Docker is a requirement for running tests now, you may have to switch to the Azure DevOps Hosted Ubuntu Agents as they are the only ones that have Docker installed.

[DanielHabenicht]

• Publish step is returning an Array instead of an Object

The publish plugins must return an Object.

The publish function of the semantic-release-docker-test returned [ { completeImageName: [ 'danielhabenicht/phonebook:1.0.3', 'danielhabenicht/phonebook:latest' ] }, { completeImageName: [ 'danielhabenicht/builder:1.0.3', 'danielhabenicht/builder:latest' ] } ] instead.

We recommend to report the issue to the semantic-release-docker-test authors, providing the following informations:

    * The semantic-release version: 15.12.3
    * The semantic-release logs from your CI job
    * The value returned by the plugin: [ { completeImageName: [ 'danielhabenicht/phonebook:1.0.3', 'danielhabenicht/phonebook:latest' ] }, { completeImageName: [ 'danielhabenicht/builder:1.0.3', 'danielhabenicht/builder:latest' ] } ]    * A link to the semantic-release plugin developer guide: https://github.com/semantic-release/semantic-release/blob/master/docs/developer-guide/plugin.md

[cmurczek-it]

@DanielHabenicht thanks for the effort! A couple of things though to consider when submitting a PR:

• instead of one PR for all changes create multiple smaller PRs. This allows for accepting those parts that are ready and continuing work on other, resp. rejecting changes that are no longer needed or unwanted
• follow the commit message format described by conventional changelog/angular convention to allow semantic release doing its work properly (breaking changes - > bump the first part, feat -> bumps the second part, fix, perf -> bumps the third part of the versionnumber)

Please refactor this PR so I can accept the individual parts without your changes regarding available docker images for testing. I already solved that by stubbing the dependency during tests altogether.

[DanielHabenicht]

Hi, thanks for maintaining this repo.
I have refactored the code so you can easily bump the version number according to the issues.

I will however not refactor the tests.
The problem there was simply, that the AzureDevOps Pipeline Agents are slower than my local machine thus running into the specified timeout.
The tests are written as End-2-End tests in order to test the plugin and its interactions with the docker engine. Just testing the output of the Plugin would be, in my mind, to narrow.
They do not need any preconfigured or downloaded docker images, as they are building and deleting there own.

Closing in favor for #7 and #8.