test: add tests for git connection (#1289)

* chore: add data-test attributes

* test: add github connection test, add applications modal

* chore: embed test GITHUB_CLIENT_* environment values

---------

Co-authored-by: Ali BARIN <ali.barin53@gmail.com>

packages/e2e-tests/fixtures/applications-modal.js

@@ -0,0 +1,34 @@
+const { GithubPage } = require('./apps/github/github-page');
+const { BasePage } = require('./base-page');
+
+export class ApplicationsModal extends BasePage {
+
+  applications = {
+    github: GithubPage
+  };
+
+  /**
+   * @param {import('@playwright/test').Page} page
+   */
+  constructor (page) {
+    super(page);
+    this.modal = page.getByTestId('add-app-connection-dialog');
+    this.searchInput = page.getByTestId('search-for-app-text-field');
+    this.appListItem = page.getByTestId('app-list-item');
+    this.appLoader = page.getByTestId('search-for-app-loader');
+  }
+
+  /**
+   * @param string link
+   */
+  async selectLink (link) {
+    if (this.applications[link] === undefined) {
+      throw {
+        message: `Unknown link "${link}" passed to ApplicationsModal.selectLink`
+      }
+    }
+    await this.searchInput.fill(link);
+    await this.appListItem.first().click();
+    return new this.applications[link](this.page);
+  }
+}