Add intructions for debugging

Bumps [node-fetch](https://github.com/bitinn/node-fetch) from 2.6.0 to 2.6.1. **This update includes a security fix.**
- [Release notes](https://github.com/bitinn/node-fetch/releases)
- [Changelog](https://github.com/node-fetch/node-fetch/blob/master/docs/CHANGELOG.md)
- [Commits](https://github.com/bitinn/node-fetch/compare/v2.6.0...v2.6.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

.editorconfig

@@ -11,11 +11,11 @@ tab_width = 2
 trim_trailing_whitespace = true
 
 [*.md]
-max_line_length = 0
+max_line_length = off
 trim_trailing_whitespace = false
 
-[*.yml]
-max_line_length = 0
+[*.{yml,yaml}]
+max_line_length = off
 
 [COMMIT_EDITMSG]
-max_line_length = 0
+max_line_length = off

.eslintignore

@@ -0,0 +1,2 @@
+**/node_modules/**
+**/action/**

.eslintrc.json

@@ -0,0 +1,21 @@
+{
+  "parser": "babel-eslint",
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2020,
+    "ecmaFeatures": {
+      "impliedStrict": true
+    }
+  },
+  "extends": ["airbnb", "plugin:unicorn/recommended", "prettier"],
+  "plugins": ["react", "jsx-a11y", "import", "prettier", "flowtype", "unicorn"],
+  "settings": { "react": { "version": "latest" } },
+  "rules": {
+    "prettier/prettier": "error",
+    "import/no-extraneous-dependencies": 0
+  }
+}

.github/workflows/main.yml

@@ -7,14 +7,39 @@ env:
   UNITY_LICENSE: "<?xml version=\"1.0\" encoding=\"UTF-8\"?><root>\n    <License id=\"Terms\">\n        <MachineBindings>\n            <Binding Key=\"1\" Value=\"d39b8e2f4d364b2e98b06afa0c6e08c5\"/>\n            <Binding Key=\"2\" Value=\"d39b8e2f4d364b2e98b06afa0c6e08c5\"/>\n        </MachineBindings>\n        <MachineID Value=\"Xxo1ZKbdPu/IATrc0mPBYANJFF0=\"/>\n        <SerialHash Value=\"1efd68fa935192b6090ac03c77d289a9f588c55a\"/>\n        <Features>\n            <Feature Value=\"33\"/>\n            <Feature Value=\"1\"/>\n            <Feature Value=\"12\"/>\n            <Feature Value=\"2\"/>\n            <Feature Value=\"24\"/>\n            <Feature Value=\"3\"/>\n            <Feature Value=\"36\"/>\n            <Feature Value=\"17\"/>\n            <Feature Value=\"19\"/>\n            <Feature Value=\"62\"/>\n        </Features>\n        <DeveloperData Value=\"AQAAAEY0LUg2WFMtUE00NS1SM0M4LUUyWlotWkdWOA==\"/>\n        <SerialMasked Value=\"F4-H6XS-PM45-R3C8-E2ZZ-XXXX\"/>\n        <StartDate Value=\"2018-05-02T00:00:00\"/>\n        <UpdateDate Value=\"2019-11-25T18:23:38\"/>\n        <InitialActivationDate Value=\"2018-05-02T14:21:28\"/>\n        <LicenseVersion Value=\"6.x\"/>\n        <ClientProvidedVersion Value=\"2019.2.11f1\"/>\n        <AlwaysOnline Value=\"false\"/>\n        <Entitlements>\n            <Entitlement Ns=\"unity_editor\" Tag=\"UnityPersonal\" Type=\"EDITOR\" ValidTo=\"9999-12-31T00:00:00\"/>\n        </Entitlements>\n    </License>\n<Signature xmlns=\"http://www.w3.org/2000/09/xmldsig#\"><SignedInfo><CanonicalizationMethod Algorithm=\"http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments\"/><SignatureMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#rsa-sha1\"/><Reference URI=\"#Terms\"><Transforms><Transform Algorithm=\"http://www.w3.org/2000/09/xmldsig#enveloped-signature\"/></Transforms><DigestMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#sha1\"/><DigestValue>JHdOBFmBNq2H8BrGFzir/StLoYo=</DigestValue></Reference></SignedInfo><SignatureValue>aENLHd37a51RtP2/g7YU0Pexf5mx0/ENXYGtrPzqwZ8NQt2AsSdxGnl0CUB45/GuNXfJVDt2HWot\ncNYZB2OylVBn1WHQbKZlPmm8gEAMz0MYbr4Isb5i5buryBrZlmbEOjnRI+pEg1CBwlgMo6xdtjjE\n/d7cC293QIUO91kdzRXftYou1dNaUyuPL9ZH65vdB2pDXGRNxgUVD+GnnqZA7b5L2HXqNQclcWAK\n5Yd1BeF3VzR1iLw9G/SmH5oOhnpXSmqbL4qk7LVP2/mgXpFk5kP4X8VC3z47obNhBIGq40dwWyEe\nUYk5/nRAOkZawDT+tcu96e06gPC9Cxk5PdbRbA==</SignatureValue></Signature></root>"
 
 jobs:
-  requestActivation:
-    name: Request activation ✔
+  tests:
+    name: Tests
     runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1.1.2
+        with:
+          node-version: 12.x
+      - run: yarn
+      - run: yarn lint
+      - run: yarn test
+      - run: yarn build || { echo "build command should always succeed" ; exit 61; }
+      - run: yarn build --quiet && git diff --quiet action || { echo "action should be auto generated" ; exit 62; }
+
+  requestActivation:
+    name: Activate ${{ matrix.unityVersion }} ✔
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        unityVersion:
+          # Note: Major version differences may require different activation files.
+          - 2018.4.15f1
+          - 2019.2.11f1
+          - 2019.2.14f1
+          - 2019.2.17f1
     steps:
       # Checkout repository (required to test local actions)
       - name: Checkout repository
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
 
       # Activate Unity
       - name: Activate Unity
         uses: ./
+        with:
+          unityVersion: ${{ matrix.unityVersion }}

.gitignore

@@ -1 +1,2 @@
 .idea
+node_modules

.prettierignore

@@ -0,0 +1,2 @@
+**/node_modules/**
+**/action/**

.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "printWidth": 100
+}

.yarnrc

@@ -0,0 +1,3 @@
+save-prefix ""
+--install.audit true
+--add.audit true

CONTRIBUTING.md

@@ -19,8 +19,20 @@ When fixing a bug it is fine to submit a pull request right away.
 
 Steps to be performed to submit a pull request:
 
-1. Fork the repository and create your branch from `master`
-2. Fill out the description, link any related issues and submit your pull request.
+1. Fork the repository and create your branch from `master`.
+2. Run `yarn` in the repository root.
+3. If you've fixed a bug or added code that should be tested, add tests!
+4. Fill out the description, link any related issues and submit your pull request.
+
+#### Pull Request Prerequisites
+
+You have [Node](https://nodejs.org/) installed at v12.2.0+ and [Yarn](https://yarnpkg.com/) at v1.18.0+.
+
+Please note that commit hooks will run automatically to perform some tasks;
+
+- format your code
+- run tests
+- build distributable files
 
 #### License
 

README.md

@@ -1,81 +1,46 @@
-# Unity - Activate
-[![Actions status](https://github.com/webbertakken/unity-activate/workflows/Actions%20%F0%9F%98%8E/badge.svg)](https://github.com/webbertakken/unity-activate/actions?query=branch%3Amaster+workflow%3A"Actions+😎")
+<div align="center">
+<a href="https://github.com/marketplace/actions/unity-activate">
+<img width="800" src="media/UnityActivate-Logo.png" alt="Unity Activate">
+</a>
+<br />
+<br />
 
----
+GitHub Action to [activate](https://github.com/marketplace/actions/unity-activate) Unity.
 
-GitHub Action to [activate Unity](https://github.com/marketplace/actions/unity-activate). 
+Part of the <a href="https://unity-ci.com"><img height="30" src="media/UnityCI-ReferenceLogo.png" alt="Unity CI"></a> open source project.
+<br />
+<br />
 
-Part of the [Unity Actions](https://github.com/webbertakken/unity-actions) collection.
+[![Actions status](https://github.com/webbertakken/unity-activate/workflows/Actions%20%F0%9F%98%8E/badge.svg?event=push&branch=master)](https://github.com/webbertakken/unity-activate/actions?query=branch%3Amaster+event%3Apush+workflow%3A"Actions%20%F0%9F%98%8E")
+<br />
+<br />
 
----
+</div>
 
-Use this action to activate Unity using credentials or a license file. Both 
-**personal** and **professional** licenses are supported.
+## How to use
 
-When successfully activated, you will be able to run the 
-[Test](https://github.com/webbertakken/unity-actions#test) and
-[Build](https://github.com/webbertakken/unity-actions#build)
-actions.
+Find the
+[docs](https://unity-ci.com/docs/github)
+on the Unity CI
+[website](https://unity-ci.com/).
 
-### Documentation
+## Related actions
 
-See the 
-[Unity Actions](https://github.com/webbertakken/unity-actions)
-collection repository for workflow documentation and reference implementation.
+Visit the
+<a href="https://github.com/webbertakken/unity-actions"><img height="30" src="media/UnityActions-ReferenceLogo.png" alt="Unity Actions"></a>
+status repository for related Actions.
 
-## Usage
+## Community
 
-Create or edit the file called `.github/workflows/activation.yml` and add a job to it.
+Feel free to join us on
+<a href="http://unity-ci.com/discord"><img height="30" src="media/Discord-Logo.svg" alt="Discord" /></a>
+and engage with the community.
 
-```yaml
-name: Activate Unity
-on: [push]
-jobs:
-  requestActivation:
-    name: Request activation ✔
-    runs-on: ubuntu-latest
-    steps:
-```
+## Contributing
 
-Continue to either the personal license or professional license section below.
+To help out sharpen the documentation, please find the docs [repository](https://github.com/Unity-CI/Website).
 
-#### Personal license
-
-1. Follow the **activation** section from [request action](https://github.com/marketplace/actions/unity-request-activation-file) to set `UNITY_LICENSE` variable.
-2. Use the action as follows:
-
-```yaml
-- name: Activate Unity
-  uses: webbertakken/unity-activate@v1.1
-  env:
-    UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
-```
-
-#### Professional license
-
-1. Goto `Repository` > `Settings` > `Secrets`
-2. Set the following secrets:
-    - `UNITY_EMAIL`: &lt;your_unity_login_email_address&gt;
-    - `UNITY_PASSWORD`: &lt;your_unity_login_password&gt;
-    - `UNITY_SERIAL`: &lt;your_unity_serial&gt;
-3. Use the action as follows:
-
-```yaml
-- name: Activate Unity
-  uses: webbertakken/unity-activate@v1.1
-  env:
-    UNITY_EMAIL:    ${{ secrets.UNITY_EMAIL }}
-    UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
-    UNITY_SERIAL:   ${{ secrets.UNITY_SERIAL }}
-```
-
-## More actions
-
-Visit 
-[Unity Actions](https://github.com/webbertakken/unity-actions) 
-to find related actions for Unity.
-
-Feel free to contribute.
+To contribute to this project, kindly read the [contribution guide](./CONTRIBUTING.md).
 
 ## Licence
 

action.yml

@@ -1,11 +1,15 @@
 name: 'Unity - Activate'
 author: Webber Takken <webber@takken.io>
 description: 'Activate Unity using credentials or a license file. Both personal and professional licenses are supported.'
-inputs: {}
+inputs:
+  unityVersion:
+    required: false
+    default: '2019.2.11f1'
+    description: 'Version of unity to use for building the project.'
 outputs: {}
-runs:
-  using: 'docker'
-  image: 'Dockerfile'
 branding:
   icon: 'box'
   color: 'gray-dark'
+runs:
+  using: 'node12'
+  main: 'action/index.js'

action/Dockerfile

@@ -1,4 +1,5 @@
-FROM gableroux/unity3d:2019.2.11f1
+ARG IMAGE
+FROM $IMAGE
 
 LABEL "com.github.actions.name"="Unity - Activate"
 LABEL "com.github.actions.description"="Activate Unity using credentials or a license file. Both personal and professional licenses are supported."

action/entrypoint.sh

@@ -1,5 +1,11 @@
 #!/usr/bin/env bash
 
+#
+# Display the unity version
+#
+
+echo "Activating Unity version \"$UNITY_VERSION\"."
+
 if [[ -n "$UNITY_LICENSE" ]]; then
   #
   # PERSONAL LICENSE MODE
@@ -92,10 +98,21 @@ fi
 #
 if [ $UNITY_EXIT_CODE -eq 0 ]; then
   # Activation was a success
-  echo "Activation complete."
+  echo ""
+  echo "###########################"
+  echo "#   Activation complete   #"
+  echo "###########################"
+  echo ""
 else
-  # Activation failed so exit with the code from the license verification step
-  echo "Unclassified error occured while trying to activate license."
-  echo "Exit code was: $UNITY_EXIT_CODE"
+  echo ""
+  echo "###########################"
+  echo "#         Failure         #"
+  echo "###########################"
+  echo ""
+  echo "Please note that the exit code is not very descriptive."
+  echo "Most likely it will not help you solve the issue."
+  echo ""
+  echo "To find the reason for failure: please search for errors in the log above."
+  echo ""
   exit $UNITY_EXIT_CODE
 fi

babel.config.js

@@ -0,0 +1,15 @@
+const esModules = ['lodash-es'].join('|');
+
+module.exports = {
+  ignore: [`/node_modules/(?!${esModules})`],
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        targets: {
+          node: true,
+        },
+      },
+    ],
+  ],
+};

jest.config.js

@@ -0,0 +1,8 @@
+const esModules = ['lodash-es'].join('|');
+
+module.exports = {
+  testEnvironment: 'node',
+  moduleFileExtensions: ['js', 'jsx', 'json', 'vue'],
+  transform: { '^.+\\.(js|jsx)?$': 'babel-jest' },
+  transformIgnorePatterns: [`/node_modules/(?!${esModules})`],
+};

media/Discord-Logo.svg

@@ -0,0 +1 @@
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package.json

@@ -0,0 +1,57 @@
+{
+  "name": "unity-activate",
+  "version": "0.0.0",
+  "description": "Activate Unity using credentials or a license file. Both personal and professional licenses are supported.",
+  "main": "action/index.js",
+  "repository": "git@github.com:webbertakken/unity-activate.git",
+  "author": "Webber <webber@takken.io>",
+  "license": "MIT",
+  "scripts": {
+    "build": "ncc build src --out action --minify",
+    "lint": "prettier --check \"src/**/*.js\" && eslint src",
+    "test": "jest"
+  },
+  "dependencies": {
+    "@actions/core": "^1.2.2",
+    "@actions/exec": "1.0.3",
+    "@actions/github": "^2.1.1"
+  },
+  "devDependencies": {
+    "@babel/cli": "7.8.4",
+    "@babel/core": "7.8.7",
+    "@babel/preset-env": "7.8.7",
+    "@zeit/ncc": "0.21.1",
+    "babel-eslint": "10.1.0",
+    "eslint": "6.8.0",
+    "eslint-config-airbnb": "18.0.1",
+    "eslint-config-prettier": "6.10.0",
+    "eslint-plugin-flowtype": "4.6.0",
+    "eslint-plugin-import": "2.20.1",
+    "eslint-plugin-jsx-a11y": "6.2.3",
+    "eslint-plugin-prettier": "3.1.2",
+    "eslint-plugin-react": "7.19.0",
+    "eslint-plugin-unicorn": "17.1.0",
+    "husky": "4.2.3",
+    "jest": "25.1.0",
+    "lint-staged": "10.0.8",
+    "lodash-es": "4.17.15",
+    "prettier": "1.19.1"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged && yarn build && git add action/index.js"
+    }
+  },
+  "lint-staged": {
+    "*.{js,jsx}": [
+      "prettier --write",
+      "eslint",
+      "git add",
+      "jest --findRelatedTests"
+    ],
+    "*.{json,md,yaml,yml}": [
+      "prettier --write",
+      "git add"
+    ]
+  }
+}

src/index.js

@@ -0,0 +1,21 @@
+import { Action, Docker, Input, ImageTag } from './model';
+
+const core = require('@actions/core');
+
+async function action() {
+  Action.checkCompatibility();
+
+  const { dockerfile, workspace, actionFolder } = Action;
+  const { unityVersion } = Input.getFromUser();
+  const baseImage = ImageTag.createForBase(unityVersion);
+
+  // Build docker image
+  const actionImage = await Docker.build({ path: actionFolder, dockerfile, baseImage });
+
+  // Run docker image
+  await Docker.run(actionImage, { workspace, unityVersion });
+}
+
+action().catch(error => {
+  core.setFailed(error.message);
+});

src/model/action.js

@@ -0,0 +1,48 @@
+import path from 'path';
+
+class Action {
+  static get supportedPlatforms() {
+    return ['linux'];
+  }
+
+  static get isRunningLocally() {
+    return process.env.RUNNER_WORKSPACE === undefined;
+  }
+
+  static get isRunningFromSource() {
+    return path.basename(__dirname) === 'model';
+  }
+
+  static get name() {
+    return 'unity-activate';
+  }
+
+  static get rootFolder() {
+    if (Action.isRunningFromSource) {
+      return path.dirname(path.dirname(path.dirname(__filename)));
+    }
+
+    return path.dirname(path.dirname(__filename));
+  }
+
+  static get actionFolder() {
+    return `${Action.rootFolder}/action`;
+  }
+
+  static get dockerfile() {
+    return `${Action.actionFolder}/Dockerfile`;
+  }
+
+  static get workspace() {
+    return process.env.GITHUB_WORKSPACE;
+  }
+
+  static checkCompatibility() {
+    const currentPlatform = process.platform;
+    if (!Action.supportedPlatforms.includes(currentPlatform)) {
+      throw new Error(`Currently ${currentPlatform}-platform is not supported`);
+    }
+  }
+}
+
+export default Action;

src/model/action.test.js

@@ -0,0 +1,36 @@
+import path from 'path';
+import fs from 'fs';
+import Action from './action';
+
+describe('Action', () => {
+  describe('compatibility check', () => {
+    it('throws for anything other than linux', () => {
+      if (process.platform !== 'linux') {
+        expect(() => Action.checkCompatibility()).toThrow();
+      } else {
+        expect(() => Action.checkCompatibility()).not.toThrow();
+      }
+    });
+  });
+
+  it('returns the root folder of the action', () => {
+    const { rootFolder, name } = Action;
+
+    expect(path.basename(rootFolder)).toStrictEqual(name);
+    expect(fs.existsSync(rootFolder)).toStrictEqual(true);
+  });
+
+  it('returns the action folder', () => {
+    const { actionFolder } = Action;
+
+    expect(path.basename(actionFolder)).toStrictEqual('action');
+    expect(fs.existsSync(actionFolder)).toStrictEqual(true);
+  });
+
+  it('returns the docker file', () => {
+    const { dockerfile } = Action;
+
+    expect(path.basename(dockerfile)).toStrictEqual('Dockerfile');
+    expect(fs.existsSync(dockerfile)).toStrictEqual(true);
+  });
+});

src/model/docker.js

@@ -0,0 +1,57 @@
+import { exec } from '@actions/exec';
+import ImageTag from './image-tag';
+
+class Docker {
+  static async build(buildParameters, silent = false) {
+    const { path, dockerfile, baseImage } = buildParameters;
+    const { version } = baseImage;
+
+    const tag = ImageTag.createForAction(version);
+    const command = `docker build ${path} \
+      --file ${dockerfile} \
+      --build-arg IMAGE=${baseImage} \
+      --tag ${tag}`;
+
+    await exec(command, null, { silent });
+
+    return tag;
+  }
+
+  static async run(image, parameters, silent = false) {
+    const { unityVersion, workspace } = parameters;
+
+    const command = `docker run \
+        --workdir /github/workspace \
+        --rm \
+        --env UNITY_LICENSE \
+        --env UNITY_EMAIL \
+        --env UNITY_PASSWORD \
+        --env UNITY_SERIAL \
+        --env UNITY_VERSION=${unityVersion} \
+        --env HOME=/github/home \
+        --env GITHUB_REF \
+        --env GITHUB_SHA \
+        --env GITHUB_REPOSITORY \
+        --env GITHUB_ACTOR \
+        --env GITHUB_WORKFLOW \
+        --env GITHUB_HEAD_REF \
+        --env GITHUB_BASE_REF \
+        --env GITHUB_EVENT_NAME \
+        --env GITHUB_WORKSPACE=/github/workspace \
+        --env GITHUB_ACTION \
+        --env GITHUB_EVENT_PATH \
+        --env RUNNER_OS \
+        --env RUNNER_TOOL_CACHE \
+        --env RUNNER_TEMP \
+        --env RUNNER_WORKSPACE \
+        --volume "/var/run/docker.sock":"/var/run/docker.sock" \
+        --volume "/home/runner/work/_temp/_github_home":"/github/home" \
+        --volume "/home/runner/work/_temp/_github_workflow":"/github/workflow" \
+        --volume "${workspace}":"/github/workspace" \
+        ${image}`;
+
+    await exec(command, null, { silent });
+  }
+}
+
+export default Docker;

src/model/docker.test.js

@@ -0,0 +1,20 @@
+import Action from './action';
+import Docker from './docker';
+import ImageTag from './image-tag';
+
+describe('Docker', () => {
+  it('builds', async () => {
+    const path = Action.actionFolder;
+    const dockerfile = `${path}/Dockerfile`;
+    const baseImage = new ImageTag({
+      repository: '',
+      name: 'alpine',
+      version: '3',
+    });
+
+    const tag = await Docker.build({ path, dockerfile, baseImage }, true);
+
+    expect(tag).toBeInstanceOf(ImageTag);
+    expect(tag.toString()).toStrictEqual('unity-action:3');
+  }, 240000);
+});

src/model/image-tag.js

@@ -0,0 +1,41 @@
+import { trimStart } from 'lodash-es';
+
+class ImageTag {
+  static createForBase(version) {
+    const repository = 'gableroux';
+    const name = 'unity3d';
+    return new this({ repository, name, version });
+  }
+
+  static createForAction(version) {
+    const repository = '';
+    const name = 'unity-action';
+    return new this({ repository, name, version });
+  }
+
+  constructor({ repository = '', name, version }) {
+    if (!ImageTag.versionPattern.test(version)) {
+      throw new Error(`Invalid version "${version}".`);
+    }
+
+    Object.assign(this, { repository, name, version });
+  }
+
+  static get versionPattern() {
+    return /^20\d{2}\.\d\.\w{3,4}|3$/;
+  }
+
+  get tag() {
+    return this.version;
+  }
+
+  get image() {
+    return trimStart(`${this.repository}/${this.name}`, '/');
+  }
+
+  toString() {
+    return `${this.image}:${this.tag}`;
+  }
+}
+
+export default ImageTag;

src/model/image-tag.test.js

@@ -0,0 +1,38 @@
+import ImageTag from './image-tag';
+
+describe('UnityImageVersion', () => {
+  describe('constructor', () => {
+    const some = {
+      name: 'someName',
+      version: '2020.0.00f0',
+    };
+
+    it('can be called', () => {
+      expect(() => new ImageTag(some)).not.toThrow();
+    });
+
+    it('accepts parameters and sets the right properties', () => {
+      const image = new ImageTag(some);
+
+      expect(image.repository).toStrictEqual('');
+      expect(image.name).toStrictEqual(some.name);
+      expect(image.version).toStrictEqual(some.version);
+    });
+
+    test.each(['2000.0.0f0', '2011.1.11f1'])('accepts %p version format', version => {
+      expect(() => new ImageTag({ version })).not.toThrow();
+    });
+
+    test.each(['some version', '', 1, null])('throws for incorrect versions %p', version => {
+      expect(() => new ImageTag({ version })).toThrow();
+    });
+  });
+
+  describe('toString', () => {
+    it('returns the correct version', () => {
+      const image = ImageTag.createForBase('2099.1.1111');
+
+      expect(image.toString()).toStrictEqual(`gableroux/unity3d:2099.1.1111`);
+    });
+  });
+});

src/model/index.js

@@ -0,0 +1,6 @@
+import Action from './action';
+import Docker from './docker';
+import Input from './input';
+import ImageTag from './image-tag';
+
+export { Action, Docker, Input, ImageTag };

src/model/index.test.js

@@ -0,0 +1,7 @@
+import * as Index from '.';
+
+describe('Index', () => {
+  test.each(['Action', 'Docker', 'ImageTag', 'Input'])('exports %s', exportedModule => {
+    expect(typeof Index[exportedModule]).toStrictEqual('function');
+  });
+});

src/model/input.js

@@ -0,0 +1,15 @@
+const core = require('@actions/core');
+
+class Input {
+  static getFromUser() {
+    // Input variables specified in workflow using "with" prop.
+    const unityVersion = core.getInput('unityVersion') || '2019.2.11f1';
+
+    // Return sanitised input
+    return {
+      unityVersion,
+    };
+  }
+}
+
+export default Input;

src/model/input.test.js

@@ -0,0 +1,13 @@
+import Input from './input';
+
+describe('Input', () => {
+  describe('getFromUser', () => {
+    it('does not throw', () => {
+      expect(() => Input.getFromUser()).not.toThrow();
+    });
+
+    it('returns an object', () => {
+      expect(typeof Input.getFromUser()).toStrictEqual('object');
+    });
+  });
+});