Add initial e2e test setup

.eslintrc.js

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+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+    root: true,
+    extends: [
+        './configs/base.playwright.eslintrc.json',
+        './configs/warnings.eslintrc.json',
+        './configs/errors.eslintrc.json',
+        './configs/ui-tests.eslintrc.json',
+        './configs/ui-tests.playwright.eslintrc.json'
+    ],
+    ignorePatterns: [
+        '**/{node_modules,lib}'
+    ],
+    parserOptions: {
+        tsconfigRootDir: __dirname,
+        project: 'tsconfig.json'
+    }
+};

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Question
+    url: https://community.theia-ide.org
+    about: Please ask questions on the Theia Discourse.
+  - name: Create issue
+    url: https://github.com/eclipse-theia/theia-e2e-test-suite/issues/new/choose
+    about: Please create issues in this repository.

.github/workflows/main.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: "0 4 * * *" # Runs every day at 4am: https://docs.github.com/en/actions/reference/events-that-trigger-workflows#scheduled-events-schedule
+
+jobs:
+  build:
+    name: E2E Tests on ubuntu-18.04 with Node.js 16.x
+
+    runs-on: ubuntu-18.04
+    timeout-minutes: 60
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Use Node.js "16.x"
+        uses: actions/setup-node@v1
+        with:
+          node-version: "16.x"
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Use Python 3.x
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.x"
+
+      - name: Build
+        shell: bash
+        run: |
+          yarn
+
+      - name: Checkout Theia
+        uses: actions/checkout@master
+        with:
+          repository: eclipse-theia/theia
+          path: ./theia
+
+      - name: Build Theia
+        shell: bash
+        working-directory: ./theia
+        run: |
+          yarn --skip-integrity-check --network-timeout 100000
+          yarn browser build
+
+      - name: Run Theia
+        shell: bash
+        working-directory: ./theia
+        run: yarn browser start &
+
+      - name: Test (playwright)
+        uses: GabrielBB/xvfb-action@v1
+        with:
+          run: yarn ui-tests-ci
+
+      - name: Generate Report
+        uses: simple-elf/allure-report-action@master
+        if: always()
+        id: allure-report
+        with:
+          allure_results: allure-results
+          gh_pages: gh-pages
+          allure_report: allure-report
+          allure_history: allure-history
+
+      - name: Publish Report
+        if: always() && github.ref == 'refs/heads/main'
+        uses: peaceiris/actions-gh-pages@v2
+        env:
+          PERSONAL_TOKEN: ${{ secrets.TOKEN }}
+          PUBLISH_BRANCH: gh-pages
+          PUBLISH_DIR: allure-history

.gitignore

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+.DS_Store
+**/node_modules
+**/.browser_modules
+**/dist
+**/lib
+**/src-gen
+**/gen-webpack.config.js
+**/plugins
+**/tsconfig.tsbuildinfo
+*.log
+
+node_modules
+allure-results
+test-results

.vscode/extensions.json

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+{
+  // See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+  // Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+  // List of extensions which should be recommended for users of this workspace.
+  "recommendations": [
+    "dbaeumer.vscode-eslint"
+  ],
+  // List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+  "unwantedRecommendations": []
+}

.vscode/launch.json

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+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Debug selected test file",
+      "type": "node",
+      "request": "launch",
+      "program": "${workspaceFolder}/node_modules/.bin/playwright",
+      "args": [
+        "test",
+        "--debug",
+        "--config=./configs/playwright.debug.config.ts",
+        "${fileBasenameNoExtension}"
+      ],
+      "cwd": "${workspaceFolder}",
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen"
+    }
+  ]
+}

.vscode/settings.json

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+// If one would like to add/remove/modify user preferences without modifying the content of the
+// workspace settings file, then one would need to modify the `settings.json` under here:
+// - Windows: %APPDATA%\Code\User\settings.json
+// - Linux: $HOME/.config/Code/User/settings.json
+// - Mac: $HOME/Library/Application Support/Code/User/settings.json
+{
+  "editor.formatOnSave": true,
+  "search.exclude": {
+    "**/node_modules": true,
+    "**/lib": true,
+    "**/coverage": true
+  },
+  "editor.insertSpaces": true,
+  "[typescript]": {
+    "editor.tabSize": 4,
+    "editor.defaultFormatter": "vscode.typescript-language-features",
+  },
+  "[javascript]": {
+    "editor.tabSize": 4,
+    "editor.defaultFormatter": "vscode.typescript-language-features"
+  },
+  "[json]": {
+    "editor.tabSize": 2,
+    "editor.defaultFormatter": "vscode.json-language-features",
+  },
+  "[jsonc]": {
+    "editor.tabSize": 2,
+    "editor.defaultFormatter": "vscode.json-language-features",
+  },
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "files.insertFinalNewline": true,
+  "editor.rulers": [
+    180
+  ], // ESLint `max-len` rule.
+}

.vscode/tasks.json

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+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "Run all tests",
+      "type": "shell",
+      "group": {
+        "kind": "test",
+        "isDefault": true
+      },
+      "command": "yarn ui-tests",
+      "presentation": {
+        "reveal": "always",
+        "panel": "shared"
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Run selected test file in headless mode",
+      "type": "shell",
+      "group": "test",
+      "command": "yarn ui-tests ${fileBasenameNoExtension}",
+      "presentation": {
+        "reveal": "always",
+        "panel": "shared"
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Run selected test file in headful mode",
+      "type": "shell",
+      "group": "test",
+      "command": "yarn ui-tests-headful ${fileBasenameNoExtension}",
+      "presentation": {
+        "reveal": "always",
+        "panel": "shared"
+      },
+      "problemMatcher": []
+    },
+    {
+      "label": "Generate and open test report",
+      "type": "shell",
+      "group": "test",
+      "command": "yarn ui-tests-report",
+      "presentation": {
+        "reveal": "always",
+        "panel": "new"
+      },
+      "problemMatcher": []
+    }
+  ]
+}

CODE_OF_CONDUCT.md

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+<div id="theia-logo" align="left">
+    <br />
+    <img src="https://raw.githubusercontent.com/eclipse-theia/theia/master/logo/EF_GRY-OR_svg.svg?sanitize=true" alt="Eclipse Logo" width="300"/>
+</div>
+
+# Community Code of Conduct
+
+Version 1.1
+
+October 21, 2019
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to make participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+- The use of sexualized language or imagery and unwelcome sexual attention or advances
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or electronic address, without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies within all project spaces, and it also applies when an individual is representing the project or its community in public spaces. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at [email protected]. All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org), version 1.4, available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+For answers to common questions about this code of conduct, see https://www.contributor-covenant.org/faq
+
+<div id="theia-logo" align="left">
+    <br />
+    <img src="https://www.eclipse.org/images/Eclipse_Code_of_Conduct.png" alt="Eclipse Logo" width="150"/>
+</div>
+
+----
+Note: Please see [here](https://www.eclipse.org/org/documents/Community_Code_of_Conduct.php) for the latest version of this document, hosted at the Eclipse Foundation